SYSTEM FOR CO2 STORAGE AND UTILIZATION OF CONCRETE MIXING PLANT AND METHOD THEREOF

Abstract

The present disclosure provides a system for CO.sub.2 storage and utilization of a concrete mixing plant and a method thereof. The system includes a slurry making module, a cyclic grinding module and a material storage and application module. The cyclic grinding module can grind, in the presence of a gas containing CO.sub.2 and medium balls, a composite slurry prepared by the slurry making module, and can cyclically use the gas containing CO.sub.2, so as to realize continuous production of a carbon-mineralized slurry. The material storage and application module includes a material storage bin and a mixing machine connected with each other, and the material storage bin is configured to receive and store the carbon-mineralized slurry from a slurry bin. The mixing machine is configured to mix and prepare the carbon-mineralized slurry into a commodity concrete.

Claims

1. A system for CO.sub.2 storage and utilization of a concrete mixing plant, comprising a slurry making module, a cyclic grinding module and a material storage and application module, wherein, the slurry making module is configured to mix a concrete mixing plant waste slurry, a natural ore and an industrial aid to produce a composite slurry and convey the composite slurry to the cyclic grinding module; the cyclic grinding module comprises a grinding machine, a material discharge component and a CO.sub.2 circulating component, a mixing element is disposed inside the grinding machine, the mixing element comprises a hollow rotary shaft and medium balls, the material discharge component comprises a gas storage bin and a slurry bin communicated with each other and disposed up and down, the gas storage bin is connected sequentially with the grinding machine and the CO.sub.2 circulating component, the gas storage bin is configured to supply a gas containing CO.sub.2 to the CO.sub.2 circulating component, the CO.sub.2 circulating component is configured to convey the gas to the grinding machine and recover a tail gas containing CO.sub.2 generated during a grinding process of the gas containing CO.sub.2 and the medium balls for the composite slurry in the grinding machine, and the grinding machine is configured to grind and prepare the composite slurry in the presence of the gas containing CO.sub.2 and the medium balls into a carbon-mineralized slurry and convey the carbon-mineralized slurry to the slurry bin of the material discharge component; the material storage and application module comprises a material storage bin and a mixing machine connected with each other, and the material storage bin is configured to receive and store the carbon-mineralized slurry from the slurry bin, and the mixing machine is configured to mix and prepare the carbon-mineralized slurry into a commodity concrete; the slurry making module comprises a sand stone separating machine, a sand removing machine and a slurry making machine connected sequentially, the slurry making machine comprises a machine body, a slurry outlet at an outer side of the machine body, a material-adding opening on a top of the machine body, a first rotary shaft in a middle of the top of the machine body and a first motor on the top of the machine body, rotary blades are disposed at a lower end of the first rotary shaft and extended into the machine body, and an upper end of the first rotary shaft is connected with a drive part of the first motor through a bevel gear; the grinding machine comprises a cylinder body, a material inlet at a bottom of the cylinder body, a screen in the cylinder body, a sealed console on a top of the cylinder body and the mixing element in the sealed console, the material inlet is connected with the slurry outlet of the slurry making machine, the screen divides an interior of the cylinder body into an above-screen finished product bin and an under-screen grinding bin, a gas inlet provided with a gas pipe is opened on a top of the sealed console, the mixing element further comprises a second motor and a drive rotary rod, an output end of the second motor is fixedly connected with the drive rotary rod, the drive rotary rod is fixedly connected with the hollow rotary shaft, a top of the hollow rotary shaft is connected with the gas pipe, a lower end of the hollow rotary shaft extends to the grinding bin, centrifugal blades and uniformly-distributed gas outlets are disposed on the hollow rotary shaft in the grinding bin, and a first material outlet is disposed at an outer side of the finished product bin; a slurry inlet is disposed at a side of the gas storage bin of the material discharge component, the slurry inlet is connected with the first material outlet of the finished product bin, a gas relief opening and a gas pressure meter are disposed on a top of the gas storage bin, the CO.sub.2 circulating component is provided with a circulating gas inlet and a circulating gas outlet, the gas relief opening of the gas storage bin is connected with the circulating gas inlet of the CO.sub.2 circulating component, the circulating gas outlet is connected with the gas inlet of the grinding machine, and an outlet end of the slurry bin of the material discharge component is connected with a U-shaped pipe; a feed pipe connected with the U-shaped pipe is disposed at an upper end of an outer side of the material storage bin, and a second material outlet connected with the mixing machine is disposed on a top of the material storage bin.

2. The system of claim 1, wherein a cooling cylinder is disposed outside the cylinder body of the grinding machine, and a lower part and an upper part of the cooling cylinder are respectively provided with a water inlet and a water outlet; an inner bottom of the finished product bin of the grinding machine has an angle of inclination of 5 to 15.

3. The system of claim 2, wherein a weight measurement meter on which a display is disposed is further disposed at a bottom of the machine body of the slurry making machine; a first electronic valve and a first feed pump are sequentially disposed on the slurry outlet of the slurry making machine; a second electronic valve and a strainer are sequentially disposed on the material inlet of the grinding machine, and the water inlet of the cooling cylinder is provided with a third electronic valve; a fourth electronic valve and a second feed pump are sequentially disposed on the U-shaped pipe; a rotary bearing is disposed on an upper end and a lower end of an interior of the material storage bin respectively, the rotary bearing is connected with a rotational shaft, an end of the rotational shaft away from the rotary bearing is provided with helical blades, and the second material outlet is provided with a third feed pump.

4. The system of claim 3, further comprising a control module configured to control the slurry making module, the cyclic grinding module and the material storage and application module; the control module is electrically connected with the first electronic valve, the second electronic valve, the third electronic valve, the fourth electronic valve, the first feed pump, the second feed pump, the third feed pump, the first motor, the second motor, the CO.sub.2 circulating component, the sand stone separating machine and the sand removing machine respectively.

5. A method of CO.sub.2 storage and utilization of a concrete mixing plant by using the system of claim 4, comprising the following steps: at step S1, obtaining a composite slurry by mixing a concrete mixing plant waste slurry, a solid waste, a natural ore and an industrial aid in the slurry making machine; at step S2, conveying the composite slurry into the grinding machine and performing grinding in the presence of the medium balls; at step S3, after the slurry bin is filled up, sealing the grinding machine and using the CO.sub.2 circulating component to convey a gas containing CO.sub.2 in the gas storage bin to the grinding machine to enable the composite slurry to go through grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and be prepared into a carbon-mineralized slurry; at step S4, repeating the step S3 and cyclically using the gas containing CO.sub.2 until the content of CO.sub.2 is lower than 5%, and providing new gas containing CO.sub.2 by the gas storage bin to perform grinding reaction, so as to realize continuous production of the carbon-mineralized slurry; and at step S5, conveying the carbon-mineralized slurry into the mixing machine and mixing with a cement, a mineral admixture, an aggregate, water and a water reducer to obtain a carbon fixation commodity concrete; wherein in the grinding process of the steps S2 to S4, a feeding rate is 10 to 50 L/min, a stay time in the grinding bin is not greater than 40 min, a grinding rate is 150 to 1000 r/min, and a ball-material ratio of the medium balls to the composite slurry is 1:1 to 5:1.

