Flotation process for recovery of phosphate values from ore
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United States of America Patent
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Apr 12, 1988
Grant Date -
N/A
app pub date -
Jan 3, 1986
filing date -
Jan 3, 1986
priority date (Note) -
Expired
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Abstract
A process for recovering phosphate values from silica-containing phosphate ores is provided. The ore has a particle size in the range of about 0.6 to 1.2 mm and is subjected to selective flotation in the presence of a cationic flotation reagent comprising a di(hydrophobic group) quaternary ammonium salt, wherein each of the hydrophobic groups contain 6 or more carbon atoms and at least one of the groups contains from about 10-20 carbon atoms, in combination with a hydrocarbon oil and a phosphate depressing agent.
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