Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1985-01-07
1986-03-11
Nozick, Bernard
Classifying, separating, and assorting solids
Fluid suspension
Liquid
252 61, 75 2, B03D 102
Patent
active
045754195
ABSTRACT:
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 percent by weight of a mixture of sodium thiophosphates comprising, as major components thereof, Na.sub.3 PS.sub.4, Na.sub.3 PS.sub.3 O, Na.sub.3 PS.sub.2 O.sub.2, and Na.sub.3 PO.sub.3 S, with Na.sub.3 PS.sub.4 further comprising from about 15 mole percent to about 70 mole percent of phosphate mixture. The flotation reagent can be prepared by reacting P.sub.4 S.sub.10 with NaOH and NaSH in a molar ratio of about 1:16. When added to a flotation 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.
REFERENCES:
patent: 2811255 (1957-10-01), Nokes
patent: 3435952 (1969-04-01), Corbett
patent: 4268380 (1981-05-01), Shaw
patent: 4515688 (1985-05-01), Vargas
Peterson John A.
Saran Mohan S.
Wisnouskas Joseph S.
Gosz William G.
Nozick Bernard
Occidental Chemical Corporation
Tao James F.
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