6. The method of claim 5, wherein a solid-liquid ratio of the composite slurry is 3:1 to 3:17, and a fluidity is 160 to 280 mm; the solid waste comprises at least one of steel slag, blast furnace slag, high calcium fly ash, electric furnace slag, carbide slag, magnesium slag, biomass ash, cement kiln dust, municipal waste incineration ash, and construction waste micropowder, and a total mass ratio of CaO, MgO and FeO in the solid waste is 10%; the natural ore comprises at least one of wollastonite, olivine, serpentine, talcum, pyroxene and feldspar; a CO.sub.2 content of the gas containing CO.sub.2 is 30%, concentrations of NO.sub.x and SO.sub.2 are 400 mg/m.sup.3 and 200 mg/m.sup.3 respectively, and a conveying rate of carbon dioxide is 200 to 1000 L/min; when a pressure of the gas storage bin is 0.18 MPa, the gas containing CO.sub.2 is conveyed, and when the pressure of the gas storage bin is 0.25 MPa, the conveying of the gas containing CO.sub.2 is stopped; a ratio of a content of the industrial aid to a solid mass of the composite slurry is 0.01 to 0.2%, and the industrial aid comprises at least one of a dispersing agent, a defoaming agent, a suspending agent, a neutralizing agent, a chelating agent, a solubilizing agent and a nucleating agent; a mean particle size of the carbon-mineralized slurry is 20 m, a carbonization reaction degree is 10 to 80%, and a solid-liquid ratio is 4:1 to 2:11; a comprehensive power consumption of continuous production of the carbon-mineralized slurry is 12 to 80 kW.Math.h.

7. The method of claim 6, wherein when the solid waste is at least one of steel slag, carbide slag, magnesium slag, construction waste micropowder, biomass ash, cement kiln dust and municipal waste incineration ash, an absolute dry mass ratio of the concrete mixing plant waste slurry to the solid waste to the natural ore is 1:15 to 65:0 to 20; when the solid waste is at least one of blast furnace slag, high calcium fly ash and electric furnace slag, an absolute dry mass ratio of the concrete mixing plant waste slurry to the solid waste to the natural ore is 1:1 to 15:0 to 20.

8. The method of claim 7, wherein in the step S5, a mixing sequence is the aggregate, the mineral admixture, the cement, the water, the carbon-mineralized slurry and the water reducer, and a forced mixing time is 10 to 90 s; the carbon fixation commodity concrete comprises ordinary concrete, underwater concrete, fine aggregate concrete, impermeable concrete and road concrete.

9. The method of claim 8, wherein the ordinary concrete comprises, by mass percent, the carbon-mineralized slurry 0.5 to 12.5%, the cement 2.5 to 15%, the mineral admixture 3.5 to 7.5%, the aggregate 70.3 to 83.8%, the water 6.2 to 7.7%, and the water reducer 0.2 to 0.8%; the underwater concrete comprises, by mass percent, the carbon-mineralized slurry 1.5 to 12.5%, the cement 2.5 to 15%, the mineral admixture 4.5 to 6.0%, the aggregate 71.5 to 75.9%, the water 6.2 to 6.4%, and the water reducer 0.4 to 0.6%, and a mean particle size of the carbon-mineralized slurry in the underwater concrete is not greater than 2 m; the fine aggregate concrete comprises, by mass percent, the carbon-mineralized slurry 0.5 to 5.6%, the cement 2.5 to 8.1%, the mineral admixture 3.5 to 5.2%, the aggregate 80.1 to 83.8%, the water 6.8 to 7.7%, and the water reducer 0.3 to 0.5%, and a mean particle size of the carbon-mineralized slurry in the fine aggregate concrete is 10 to 20 m; the impermeable concrete comprises, by mass percent, the carbon-mineralized slurry 0.7 to 11.7%, the cement 4.3 to 14.2%, the mineral admixture 3.6 to 7.5%, the aggregate 70.3 to 83.7%, the water 6.2 to 6.5%, and the water reducer 0.2 to 0.8%, and a mean particle size of the carbon-mineralized slurry in the impermeable concrete is 2 to 5 m; the road concrete comprises, by mass percent, the carbon-mineralized slurry 0.5 to 5.4%, the cement 2.5 to 7.9%, the mineral admixture 3.5 to 5.3%, the aggregate 80.3 to 83.8%, the water 6.8 to 7.7%, and the water reducer 0.2 to 0.5%, and a mean particle size of the carbon-mineralized slurry in the road concrete is 6 to 10 m.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0063] FIG. 1 is a schematic diagram illustrating a system for CO.sub.2 storage and utilization of a concrete mixing plant according to an embodiment of the present disclosure.

[0064] FIG. 2 is a structural schematic diagram illustrating a system for CO.sub.2 storage and utilization of a concrete mixing plant according to an embodiment of the present disclosure.

[0065] FIG. 3 is a structural schematic diagram illustrating a slurry making machine according to an embodiment of the present disclosure.

[0066] FIG. 4 is a structural schematic diagram illustrating a grinding machine according to an embodiment of the present disclosure.

[0067] FIG. 5 is a structural schematic diagram illustrating a material discharge component according to an embodiment of the present disclosure.

[0068] FIG. 6 is a structural schematic diagram illustrating a material storage bin according to an embodiment of the present disclosure.

[0069] FIG. 7 is a principle diagram illustrating a system for CO.sub.2 storage and utilization of a concrete mixing plant according to an embodiment of the present disclosure.

[0070] FIG. 8 shows a relational diagram of a grinding conductivity and a grinding time of a composite slurry under different conditions.

[0071] The numerals of the drawings are described below:

[0072] 1000. slurry making module, 1100. sand stone separating machine, 1200. sand removing machine, 1300. slurry making machine, 1301. machine body, 1302. slurry outlet, 1303. material-adding opening, 1304. first rotary shaft, 1305. first motor, 1306. rotary blade, 1307. bevel gear, 1308. weight measurement meter, 1309. display, 1310. first electronic valve, 2000. cyclic grinding module, 2100. grinding machine, 2101. cylinder body, 2102. material inlet, 2103. screen, 2104. sealed console, 2105. finished product bin, 2106. grinding bin, 2107. gas pipe, 2108. second motor, 2109. drive rotary rod, 2110. hollow rotary shaft, 2111. centrifugal blade, 2112. gas outlet, 2113. first material outlet, 2114. cooling cylinder, 2115. water inlet, 2116. water outlet, 2117. second electronic valve, 2118. strainer, 2119. third electronic valve, 2120. medium ball, 2200. material discharge component, 2201. slurry inlet, 2202. gas storage bin, 2203. slurry bin, 2204. gas relief opening, 2205. gas pressure meter, 2206. outlet end, 2207. U-shaped pipe, 2208. fourth electronic valve, 2300. CO2 circulating component, 3000. material storage and application module, 3100. material storage bin, 3101. feed pipe, 3102. second material outlet, 3103. rotational shaft, 3104. helical blade, 3200. mixing machine, and 4000. control module.

