Flue gas comprehensive utilization and aerated concrete product preparation process taking red mud as main raw material

Abstract

The invention discloses a flue gas comprehensive utilization and aerated concrete product preparation process taking red mud as a main raw material. During production, 60-70% of red mud powder, 8-15%of zeolite powder or fly ash, 6-20% of quicklime powder, 6-15% of 52.5 ordinary Portland cement, 10-20% of polished tile waste residues, 0.5-2% of water glass, 0.1-0.3% of sodium cellulose, 0.1-0.5% of a cement water reducing agent, water with the material-water ratio of 0.60-0.7 and the like are prepared into desulfurized slurry, foaming suspension is added into the desulfurized slurry, stirringand mixing are carried out, injection molding is carried out, after primary curing and demolding are carried out in a tunnel kiln, a product is cut and then subjected to steam curing in the tunnel kiln, heat needed by steam curing, primary curing and slurry storage is recycled step by step from desulfurized flue gas, finally, clean air is discharged after being cooled to the room temperature, andthe aerated concrete product can be used for sound insulation, heat insulation and heat preservation of buildings.

Description

technical field [0001] The invention relates to a comprehensive utilization of flue gas with red mud as the main raw material and a preparation process for aerated concrete products, in particular to a desulfurizer with red mud as the main raw material, waste heat utilization of low-concentration sulfur dioxide flue gas from ceramic kilns, desulfurization, The comprehensive utilization of dust removal and the preparation process of aerated concrete products based on the by-product of the desulfurizer with red mud as the main raw material. Background technique [0002] Red mud is the polluting waste slag discharged when the aluminum industry extracts alumina. Generally, for every ton of alumina produced, 1.0~2.0 tons of red mud is incidentally produced. As the world's fourth largest producer of alumina, China discharges millions of tons of red mud every year. A large amount of red mud cannot be fully and effectively utilized, and can only be stacked in a large area of ​​stor...

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Problems solved by technology

[0006] The present invention proposes a flue gas comprehensive utilization and aerated concrete product preparation process with red mud as the main raw material, which can resourcefully utilize a large amount of red mud process waste produced in the alumina industry, and at the same time can resourcefully utilize flue gas from the ceramic industry Use waste heat to realize desulfurization and dust collection, and solve the problems existing in the cost and process of the existing red mud desulfurization technology solutions

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