A new integrated method to capture polluted CO.sub.2 using CaO produced from phosphogypsum calcination using sulfur as non-CO.sub.2 fuel where (1) both pollutants of phosphogypsum and CO.sub.2 are transformed into environmentally neutral or useful products such as limestone or clinker and sulfuric acid; (2) low-CO.sub.2 CaO produced from calcination of phosphogypsum with sulfur as fuel can be used to produce low-CO.sub.2 clinker that replaces the use of high-CO.sub.2 limestone as raw material; (3) the use of sulfur as fuel to calcine phosphogypsum allows the production of low-cost sulfuric acid.

A manufacturing process of a concrete product includes: (1) extracting calcium from solids as portlandite; (2) forming a cementitious slurry including the portlandite; (3) shaping the cementitious slurry into a structural component; and (4) exposing the structural component to carbon dioxide sourced from a flue gas stream, thereby forming the concrete product.

A method for manufacturing concrete parts has the steps of: providing a hydraulic cement and aggregate; mixing the cement and aggregate with water to provide a fresh concrete; introducing CO.sub.2 into the fresh concrete in an amount resulting in a carbonation degree of more than 0.5 wt.-% and less than 5 wt.-% of the total carbonatable Ca and Mg phases for a first carbonation step; curing the fresh concrete until at least 15 wt.-% of the calcium aluminates are hydrated to provide a green concrete part; subjecting the green concrete part to CO.sub.2 in an amount resulting in a carbonation degree of more than 10 wt.-% of the total carbonatable Ca and Mg phases for a final carbonation step; and storing the part for 0.5 hours to 28 days for further hydration of not-yet carbonated, not-yet hydrated cement to provide the concrete part. and concrete parts obtainable with the method.

A cement clinker producing system, capable of providing a gas containing a carbon dioxide gas at a high concentration by increasing a carbon dioxide gas concentration for a part of an exhaust gas, includes a cyclone preheater to preheat a cement clinker raw material, a rotary kiln to burn the preheated cement clinker raw material so as to provide cement clinker, a calcination furnace to promote decarbonation of the cement clinker raw material, a clinker cooler to cool the cement clinker, a kiln exhaust-gas discharge passages to discharge an exhaust gas generated in the rotary kiln, a combustion-supporting gas supply device to supply a combustion-supporting gas having a higher oxygen concentration than air, a combustion-supporting gas supply passage to guide the combustion-supporting gas to the calcination furnace, and a calcination furnace exhaust-gas discharge passage to discharge a carbon dioxide gas-containing exhaust gas generated in the calcination furnace.

This invention provides a co-disposal pollution control method of municipal solid waste and fly ash leached by membrane concentrate, obtained residue and application thereof. A co-disposal pollution control method of municipal solid waste and fly ash leached by membrane concentrate, comprising the following steps: heat treating the mixture of leached ash and municipal solid waste at 800-1100° C. to obtain residue; the leaching ash is fly ash after being leached with membrane concentrate. The invention solves the problems existed in the co-disposal treatment of membrane concentrate, incineration fly ash and municipal solid waste, and the leaching toxicity of the ash leached by the membrane concentrated solution is reduced, moreover, the leaching concentration of heavy metals in the residue obtained after the leaching treatment is treated with municipal solid waste at medium and high temperature, and the residue obtained after heat treatment can be used as building materials.

A method is provided for inputting thermal energy into fluidic medium in a cement manufacturing process by at least one rotary apparatus comprising a casing with at least one inlet and at least one exit, a rotor comprising at least one row of rotor blades arranged over a circumference of a rotor hub mounted onto a rotor shaft, and a stator configured as an assembly of stationary vanes arranged at least upstream of the at least one row of rotor blades. In the method, an amount of thermal energy is imparted to a stream of fluidic medium directed along a flow path formed inside the casing between the inlet and the exit by virtue of a series of energy transformations occurring when said stream of fluidic medium passes through the stationary guide vanes and the at least one row of rotor blades, respectively. The method further comprises: integration of said at least one rotary apparatus into a cement production facility configured to carry out cement production processes, such as burning cement clinker or calcination of raw materials, at temperatures essentially equal to or exceeding 500 degrees Celsius (° C.), and conducting an amount of input energy into the at least one rotary apparatus integrated into the heat-consuming process facility, the input energy comprises electrical energy. A rotary apparatus and related uses are further provided.

Methods, systems, and apparatus for generating a recipe for a concrete mixture, comprising: obtaining an optical characterization of a set of particles; determining, based on the optical characterization, physical characteristics of the set of particles; generating a multispherical approximation of the set of particles; selecting, based on the physical characteristics of the set of particles and from a database of performance rules, performance rules applicable to the set of particles; predicting performance of a proposed recipe for a concrete mixture formed from the set of particles by: determining a wet flowability rating of the proposed recipe based on the selected performance rules; and determining a dry packing rating of the proposed recipe based on the multispherical approximation; iteratively altering the proposed recipe and predicting performance of the altered proposed recipe until the predicted performance satisfies performance criteria to obtain a final recipe; and outputting the final recipe.

A method for the preparation of industrial-scale concrete installations with improved compression strength, curling, shrinking and cracking characteristics, the method comprising the addition of nanosilica particulate, and more preferably, colloidal amorphous silica, having specific size and surface area characteristics, to a concrete mix after water has been added to the mix and the mix has been agitated.

Provided herein are compositions, methods, and systems comprising vaterite and magnesium oxide.

Described are cementitious reagent materials produced from globally abundant inorganic feedstocks. Also described are methods for the manufacture of such cementitious reagent materials and forming the reagent materials as microspheroidal glassy particles. Also described are apparatuses, systems and methods for the thermochemical production of glassy cementitious reagents with spheroidal morphology. The apparatuses, systems and methods make use of an in-flight melting/quenching technology such that solid particles are flown in suspension, melted in suspension, and then quenched in suspension. The cementitious reagents can be used in concrete to substantially reduce the CO.sub.2 emission associated with cement production.