Recovery of alumina from bauxite
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United States of America Patent
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-
Jun 9, 1992
Grant Date -
N/A
app pub date -
Jul 18, 1989
filing date -
Jul 18, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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