Recovery of alumina from bauxite

Details Recovery of alumina from bauxite Recovery of alumina from bauxite

C - Chemistry, Metallurgy

01

F

23/246

C01F 7/06 (2006.01) B01D 21/01 (2006.01) C01F 7/47 (2006.01)

Patent

CA 2000515

Red mud in Bayer process liquors are flocculated using dextran and synthetic anionic polymer in the same stage, usually added separately to the liquor. The liquor may be the primary settler slurry, the secondary clarification liquor or one or more of the red mud washing stages. The process is of particular advantage where the liquors are high in carbonate content and/or total alkalinity.

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