Recovery of alumina from bauxite

Details Recovery of alumina from bauxite Recovery of alumina from bauxite

1989-07-18

1992-06-09

Rosenberg, Peter D.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423122, C02F 154

Patent

active

051205130

ABSTRACT:
A Bayer alumina recovery process is described in which lime is added at an intermediate or final wash stage of the red mud recovery circuit to improve flocculation, especially with flocculants having lower anionic content. The process is particularly useful with liquors containing high amounts of sodium carbonate and for process where the mud is settled by mud stacking.

REFERENCES:
patent: 3390959 (1968-07-01), Sibert
patent: 4335082 (1982-06-01), Matyasi et al.
patent: 4789485 (1988-12-01), Field
patent: 4839060 (1989-06-01), Yong
"Synthetic Flocculant Technology in the Bayer Process" by L. J. Connelly et al., Nalco Chemical Company, pp. 61-68.

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