China Nonferrous Metallurgy

Red mud is solid waste from the process of alumina production, most of which is treated by stockpiling, its treatment and utilization is one of the major topics facing the aluminum industry. In this paper, By using red mud of Bayer process as the main raw material, together with fly ash, ceramic polishing waste powder and other materials, the building insulation material is prepared with sintering process. The result shows that under the relatively optimum conditions of 40% of added red mud, 1070℃ of sintering temperature and 3% of foaming agent dosage, the performances of the prepared products can reach the relevant code requirements of the industry. By using this technology, not only the red mud can be treated and utilized in large scale, but also the ceramic polishing waste powder and other industrial solid waste can be fully made use of, blazing a new path for utilizing the multisolidwaste in a synergistic way.