Abstract: The present disclosure provides a system for CO2 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 CO2 and medium balls, a composite slurry prepared by the slurry making module, and can cyclically use the gas containing CO2, 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.

Abstract: The present disclosure provides a system for CO2 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 CO2 and medium balls, a composite slurry prepared by the slurry making module, and can cyclically use the gas containing CO2, 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.

Abstract: Provided is an efficient and energy-saving building slurry stirring device. The device includes a grouting assembly, which includes a base, a storage tank, a discharge pipe, a grouting pump and a control box. The storage tank is arranged at the top of the base, the discharge pipe is located at one side of the storage tank, the grouting pump is arranged on the discharge pipe, and the control box is fixed to the top of the base. When the fluidity of a grouting material in the storage tank is reduced due to solidification, the stirring assembly can stir the grouting material in the storage tank. Then, the stirring assembly stops stirring the grouting material to save energy. After the grouting is completed, an inner wall of the storage tank can be cleaned by the stirring assembly.

Abstract: The present invention discloses a method of preparing an alkali activation material by using red mud-based wet grinding and carbon sequestration and an application thereof. The preparation method includes: (1) adding water, red mud, a crystalline control agent, and a grinding aid into a wet grinding carbon sequestration apparatus to perform wet grinding, and simultaneously introducing CO2 until a slurry pH reaches 7 to 7.5; and removing wet grinding balls by a sieve to obtain a slurry A; (2) adding carbide slag, water and a water reducer to a wet planetary ball grinder tank for wet grinding, and removing wet grinding balls by a sieve to obtain a slurry B; (3) taking 50 to 80 parts of the slurry A and 20 to 50 parts of the slurry B and mixing them to obtain an alkali activation material.

Abstract: The present invention provides a method of preparing a recycled cementitious material by a phosphogypsum-assisted carbon sequestration pretreatment process. The method includes: (1) placing 100 mass parts of phosphogypsum, 1 to 2 mass parts of grinding aid, 10 to 20 mass parts of sodium-containing alkali component, 150 to 300 mass parts of zirconia balls, and 150 to 300 mass parts of water into a wet grinding tank for wet grinding. After 10 min to 30 min of wet grinding, introducing CO2 at a flow rate of 1.5 to 2.2 mass parts/min to keep a temperature of a wet grinding slurry below 40° C. When the wet grinding slurry reaches pH=10, ending the wet grinding and sieving out a wet grinding slurry; (2) mixing the wet grinding slurry with 700 to 1000 mass parts of slag and 100 to 350 mass parts of water to obtain a recycled cementitious material.

Abstract: The present invention provides a method of preparing a recycled cementitious material by a phosphogypsum-assisted carbon sequestration pretreatment process. The method includes: (1) placing 100 mass parts of phosphogypsum, 1 to 2 mass parts of grinding aid, 10 to 20 mass parts of sodium-containing alkali component, 150 to 300 mass parts of zirconia balls, and 150 to 300 mass parts of water into a wet grinding tank for wet grinding. After 10 min to 30 min of wet grinding, introducing CO2 at a flow rate of 1.5 to 2.2 mass parts/min to keep a temperature of a wet grinding slurry below 40° C. When the wet grinding slurry reaches pH=10, ending the wet grinding and sieving out a wet grinding slurry; (2) mixing the wet grinding slurry with 700 to 1000 mass parts of slag and 100 to 350 mass parts of water to obtain a recycled cementitious material.

Abstract: The present invention discloses a method of preparing an alkali activation material by using red mud-based wet grinding and carbon sequestration and an application thereof. The preparation method includes: (1) adding water, red mud, a crystalline control agent, and a grinding aid into a wet grinding carbon sequestration apparatus to perform wet grinding, and simultaneously introducing CO2 until a slurry pH reaches 7 to 7.5; and removing wet grinding balls by a sieve to obtain a slurry A; (2) adding carbide slag, water and a water reducer to a wet planetary ball grinder tank for wet grinding, and removing wet grinding balls by a sieve to obtain a slurry B; (3) taking 50 to 80 parts of the slurry A and 20 to 50 parts of the slurry B and mixing them to obtain an alkali activation material.