DESCRIPTION OF THE EMBODIMENTS

[0073] The end points and any values in the ranges disclosed in the present disclosure are not limited to the precise ranges or values and these ranges or values should be understood as including the values approaching these ranges or values. For the value ranges, combination may be performed on an interval between end point values of each range, an interval between an endpoint value and a separate point value of each range and an interval between separate point values to obtain one or more new value ranges and these value ranges should be deemed as specifically disclosed in the present disclosure.

[0074] The technical solutions of the present disclosure will be fully and clearly described below in combination with the specific embodiments of the present disclosure and the accompanying drawings of the specification. Apparently, the embodiments described herein are only some embodiments of the present disclosure rather than all embodiments. All other embodiments obtained by those skilled in the arts based on these embodiments of the present disclosure without carrying out creative work shall fall within the scope of protection of the present disclosure.

Embodiment 1

[0075] With reference to FIGS. 1 to 6, there is provided a system for CO.sub.2 storage and utilization of a concrete mixing plant, which includes a slurry making module 1000, a cyclic grinding module 2000, a material storage and application module 3000 and a control module 4000. The slurry making module 1000 is used to mix a concrete mixing plant waste slurry, a natural ore and an industrial aid to produce a composite slurry and convey the composite slurry to the cyclic grinding module 2000. The cyclic grinding module 2000 includes a grinding machine 2100, a material discharge component 2200 and a CO.sub.2 circulating component 2300. A mixing element is disposed inside the grinding machine 2100, and the mixing element includes a hollow rotary shaft 2110 and medium balls 2120. The material discharge component 2200 includes a gas storage bin 2202 and a slurry bin 2203 communicated with each other and disposed up and down. The gas storage bin 2202 is connected sequentially with the grinding machine 2100 and the CO.sub.2 circulating component 2300. The gas storage bin 2202 is configured to supply a gas containing CO.sub.2 to the CO.sub.2 circulating component 2300. The CO.sub.2 circulating component 2300 is configured to convey the gas to the grinding machine 2100 and recover a tail gas containing CO.sub.2 generated during a grinding process of the gas containing CO.sub.2 and the medium balls 2120 for the composite slurry in the grinding machine 2100. The grinding machine 2100 is configured to grind and prepare the composite slurry in the presence of the gas containing CO.sub.2 and the medium balls 2120 into a carbon-mineralized slurry and convey the carbon-mineralized slurry to the slurry bin 2203 of the material discharge component 2200. The material storage and application module 3000 includes a material storage bin 3100 and a mixing machine 3200 connected with each other, and the material storage bin 3100 is configured to receive and store the carbon-mineralized slurry from the slurry bin 2203, and the mixing machine 3200 is configured to mix and prepare the carbon-mineralized slurry into a commodity concrete. The control module 4000 is configured to control the slurry making module 1000, the cyclic grinding module 2000 and the material storage and application module 3000.

[0076] With reference to FIG. 2, the slurry making module 1000 includes a sand stone separating machine 1100, a sand removing machine 1200 and a slurry making machine 1300 connected sequentially. With reference to FIG. 3, the slurry making machine 1300 includes a machine body 1301, a slurry outlet 1302 at an outer side of the machine body 1301, a material-adding opening 1303 on a top of the machine body 1301, a first rotary shaft 1304 in a middle of the top of the machine body 1301 and a first motor 1305 on the top of the machine body 1301. Rotary blades 1306 are disposed at a lower end of the first rotary shaft 1304 and extended into the machine body 1301. An upper end of the first rotary shaft 1304 is connected with a drive part of the first motor 1305 through a bevel gear 1307. A weight measurement meter 1308 on which a display 1309 is disposed is further disposed at a bottom of the machine body 1301. A first electronic valve 1310 and a first feed pump are sequentially disposed on the slurry outlet 1302 of the slurry making machine 1300. The sand stone separating machine 1100 and the sand removing machine 1200 are used to perform sand stone separation on a waste slurry liquid produced in the processes such as waste concrete separation, equipment washing and site cleaning of production area and the like in a pre-mixed concrete manufacturer so as to obtain a mixed liquid containing more solid particles as a concrete mixing plant waste slurry.

[0077] With reference to FIG. 4, the grinding machine 2100 includes a cylinder body 2101, a

[0078] material inlet 2102 at a bottom of the cylinder body 2101, a screen 2103 in the cylinder body 2101, a sealed console 2104 on a top of the cylinder body 2101 and the mixing element in the sealed console 2104. The material inlet 2102 is connected with the slurry outlet 1302 of the slurry making machine 1300. The screen 2103 divides an interior of the cylinder body 2101 into an above-screen 2103 finished product bin 2105 and an under-screen 2103 grinding bin 2106. The medium balls 2120 are located in the grinding bin 2106, and a gas inlet provided with a gas pipe 2107 is opened on a top of the sealed console 2104. The mixing element further includes a second motor 2108 and a drive rotary rod 2109, and an output end of the second motor 2108 is fixedly connected with the drive rotary rod 2109. The drive rotary rod 2109 is fixedly connected with the hollow rotary shaft 2110, and a top of the hollow rotary shaft 2110 is connected with the gas pipe 2107. A lower end of the hollow rotary shaft 2110 extends to the grinding bin 2106. Centrifugal blades 2111 and uniformly-distributed gas outlets 2112 are disposed on the hollow rotary shaft 2110 in the grinding bin 2106. A first material outlet 2113 is disposed at an outer side of the finished product bin 2105. In order to control a temperature of the cylinder body, a cooling cylinder 2114 is disposed outside the cylinder body 2101, and a lower part and an upper part of the cooling cylinder 2114 are respectively provided with a water inlet 2115 and a water outlet 2116, so as to achieve temperature control through circulating water. A second electronic valve 2117 and a strainer 2118 are sequentially disposed on the material inlet 2102 of the grinding machine 2100, and the water inlet 2115 of the cooling cylinder 2114 is provided with a third electronic valve 2119. An inner bottom of the finished product bin 2105 of the grinding machine 2100 has an angle of inclination of 5 to 15.

[0079] With reference to FIG. 5, a slurry inlet 2201 is disposed at a side of the gas storage bin 2202 of the material discharge component 2200, the slurry inlet 2201 is connected with the first material outlet 2113 of the finished product bin 2105, and a gas relief opening 2204 and a gas pressure meter 2205 are disposed on a top of the gas storage bin 2202. The CO.sub.2 circulating component 2300 is provided with a circulating gas inlet and a circulating gas outlet, the gas relief opening 2204 of the gas storage bin 2202 is connected with the circulating gas inlet of the CO.sub.2 circulating component 2300, and the circulating gas outlet of the CO.sub.2 circulating component 2300 is connected with the gas inlet of the grinding machine 2100. An outlet end 2206 of the slurry bin 2203 of the material discharge component 2200 is connected with a U-shaped pipe 2207. A fourth electronic valve 2208 and a second feed pump are sequentially disposed on the U-shaped pipe 2207. The gas storage bin 2202 can capture CO.sub.2 (gas) from the atmosphere environment and store it or be connected with another equipment of gas containing CO.sub.2.

