Red mud dewatering and washing process
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Mar 7, 2000
Grant Date -
N/A
app pub date -
Oct 16, 1997
filing date -
Oct 14, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention covers a process for dehydration/filtration, and washing of red mud, if applicable with addition of sand, particularly from the Bayer process for aluminum production from bauxite, in which filters are used and caustic is washed out on the filter. The invention is basically characterized by washing and dehydration being effected under pressure above atmospheric with regeneration of bound caustic and production of a residue with a high solids concentration. In addition, the invention covers a plant for the implementation of the process.
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