ADDITIVE FOR INCREASING EARLY ACTIVITY INDEX OF NICKEL SLAG AND PREPARATION METHOD THEREOF

Abstract

An additive for increasing an early activity index of nickel slag and a preparation method thereof, belonging to the field of additive technologies, are provided. The preparation method includes: successively adding maleic anhydride and triethanolamine to a reactor; setting the heating temperature to 50 C. for reaction, where a large amount of heat is released during the reaction; when the reaction temperature decreases to 60 C. after heat is released in the reaction, allowing triethanolamine maleate to react with a solution of bromine in carbon tetrachloride; adding water to the mixture, where the weight percentage content of the added water is 60%; separating and removing carbon tetrachloride from water; and conducting uniform stirring to obtain the additive. A molar ratio of the maleic anhydride, the triethanolamine, and bromine is (0.2-1):1:(0.2-1), and a molar ratio of the maleic anhydride to the bromine is 1:1.

Claims

1. A preparation method of an additive for increasing an early activity index of nickel slag, comprising the following steps: successively adding maleic anhydride and triethanolamine to a reactor; setting the heating temperature to 50 C. for reaction, wherein a large amount of heat is released during the reaction; when the reaction temperature decreases to 60 C. after heat is released in the reaction, allowing triethanolamine maleate to react with a solution of bromine in carbon tetrachloride; adding water to the mixture, wherein the weight percentage content of the added water is 60%; separating and removing carbon tetrachloride from water; and conducting uniform stirring to obtain the additive, wherein a molar ratio of the maleic anhydride, the triethanolamine, and bromine is (0.2-1):1:(0.2-1), and a molar ratio of the maleic anhydride to the bromine is 1:1.

2. The preparation method according to claim 1, wherein the molar ratio of the maleic anhydride, the triethanolamine, and the bromine is 0.8:1:0.8.

3. An additive prepared by using the preparation method according to claim 1.

4. Use of an additive prepared by using the preparation method according to claim 1, wherein the additive is used to increase an early activity index of nickel slag.

5. An additive prepared by using the preparation method according to claim 2.

6. Use of an additive prepared by using the preparation method according to claim 2, wherein the additive is used to increase an early activity index of nickel slag.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0012] FIG. 1 is an XRD pattern of components of nickel slag.

DETAILED DESCRIPTION

[0013] To further elaborate the technical means for achieving the intended objective and effects thereof in the present invention, detailed description about the present invention is further provided below with reference to embodiments and application cases, but this is not intended to limit the present invention.

Embodiment 1

[0014] 1 mol of triethanolamine and 0.2 mol of maleic anhydride were added to a reactor; the heating temperature was set to 50 C.; when the reaction temperature decreases to 60 C. after a large amount of heat is released in the reaction, triethanolamine maleate was allowed to react with 0.2 mol of a solution of bromine in carbon tetrachloride; water (with the weight percentage content of 60%) was added to the mixture; carbon tetrachloride was separated from water; and the obtained solution was uniformly stirred.

Embodiment 2

[0015] 1 mol of triethanolamine and 0.4 mol of maleic anhydride were added to a reactor; the heating temperature was set to 50 C.; when the reaction temperature decreases to 60 C. after a large amount of heat is released in the reaction, triethanolamine maleate was allowed to react with 0.4 mol of a solution of bromine in carbon tetrachloride; water (with the weight percentage content of 60%) was added to the mixture; carbon tetrachloride was separated from water; and the obtained solution was uniformly stirred.

Embodiment 3

[0016] 1 mol of triethanolamine and 0.6 mol of maleic anhydride were added to a reactor; the heating temperature was set to 50 C.; when the reaction temperature decreases to 60 C. after a large amount of heat is released in the reaction, triethanolamine maleate was allowed to react with 0.6 mol of a solution of bromine in carbon tetrachloride; water (with the weight percentage content of 60%) was added to the mixture; carbon tetrachloride was separated from water; and the obtained solution was uniformly stirred.

Embodiment 4

[0017] 1 mol of triethanolamine and 0.8 mol of maleic anhydride were added to a reactor; the heating temperature was set to 50 C.; when the reaction temperature decreases to 60 C. after a large amount of heat is released in the reaction, triethanolamine maleate was allowed to react with 0.8 mol of a solution of bromine in carbon tetrachloride; water accounting for 60% of the mass of the total system was added to the mixture; carbon tetrachloride was separated from water; and the obtained solution was uniformly stirred.

Embodiment 5

[0018] 1 mol of triethanolamine and 1 mol of maleic anhydride were added to a reactor; the heating temperature was set to 50 C.; when the reaction temperature decreases to 60 C. after a large amount of heat is released in the reaction, triethanolamine maleate was allowed to react with 1 mol of a solution of bromine in carbon tetrachloride; water (with the weight percentage content of 60%) was added to the mixture; carbon tetrachloride was separated from water; and the obtained solution was uniformly stirred.

Embodiment 6

[0019] Components of nickel slag selected for use are shown in FIG. 1. To determine an effect of the present invention, a nickel slag-containing cement base was prepared, and the additives prepared in Embodiments 1, 2, 3, 4, and 5 were separately added. According to the national standard for strength test for cement mortar and GB/T 12957-2005 Test method for activity of industrial waste slag used as addition to cement, a dosage of the nickel slag was 30% of the mass of cement clinker, and a dosage of each of the additives prepared in the present invention was 0.02% of the mass of the nickel slag. After seven days of standard curing, the strength of the nickel slag-containing cement base was tested and activity indexes thereof were calculated. Obtained results are shown in Table 1:

[0020] Components of nickel slag selected for use are shown in FIG. 1. Obtained results of activity indexes of the slag are shown in Table 1:

TABLE-US-00001 TABLE 1 Results (wt %) of the impact of the additives prepared in the present invention on activity indexes of the nickel slag Increased quantity of Early activity early activity Additive Dosage (7 d) (7 d) None 47 Embodiment 1 0.02 71 24 Embodiment 2 0.02 73 26 Embodiment 3 0.02 75 25 Embodiment 4 0.02 76 29 Embodiment 5 0.02 69 22

[0021] It can be seen from Table 1, the additives prepared in Embodiments 1, 2, 3, 4, and 5 all increase a 7 d activity index of the nickel slag, among which the 7 d activity index can be increased by a maximum of 29%. Triethanolamine maleate can obviously affect an early activity index of the nickel slag, and effectively activate the hydration activity of the nickel slag.