Classifying – separating – and assorting solids – With heat treatment
Patent
1979-03-26
1981-09-08
Halper, Robert
Classifying, separating, and assorting solids
With heat treatment
209167, B02B 102
Patent
active
042883156
ABSTRACT:
An improvement is provided in a process for the flotation of an acid grade fluorspar enriched concentrate, having a sulfide sulfur content not greater than about 0.02%, from a fluorspar ore containing in addition to fluorspar substantial amounts of gangue minerals and metallic sulfide accessory minerals. The invention utilizes in this conventional flotation process an alkali metal sulfide, preferably sodium sulfide, as a depressor reagent, in substitution of environmentally objectionable sodium cyanide, to depress the flotation of metallic sulfide minerals, thereby rendering a flotation concentrate low in sulfide sulfur content while substantially reducing associated environmental effects.
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Morrisey, IV John C.
Smith Ulus R.
Allied Corporation
Halper Robert
Hoffman Thomas D.
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