[0080] With reference to FIG. 6, a feed pipe 3101 connected with the U-shaped pipe 2207 is disposed at an upper end of an outer side of the material storage bin 3100, and a second material outlet 3102 connected with the mixing machine 3200 is disposed on a top of the material storage bin 3100. The second material outlet 3102 is provided with a third feed pump. A rotary bearing is disposed on an upper end and a lower end of an interior of the material storage bin 3100 respectively, the rotary bearing is connected with a rotational shaft 3103, and an end of the rotational shaft 3103 away from the rotary bearing is provided with helical blades 3104.

[0081] The control module 4000 is electrically connected with the first electronic valve 1310, the second electronic valve 2117, the third electronic valve 2119, the fourth electronic valve 2208, the first feed pump, the second feed pump, the third feed pump, the first motor 1305, the second motor 2108, the CO.sub.2 circulating component 2300, the sand stone separating machine 1100 and the sand removing machine 1200 respectively. The control module 4000 is selected as PLC.

[0082] FIG. 7 is a principle diagram illustrating a system for CO.sub.2 storage and utilization of a concrete mixing plant.

[0083] The method embodiments use the system for CO.sub.2 storage and utilization of the concrete mixing plant in the embodiment 1. In use of the system, when the pressure of the gas storage bin 2202 is equal to 0.18 MPa, the gas relief opening 2204 is opened, and the CO.sub.2 circulating component 2300 conveys a gas containing CO.sub.2 to the grinding machine 2100. When the pressure of the gas storage bin 2202 is greater than 0.25 MPa, the CO.sub.2 circulating component 2300 stops conveying the gas containing CO.sub.2. The pre-mixed concrete manufacturer performs, by using the sand stone separating machine 1100 and the sand removing machine 1200, treatment on a waste slurry liquid generated in the processes such as waste concrete separation, equipment washing and site cleaning of production area and the like so as to obtain the concrete mixing plant waste slurry. The masses of the concrete mixing plant waste slurry and the carbon-mineralized slurry each refer to an absolute dry mass, and the total mass ratio of CaO, MgO and FeO in the solid waste is 10%. These contents will not be repeated herein.

Embodiment 2

[0084] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0085] At step S1, 1 mass part of concrete mixing plant waste slurry, 65 mass parts of solid

[0086] waste and 0.132 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 3:1 and the fluidity is 160 mm.

[0087] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0088] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0089] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 2 m, a carbonization reaction degree is 80%, a solid-liquid ratio is 10:3, and the comprehensive power consumption is 60 kW.Math.h.

[0090] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 2.0%, the cement 11.4%, the mineral admixture 5.4%, the aggregate 73.9%, the water 6.7% and the water reducer 0.6%.

[0091] In the step S1, the solid waste is carbide slag, the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent and a suspending agent at a mass ratio of 1:0.1:0.1. The dispersing agent is obtained by mixing benzenesulfonic acid formaldehyde complex and coumarone resin sodium sulfonate at a mass ratio of 1:3, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether, and the suspending agent is lignin. In the steps S2 to S4, the feeding rate of the grinding process is 10 L/min, the grinding stay time is 40 min, and the grinding rate is 1000 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 1:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 400 L/min and a purity of 99.99%.

Embodiment 3

[0092] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0093] At step S1, 1 mass part of concrete mixing plant waste slurry, 65 mass parts of solid waste, 20 mass parts of natural ore, and 0.172 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 3:1 and the fluidity is 160 mm.

[0094] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0095] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0096] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 4 m, a carbonization reaction degree is 65%, a solid-liquid ratio is 4:1, and the comprehensive power consumption is 80 kW.Math.h.

[0097] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 12.5%, the cement 2.7%, the mineral admixture 3.5%, the aggregate 74.0%, the water 6.7% and the water reducer 0.6%.

[0098] In the step S1, the solid waste is steel slag, the natural ore is wollastonite, the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent and a suspending agent at a mass ratio of 1:0.1:0.1. The dispersing agent is obtained by mixing benzenesulfonic acid formaldehyde complex and coumarone resin sodium sulfonate at a mass ratio of 2:5, the defoaming agent is polyoxypropylene polyoxyethylene propylene glycol ether, and the suspending agent is obtained by mixing cellulose and lignin at a mass ratio of 1:2. In the steps S2 to S4, the feeding rate of the grinding process is 10 L/min, the grinding stay time is 40 min, and the grinding rate is 1000 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 1:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 1000 L/min and a purity of 99.99%.

Embodiment 4

[0099] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0100] At step S1, 1 mass part of concrete mixing plant waste slurry, 55 mass parts of solid waste, 15 mass parts of natural ore, and 0.106 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:1 and the fluidity is 200 mm.

[0101] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0102] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0103] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 2 m, a carbonization reaction degree is 80%, a solid-liquid ratio is 10:3, and the comprehensive power consumption is 60 kW.Math.h.

[0104] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 2.0%, the cement 2.5%, the mineral admixture 3.8%, the aggregate 83.0%, the water 7.7% and the water reducer 0.2%.

[0105] In the step S1, the solid waste is a mixture obtained by mixing steel slag and carbide slag at a mass ratio of 1:1, the natural ore is a mixture obtained by mixing wollastonite and olivine at a mass ratio of 1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent and a suspending agent at a mass ratio of 1:0.1:0.1. The dispersing agent is obtained by mixing benzenesulfonic acid formaldehyde complex and coumarone resin sodium sulfonate at a mass ratio of 1:5, the defoaming agent is polyoxypropylene polyoxyethylene monobutyl ether, and the suspending agent is obtained by mixing lignin and polyacrylic acid at a mass ratio of 2:3. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 10 min, and the grinding rate is 800 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 6:5. In the step S3, the gas containing CO.sub.2 has a conveying rate of 400 L/min and a purity of 99.99%.

Embodiment 5

[0106] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0107] At step S1, 1 mass part of concrete mixing plant waste slurry, 45 mass parts of solid waste, 10 mass parts of natural ore, and 0.056 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:2 and the fluidity is 240 mm.

[0108] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0109] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0110] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 8 m, a carbonization reaction degree is 35%, a solid-liquid ratio is 3:5, and the comprehensive power consumption is 18 kW.Math.h.

[0111] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 1.0%, the cement 5.0%, the mineral admixture 4.0%, the aggregate 83.0%, the water 6.8% and the water reducer 0.2%.

[0112] In the step S1, the solid waste is a mixture obtained by mixing steel slag, construction waste micropowder and magnesium slag at a mass ratio of 1:1:0.5, the natural ore is a mixture obtained by mixing wollastonite and talcum at a mass ratio of 1:1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent and a suspending agent at a mass ratio of 1:0.1:0.1. The dispersing agent is benzenesulfonic acid formaldehyde condensation compound, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether, and the suspending agent is cellulose. In the steps S2 to S4, the feeding rate of the grinding process is 30 L/min, the grinding stay time is 10 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 600 L/min and a purity of 99.99%.

Embodiment 6

[0113] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0114] At step S1, 1 mass part of concrete mixing plant waste slurry, 30 mass parts of solid waste, 5 mass parts of natural ore, and 0.018 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:3 and the fluidity is 240 mm.

[0115] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0116] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0117] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 8 m, a carbonization reaction degree is 20%, a solid-liquid ratio is 2:5, and the comprehensive power consumption is 16 kW.Math.h.

