Beneficiation of high carbonate phosphate rock

Details Beneficiation of high carbonate phosphate rock Beneficiation of high carbonate phosphate rock

B - Operations, Transporting

03

D

361/17

B03D 1/02 (2006.01)

Patent

CA 1251874

ABSTRACT The amount of carbonate mineral impurities is reduced in aqueous phosphate rock slurry by (a) con- ditioning the slurry with an effective amount of CO2, (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 im- purities are concentrated in the froth. The CO2 acts to depress flotation of phosphate minerals relative to the carbonate mineral impurities.

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