Differential flotation reagent for molybdenum separation

Details Differential flotation reagent for molybdenum separation Differential flotation reagent for molybdenum separation

B - Operations, Transporting

03

D

361/23, 361/4

B03D 1/02 (2006.01)

Patent

CA 1217580

DIFFERENTIAL FLOTATION REAGENT FOR MOLYBDENUM SEPARATION ABSTRACT OF THE DISCLOSURE A dry differential flotation reagent for molybdenum-bearing ore is disclosed comprising from about 1 to about 30 percent by weight of NaSH, 0 to 20 percent by weight of NaOH, 60 to 90 per- cent by weight of a mixture of sodium thiophosphates comprising, as major components thereof, Na3PS4, Na3PS30, Na3PS202, and Na3P03S, with Na3PS4 further comprising from about 15 mole per- cent to about 70 mole percent of the phosphate mixture. The flotation reagent can be prepared by reacting P4S10 with NaOH and NaSH in a molar ratio of about 1:16. When added to a flo- tation vessel containing molybdenum concentrate, the flotation reagent promotes suppression of lead and copper sulfides, even without the addition of sodium cyanide, to permit the improved recovery of molybdenum with a lower level of impurities.

448765

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