Method of preparing alkali activation material by using red mud-based wet grinding and carbon sequestration and application thereof

A method of preparing an alkali activation material, comprising:

• (1) performing wet grinding on water, red mud, a crystalline control agent, and a grinding aid with a mass ratio of 100:(20 to 50):(1 to 3):(1 to 5), simultaneously introducing CO2 at a flow rate of 0.1 to 0.25 L/min, and keeping a pressure at 0.2 to 0.5 MPa until a pH of a slurry reaches 7 to 7.5, so as to obtain a slurry A;
• (2) adding carbide slag, water, and a water reducer with a mass ratio of 100:(30 to 60):(1 to 5) into a wet planetary ball grinder tank for 30 to 60 min of wet grinding so as to obtain a slurry B;
• (3) mixing 50 to 80 parts by mass of the slurry A and 20 to 50 parts by mass of the slurry B to obtain the alkali activation material;
• wherein the crystalline control agent is selected from a group consisting of sodium hexametaphosphate, sodium sulfate and sodium polycarboxylate.