METHOD FOR REUSING RED MUD - SILICA PRODUCTION WASTE Russian patent published in 2002 - IPC

FIELD: environmental safety. SUBSTANCE: method consists in preparing mixture of red mud with lime milk followed by treatment of this mixture in presence of reducing agent and separation of iron-containing product. Mixture is supplemented by silica component (5- 20% lime, 5-20% silica, and red mud to 100%). Treatment is carried out at 1300-1500 C to obtain melt, which is then heated to 1800 C, cooled to 1500 C, and granulated. Granulate is further ground. Method can be applied in metallurgy and in building materials production. EFFECT: simplified process and optimized process parameters, increased yield of valuable products. 7 cl, 1 dwg, 2 ex