[0118] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 0.5%, the cement 5.7%, the mineral admixture 5.1%, the aggregate 82.0%, the water 6.4% and the water reducer 0.3%.

[0119] In the step S1, the solid waste is a mixture obtained by mixing steel slag, construction waste micropowder and magnesium slag at a mass ratio of 1:1:0.5, the natural ore is a mixture obtained by mixing wollastonite and talcum at a mass ratio of 1:1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent and a suspending agent at a mass ratio of 1:0.1:0.1. The dispersing agent is benzenesulfonic acid formaldehyde condensation compound, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether, and the suspending agent is cellulose. In the steps S2 to S4, the feeding rate of the grinding process is 40 L/min, the grinding stay time is 10 min, and the grinding rate is 400 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 4:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 7

[0120] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0121] At step S1, 1 mass part of concrete mixing plant waste slurry, 15 mass parts of solid waste, and 0.008 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:4 and the fluidity is 280 mm.

[0122] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0123] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0124] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 8 m, a carbonization reaction degree is 40%, a solid-liquid ratio is 3:10, and the comprehensive power consumption is 16 kW.Math.h.

[0125] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 0.5%, the cement 8.4%, the mineral admixture 5.6%, the aggregate 78.5%, the water 6.7% and the water reducer 0.3%.

[0126] In the step S1, the solid waste is a mixture obtained by mixing steel slag, construction waste micropowder and biomass ash at a mass ratio of 1:1:0.5, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent and a suspending agent at a mass ratio of 1:0.1:0.1. The dispersing agent is benzenesulfonic acid formaldehyde complex, the defoaming agent is polyoxypropylene polyoxyethylene monobutyl ether, and the suspending agent is lignin. In the steps S2 to S4, the feeding rate of the grinding process is 50 L/min, the grinding stay time is 10 min, and the grinding rate is 150 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 5:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 8

[0127] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0128] At step S1, 1 mass part of concrete mixing plant waste slurry, 30 mass parts of solid waste, 5 mass parts of natural ore and 0.018 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 3:17 and the fluidity is 280 mm.

[0129] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0130] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0131] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 8 m, a carbonization reaction degree is 10%, a solid-liquid ratio is 2:11, and the comprehensive power consumption is 16 kW.Math.h.

[0132] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 0.5%, the cement 9.1%, the mineral admixture 6.3%, the aggregate 77.1%, the water 6.7% and the water reducer 0.3%.

[0133] In the step S1, the solid waste is a mixture obtained by mixing construction waste micropowder and kiln dust at a mass ratio of 1:1, the natural ore is a mixture obtained by mixing wollastonite, olivine and pyroxene at a mass ratio of 1:1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent and a suspending agent at a mass ratio of 1:0.1:0.1. The dispersing agent is benzenesulfonic acid formaldehyde condensation compound, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether, and the suspending agent is sodium polyacrylate. In the steps S2 to S4, the feeding rate of the grinding process is 50 L/min, the grinding stay time is 10 min, and the grinding rate is 400 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 600 L/min and a purity of 99.99%.

Embodiment 9

[0134] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0135] At step S1, 1 mass part of concrete mixing plant waste slurry, 30 mass parts of solid waste, 5 mass parts of natural ore and 0.018 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:2 and the fluidity is 240 mm.

[0136] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0137] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0138] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 6 m, a carbonization reaction degree is 25%, a solid-liquid ratio is 2:3, and the comprehensive power consumption is 12 kW.Math.h.

[0139] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 1.0%, the cement 10.1%, the mineral admixture 6.4%, the aggregate 75.4%, the water 6.7% and the water reducer 0.4%.

[0140] In the step S1, the solid waste is a mixture obtained by mixing construction waste micropowder and municipal waste incineration ash at a mass ratio of 1:1, the natural ore is a mixture obtained by mixing wollastonite, olivine, pyroxene and feldspar at a mass ratio of 1:1:1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent and a suspending agent at a mass ratio of 1:0.1:0.1. The dispersing agent is benzenesulfonic acid formaldehyde condensation compound, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether, and the suspending agent is cellulose. In the steps S2 to S4, the feeding rate of the grinding process is 50 L/min, the grinding stay time is 10 min, and the grinding rate is 400 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 10

[0141] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0142] At step S1, 1 mass part of concrete mixing plant waste slurry, 15 mass parts of solid waste, 20 mass parts of natural ore and 0.054 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 3:17 and the fluidity is 280 mm.

[0143] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0144] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0145] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 3 m, a carbonization reaction degree is 50%, a solid-liquid ratio is 5:24, and the comprehensive power consumption is 80 kW.Math.h.

[0146] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 0.5%, the cement 11.3%, the mineral admixture 6.9%, the aggregate 74.1%, the water 6.7% and the water reducer 0.5%.

[0147] In the step S1, the solid waste is blast furnace slag, the natural ore is wollastonite, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent and a suspending agent at a mass ratio of 1:0.1:0.1. The dispersing agent is benzenesulfonic acid formaldehyde condensation compound, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether, and the suspending agent is cellulose. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 40 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 11

[0148] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0149] At step S1, 1 mass part of concrete mixing plant waste slurry, 15 mass parts of solid waste, 20 mass parts of natural ore and 0.054 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:2 and the fluidity is 200 mm.

[0150] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0151] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0152] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 6 m, a carbonization reaction degree is 25%, a solid-liquid ratio is 7:13, and the comprehensive power consumption is 48 kW.Math.h.

[0153] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 0.5%, the cement 15.0%, the mineral admixture 7.5%, the aggregate 70.3%, the water 6.2% and the water reducer 0.5%.

[0154] In the step S1, the solid waste is high calcium fly ash, the natural ore is a mixture obtained by mixing wollastonite and olivine at a mass ratio of 1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, a suspending agent, a chelating agent, and a solubilizing agent at a mass ratio of 1:0.1:0.1:0.2:0.2. The dispersing agent is benzenesulfonic acid formaldehyde condensation compound, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether, the suspending agent is cellulose, the chelating agent is ethylene diamine tetraacetic acid disodium, and the solubilizing agent is polypropyleneimine. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 20 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 12

[0155] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0156] At step S1, 1 mass part of concrete mixing plant waste slurry, 15 mass parts of solid waste, 20 mass parts of natural ore and 0.054 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 2:1 and the fluidity is 180 mm.

[0157] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0158] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0159] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 2 m, a carbonization reaction degree is 80%, a solid-liquid ratio is 10:3, and the comprehensive power consumption is 60 kW.Math.h.

[0160] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 10.2%, the cement 4.0%, the mineral admixture 6.5%, the aggregate 72.4%, the water 6.3% and the water reducer 0.6%.

[0161] In the step S1, the solid waste is electric furnace slag, the natural ore is a mixture obtained by mixing wollastonite and serpentine at a mass ratio of 1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, a suspending agent, a chelating agent, and a solubilizing agent at a mass ratio of 1:0.1:0.1:0.2:0.2. The dispersing agent is benzenesulfonic acid formaldehyde condensation compound, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether, the suspending agent is cellulose, the chelating agent is ethylene diamine tetraacetic acid disodium, and the solubilizing agent is polypropyleneimine. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 20 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the and a purity of 99.99%.

