Beneficiation of high carbonate phosphate rock
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United States of America Patent
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-
Feb 4, 1986
Grant Date -
N/A
app pub date -
Aug 20, 1984
filing date -
Aug 20, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The amount of carbonate mineral impurities is reduced in aqueous phosphate rock slurry by (a) conditioning the slurry with an effective amount of CO.sub.2, (b) adding an effective amount of an anionic collector to the slurry and (c) subjecting the slurry to a froth flotation process whereby the carbonate mineral impurities are concentrated in the froth. The CO.sub.2 acts to depress flotation of phosphate minerals relative to the carbonate mineral impurities.
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