Semi-Dry Desulfurization Ash Modification and Application in Autoclaved Brick

The modification of calcium sulfite in semi-dry desulfurization ash was studied. By the combining use of catalyst and oxidant, the content of calcium sulfite in the modified desulfurized ash was greatly reduced. In this way, the calcium oxide and calcium sulfate in the modified desulfurization ash were used to partially replace the lime, gypsum and other materials in the process of autoclaved brick production. The hydration reaction mechanism was discussed.