Embodiment 13

[0162] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0163] At step S1, 1 mass part of concrete mixing plant waste slurry, 10 mass parts of solid waste, 10 mass parts of natural ore and 0.021 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:1 and the fluidity is 200 mm.

[0164] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0165] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0166] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 6 m, a carbonization reaction degree is 30%, a solid-liquid ratio is 2:1, and the comprehensive power consumption is 45 kW.Math.h.

[0167] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 6.0%, the cement 6.3%, the mineral admixture 6.4%, the aggregate 74.1%, the water 6.7% and the water reducer 0.5%.

[0168] In the step S1, the solid waste is a mixture obtained by mixing blast furnace slag and high calcium fly ash at a mass ratio of 1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, a suspending agent, a chelating agent, and a solubilizing agent at a mass ratio of 1:0.1:0.1:0.2:0.2. The dispersing agent is coumarone resin sodium sulfonate, the defoaming agent is polyoxypropylene polyoxyethylene monobutyl ether, the suspending agent is polyacrylic acid, the chelating agent is ethylene diamine tetraacetic acid, and the solubilizing agent is nitratoethanolamine. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 20 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 14

[0169] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0170] At step S1, 1 mass part of concrete mixing plant waste slurry, 15 mass parts of solid waste, and 0.016 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:2 and the fluidity is 200 mm.

[0171] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0172] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0173] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 6 m, a carbonization reaction degree is 30%, a solid-liquid ratio is 7:13, and the comprehensive power consumption is 38 kW.Math.h.

[0174] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 1.0%, the cement 10.1%, the mineral admixture 6.4%, the aggregate 75.4%, the water 6.7% and the water reducer 0.4%.

[0175] In the step S1, the solid waste is a mixture obtained by mixing blast furnace slag, high calcium fly ash and electric furnace slag at a mass ratio of 1:1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, a suspending agent, a chelating agent, and a solubilizing agent at a mass ratio of 1:0.1:0.1:0.2:0.2. The dispersing agent is coumarone resin sodium sulfonate, the defoaming agent is polyoxypropylene polyoxyethylene monobutyl ether, the suspending agent is polyacrylic acid, the chelating agent is ethylene diamine tetraacetic acid, and the solubilizing agent is nitratoethanolamine. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 20 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 15

[0176] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0177] At step S1, 1 mass part of concrete mixing plant waste slurry, 15 mass parts of solid waste, and 0.016 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:2 and the fluidity is 200 mm.

[0178] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0179] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0180] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 6 m, a carbonization reaction degree is 40%, a solid-liquid ratio is 3:5, and the comprehensive power consumption is 36 kW.Math.h.

[0181] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an ordinary concrete, where the ordinary concrete, by mass percent, includes the carbon-mineralized slurry 1.0%, the cement 14.2%, the mineral admixture 6.7%, the aggregate 71.0%, the water 6.3% and the water reducer 0.8%.

[0182] In the step S1, the solid waste is a mixture obtained by mixing blast furnace slag and steel slag at a mass ratio of 1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, a suspending agent, a neutralizing agent, a chelating agent, and a solubilizing agent at a mass ratio of 1:0.1:0.1:0.2:0.2:0.2. The dispersing agent is coumarone resin sodium sulfonate, the defoaming agent is polyoxypropylene polyoxyethylene monobutyl ether, the suspending agent is polyacrylic acid, neutralizing agent is sulfamic acid, the chelating agent is ethylene diamine tetraacetic acid, and the solubilizing agent is nitratoethanolamine. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 20 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 16

[0183] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0184] At step S1, 1 mass part of concrete mixing plant waste slurry, 15 mass parts of solid waste, and 0.016 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:2 and the fluidity is 160 mm.

[0185] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0186] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0187] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 1 m, a carbonization reaction degree is 65%, a solid-liquid ratio is 3:5, and the comprehensive power consumption is 80 kW.Math.h.

[0188] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an underwater concrete, where the underwater concrete, by mass percent, includes the carbon-mineralized slurry 1.5%, the cement 10.0%, the mineral admixture 6.0%, the aggregate 75.9%, the water 6.2% and the water reducer 0.4%.

[0189] In the step S1, the solid waste is a mixture obtained by mixing blast furnace slag and steel slag at a mass ratio of 1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, a suspending agent and a neutralizing agent at a mass ratio of 1:0.1:0.1:0.2. The dispersing agent is a mixture obtained by mixing benzenesulfonic acid formaldehyde complex and coumarone resin sodium sulfonate at a mass ratio of 1:3, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether, the suspending agent is lignin, and the neutralizing agent is glycine. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 40 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 17

[0190] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0191] At step S1, 1 mass part of concrete mixing plant waste slurry, 15 mass parts of solid waste, and 0.016 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:2 and the fluidity is 160 mm.

[0192] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0193] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0194] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 1 m, a carbonization reaction degree is 65%, a solid-liquid ratio is 3:5, and the comprehensive power consumption is 80 kW.Math.h.

[0195] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an underwater concrete, where the underwater concrete, by mass percent, includes the carbon-mineralized slurry 1.8%, the cement 13.4%, the mineral admixture 5.0%, the aggregate 73.0%, the water 6.3% and the water reducer 0.5%.

[0196] In the step S1, the solid waste is a mixture obtained by mixing blast furnace slag and steel slag at a mass ratio of 1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, a suspending agent and a neutralizing agent at a mass ratio of 1:0.1:0.1:0.2. The dispersing agent is a mixture obtained by mixing benzenesulfonic acid formaldehyde complex and coumarone resin sodium sulfonate at a mass ratio of 1:3, the defoaming agent is polyoxypropylene polyoxyethylene monobutyl ether, the suspending agent is lignin, and the neutralizing agent is glycine. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 40 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 18

[0197] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0198] At step S1, 1 mass part of concrete mixing plant waste slurry, 15 mass parts of solid waste, and 0.016 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:2 and the fluidity is 160 mm.

[0199] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0200] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0201] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 1 m, a carbonization reaction degree is 65%, a solid-liquid ratio is 3:5, and the comprehensive power consumption is 80 kW.Math.h.

[0202] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an underwater concrete, where the underwater concrete, by mass percent, includes the carbon-mineralized slurry 2.0%, the cement 15.0%, the mineral admixture 4.5%, the aggregate 71.5%, the water 6.4% and the water reducer 0.6%.

[0203] In the step S1, the solid waste is a mixture obtained by mixing blast furnace slag and steel slag at a mass ratio of 1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, a suspending agent and a neutralizing agent at a mass ratio of 1:0.1:0.1:0.2. The dispersing agent is a mixture obtained by mixing benzenesulfonic acid formaldehyde complex and coumarone resin sodium sulfonate at a mass ratio of 1:3, the defoaming agent is polyoxypropylene polyoxyethylene propylene glycol ether, the suspending agent is lignin, and the neutralizing agent is glycine. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 40 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 19

[0204] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0205] At step S1, 1 mass part of concrete mixing plant waste slurry, 30 mass parts of solid waste, and 0.0155 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:3 and the fluidity is 280 mm.

[0206] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0207] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0208] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 10 m, a carbonization reaction degree is 35%, a solid-liquid ratio is 11:10, and the comprehensive power consumption is 20 kW.Math.h.

[0209] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain a fine aggregate concrete, where the fine aggregate concrete, by mass percent, includes the carbon-mineralized slurry 0.5%, the cement 2.5%, the mineral admixture 5.2%, the aggregate 83.8%, the water 7.7% and the water reducer 0.3%.

[0210] In the step S1, the solid waste is carbide slag, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, and a suspending agent at a mass ratio of 1:0.1:0.1. The dispersing agent is a mixture obtained by mixing benzenesulfonic acid formaldehyde complex and coumarone resin sodium sulfonate at a mass ratio of 1:3, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether, and the suspending agent is lignin. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 10 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 20

[0211] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0212] At step S1, 1 mass part of concrete mixing plant waste slurry, 30 mass parts of solid waste, and 0.0155 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:3 and the fluidity is 280 mm.

[0213] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0214] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0215] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 15 m, a carbonization reaction degree is 20%, a solid-liquid ratio is 13:25, and the comprehensive power consumption is 20 kW.Math.h.

[0216] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain a fine aggregate concrete, where the fine aggregate concrete, by mass percent, includes the carbon-mineralized slurry 0.8%, the cement 5.6%, the mineral admixture 4.5%, the aggregate 81.2%, the water 7.5% and the water reducer 0.4%.

[0217] In the step S1, the solid waste is steel slag, and the industrial aid is a mixture obtained

[0218] by mixing a dispersing agent, a defoaming agent, and a suspending agent at a mass ratio of 1:0.1:0.1. The dispersing agent is a mixture obtained by mixing benzenesulfonic acid formaldehyde complex and coumarone resin sodium sulfonate at a mass ratio of 1:3, the defoaming agent is polyoxypropylene polyoxyethylene propylene glycol ether, and the suspending agent is lignin. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 10 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the and a purity of 99.99%.

Embodiment 21

[0219] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0220] At step S1, 1 mass part of concrete mixing plant waste slurry, 30 mass parts of solid waste, and 0.0155 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:3 and the fluidity is 280 mm.

[0221] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0222] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0223] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 20 m, a carbonization reaction degree is 25%, a solid-liquid ratio is 13:25, and the comprehensive power consumption is 18 kW.Math.h.

[0224] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain a fine aggregate concrete, where the fine aggregate concrete, by mass percent, includes the carbon-mineralized slurry 1.0%, the cement 8.1%, the mineral admixture 3.5%, the aggregate 80.1%, the water 6.8% and the water reducer 0.5%.

[0225] In the step S1, the solid waste is a mixture obtained by mixing steel slag and carbide slag at a mass ratio of 1:1, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, and a suspending agent at a mass ratio of 1:0.1:0.1. The dispersing agent is a mixture obtained by mixing benzenesulfonic acid formaldehyde complex and coumarone resin sodium sulfonate at a mass ratio of 1:3, the defoaming agent is polyoxypropylene polyoxyethylene monobutyl ether, and the suspending agent is cellulose. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 10 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 22

[0226] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0227] At step S1, 1 mass part of concrete mixing plant waste slurry, 15 mass parts of solid waste, and 0.032 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:2 and the fluidity is 200 mm.

[0228] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0229] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0230] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 4 m, a carbonization reaction degree is 40%, a solid-liquid ratio is 3:5, and the comprehensive power consumption is 65 kW.Math.h.

[0231] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an impermeable concrete, where the impermeable concrete, by mass percent, includes the carbon-mineralized slurry 0.7%, the cement 14.2%, the mineral admixture 7.5%, the aggregate 70.3%, the water 6.5% and the water reducer 0.8%.

[0232] In the step S1, the solid waste is blast furnace slag, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, a suspending agent, a neutralizing agent, a chelating agent and a solubilizing agent at a mass ratio of 1:0.1:0.1:0.2:0.1:0.1. The dispersing agent is a mixture obtained by mixing benzenesulfonic acid formaldehyde complex and coumarone resin sodium sulfonate at a mass ratio of 1:3, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether, the suspending agent is lignin, the neutralizing agent is glycine, the chelating agent is ethylene diamine tetraacetic acid, and the solubilizing agent is polypropyleneimine. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 30 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 23

[0233] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0234] At step S1, 1 mass part of concrete mixing plant waste slurry, 15 mass parts of solid waste, and 0.032 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:2 and the fluidity is 200 mm.

[0235] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0236] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0237] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 5 m, a carbonization reaction degree is 30%, a solid-liquid ratio is 3:5, and the comprehensive power consumption is 60 kW.Math.h.

[0238] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an impermeable concrete, where the impermeable concrete, by mass percent, includes the carbon-mineralized slurry 1.5%, the cement 10.4%, the mineral admixture 5.3%, the aggregate 75.8%, the water 6.3% and the water reducer 0.7%.

[0239] In the step S1, the solid waste is carbide slag, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent and a suspending agent at a mass ratio of 1:0.1:0.1. The dispersing agent is benzenesulfonic acid formaldehyde condensation compound, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether, and the suspending agent is cellulose. In the steps S2 to S4, the feeding rate of the grinding process is 10 L/min, the grinding stay time is 40 min, and the grinding rate is 1000 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 1:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 24

[0240] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0241] At step S1, 1 mass part of concrete mixing plant waste slurry, 15 mass parts of solid waste, and 0.032 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:2 and the fluidity is 200 mm.

[0242] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0243] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0244] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 4 m, a carbonization reaction degree is 35%, a solid-liquid ratio is 3:5, and the comprehensive power consumption is 55 kW.Math.h.

[0245] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain an impermeable concrete, where the impermeable concrete, by mass percent, includes the carbon-mineralized slurry 2.0%, the cement 4.3%, the mineral admixture 3.6%, the aggregate 83.7%, the water 6.2% and the water reducer 0.2%.

[0246] In the step S1, the solid waste is high calcium fly ash, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, a suspending agent, a neutralizing agent, a chelating agent and a solubilizing agent at a mass ratio of 1:0.1:0.1:0.2:0.1:0.1. The dispersing agent is a mixture obtained by mixing benzenesulfonic acid formaldehyde complex and coumaronee resin sodium sulfonate at a mass ratio of 1:3, the defoaming agent is polyoxypropylene polyoxyethylene propylene glycol ether mixed at a mass ratio of 1:3, the suspending agent is lignin, the neutralizing agent is glycine, the chelating agent is ethylene diamine tetraacetic acid, and the solubilizing agent is polypropyleneimine. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 30 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

Embodiment 25

[0247] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0248] At step S1, 1 mass part of concrete mixing plant waste slurry, 30 mass parts of solid waste, and 0.0155 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:2 and the fluidity is 200 mm.

[0249] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0250] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0251] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 8 m, a carbonization reaction degree is 45%, a solid-liquid ratio is 5:9, and the comprehensive power consumption is 25 kW.Math.h.

[0252] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain a road concrete, where the road concrete, by mass percent, includes the carbon-mineralized slurry 0.5%, the cement 2.5%, the mineral admixture 5.3%, the aggregate 83.8%, the water 7.7% and the water reducer 0.2%.

[0253] In the step S1, the solid waste is a mixture obtained by mixing steel slag, construction waste micropowder, and magnesium slag at a mass ratio of 1:1:0.5, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, a suspending agent, a neutralizing agent, a chelating agent, a solubilizing agent and a nucleating agent at a mass ratio of 1:0.1:0.1:0.2:0.1:0.1:0.2. The dispersing agent is a mixture obtained by mixing benzenesulfonic acid formaldehyde complex and coumaronee resin sodium sulfonate at a mass ratio of 1:3, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether mixed at a mass ratio of 1:3, the suspending agent is lignin, the neutralizing agent is glycine, the chelating agent is ethylene diamine tetraacetic acid, the solubilizing agent is polypropyleneimine and the nucleating agent is triethanolamine. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 20 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the and a purity of 99.99%.

Embodiment 26

[0254] There is a method of CO.sub.2 storage and utilization of a concrete mixing plant, which includes the following steps.

[0255] At step S1, 1 mass part of concrete mixing plant waste slurry, 30 mass parts of solid waste, and 0.0155 mass parts of industrial aid are mixed in the slurry making machine to obtain a composite slurry, where the solid-liquid ratio of the composite slurry is 1:2 and the fluidity is 200 mm.

[0256] At step S2, the composite slurry is pumped into the grinding machine and ground in the presence of the medium balls, and at this time, the fourth electronic valve is closed.

[0257] At step S3, after the slurry bin is filled up, the grinding machine is sealed, and the fourth electronic valve is opened; the CO.sub.2 circulating component is used to convey the gas containing CO.sub.2 in the gas storage bin to the grinding machine such that the composite slurry undergoes grinding reaction in the presence of the gas containing CO.sub.2 and the medium balls and is prepared into a carbon-mineralized slurry.

[0258] At step S4, the step S3 is repeated to cyclically use the gas containing CO.sub.2 until the content of the CO.sub.2 is lower than 5%. In this case, the gas storage bin provides new gas containing CO.sub.2 for grinding reaction so as to realize continuous production of the carbon-mineralized slurry, where a mean particle size of the carbon-mineralized slurry is 8 m, a carbonization reaction degree is 45%, a solid-liquid ratio is 5:9, and the comprehensive power consumption is 25 kW.Math.h.

[0259] At step S5, after an aggregate is added into the mixing machine, the material storage bin conveys the carbon-mineralized slurry into the mixing machine, and then a mineral admixture, a cement, water, a carbon-mineralized slurry, and a water reducer are added and mixed for 50 s to obtain a road concrete, where the road concrete, by mass percent, includes the carbon-mineralized slurry 1.0%, the cement 7.9%, the mineral admixture 3.5%, the aggregate 80.3%, the water 6.8% and the water reducer 0.5%.

[0260] In the step S1, the solid waste is a mixture obtained by mixing steel slag, construction waste micropowder, and magnesium slag at a mass ratio of 1:1:0.5, and the industrial aid is a mixture obtained by mixing a dispersing agent, a defoaming agent, a suspending agent, a neutralizing agent, a chelating agent, a solubilizing agent and a nucleating agent at a mass ratio of 1:0.1:0.1:0.2:0.1:0.1:0.2. The dispersing agent is a mixture obtained by mixing benzenesulfonic acid formaldehyde complex and coumaronee resin sodium sulfonate at a mass ratio of 1:3, the defoaming agent is polyoxypropylene polyoxyethylene propyl glycerol ether, the suspending agent is lignin, the neutralizing agent is glycine, the chelating agent is ethylene diamine tetraacetic acid, the solubilizing agent is polypropyleneimine and the nucleating agent is triethanolamine. In the steps S2 to S4, the feeding rate of the grinding process is 20 L/min, the grinding stay time is 20 min, and the grinding rate is 600 r/min. There are medium balls in the grinding bin of the grinding machine, and a ball-material ratio of the medium balls to the composite slurry is 3:1. In the step S3, the gas containing CO.sub.2 has a conveying rate of 800 L/min and a purity of 99.99%.

[0261] In order to further describe the principle of the present disclosure, 1 mass part of concrete mixing plant waste slurry, 65 mass parts of solid waste (steel slag, construction waste micropowder and biomass ash at a mass ratio of 1:1:0.5) are mixed in the slurry making machine to produce a composite slurry, where the solid-liquid ratio of the composite slurry is 1:3 and the fluidity is 240 mm. Next, the composite slurry is conveyed into the grinding machine and ground or not ground with introduction of CO.sub.2, and ground or not ground without introduction of CO.sub.2. The mineralization reaction rate under various cases is determined by testing a conductivity. Within a given period of time, the more obvious decrease of the conductivity means faster mineralization reaction, with results shown in FIG. 8. In the FIG., T-0r: CO.sub.2 is introduced, grinding is not performed and the ball-material ratio of the medium balls to the composite slurry is 1:1; N-500r: CO.sub.2 is not introduced, the rotation speed is 500 rpm, and the ball-material ratio of the medium balls to the composite slurry is 1:1; T-300r-1: CO.sub.2 is introduced, the rotation speed is 300 rpm, and the ball-material ratio of the medium balls to the composite slurry is 1:1; T-300r-1: CO.sub.2 is introduced, the rotation speed is 300 rpm, and the ball-material ratio of the medium balls to the composite slurry is 1:1; T-500r-1: CO.sub.2 is introduced, the rotation speed is 500 rpm, and the ball-material ratio of the medium balls to the composite slurry is 1:1; T-700r-1: CO.sub.2 is introduced, the rotation speed is 700 rpm, and the ball-material ratio of the medium balls to the composite slurry is 1:1; T-500r-2: CO.sub.2 is introduced, the rotation speed is 500 rpm, and the ball-material ratio of the medium balls to the composite slurry is 2:1; T-500r-3: CO.sub.2 is introduced, the rotation speed is 500 rpm, and the ball-material ratio of the medium balls to the composite slurry is 3:1. It can be seen from FIG. 8 that only when the grinding is performed with introduction of CO.sub.2 in the presence of the medium balls can shorten the carbonization time of the mineralization reaction, because the rotary mechanical stirring provides hydrodynamic cavitation conditions. At the time of collapse of the cavitation bubbles, high-speed microjets and impact waves can be generated, which causes extreme turbulences and mechanical shear effect to be more favorable for particle refining. Further, by a liquid phase grinding mechanical force, the surfaces of the solid waste particles are continuously peeled and the diffusion rate of the CO.sub.2 and Ca.sup.2+ is increased by chemical solubilizing components, so as to fully release the carbonization potential of the solid wastes. Moreover, by controlling the proper ball-material ratio and the grinding speed, the time of mineralization reaction can be further optimized.

[0262] Finally, it should be noted that the above descriptions are only about preferred embodiments of the present disclosure and shall not be intended to limit the present disclosure. Although the present disclosure has been detailed by referring the preceding embodiments, those skilled in the arts understand that they still can make modifications to the technical solutions recorded in the embodiments of the present disclosure or make equivalent replacements to part of the technical features therein. Any modifications, equivalent substitutions and improvements and the like made within the spirit and principle of the present disclosure shall all fall within the scope of protection of the present disclosure.