Process for the flotation of base metal sulfide minerals in acid

Details Process for the flotation of base metal sulfide minerals in acid Process for the flotation of base metal sulfide minerals in acid

1984-08-17

1985-12-03

Nozick, Bernard

Classifying, separating, and assorting solids

Fluid suspension

Liquid

252 61, B03D 114

Patent

active

045564825

ABSTRACT:
A process for the beneficiation of copper sulfide mineral values from base metal sulfide ores with selective rejection of pyrite and/or pyrrhotite or other gangue minerals at pH values of below about 10.0 by froth flotation is disclosed. The process includes the use of a new and improved collector which at pH values below 10.0 exhibits unexpectedly high collector activity for copper sulfide minerals and selectively rejects pyrite and other gangue sulfides or non-sulfides. The collector for copper mineral values for use in the process comprises at least one hydrocarboxycarbonyl thiourea compound having the formula: ##STR1## wherein R.sup.1 is hydrogen or R.sup.2 ; R.sup.2 is C.sub.1 -C.sub.8 alkyl and R.sup.3 is C.sub.1 -C.sub.6 alkyl or phenyl. In a preferred embodiment of the present invention, froth flotation is conducted under acid pH conditions by adjusting the pH of the flotation slurry with sulfuric acid. The process provides excellent metallurgical recoveries of copper sulfide mineral values of high grade at a substantial reduction in lime consumption and reagents costs associated with prior art flotation separation methods.

REFERENCES:
patent: 3780089 (1973-12-01), Blecher et al.
patent: 3959331 (1976-05-01), Fuchs
patent: 4005217 (1977-01-01), Berg et al.
patent: 4341626 (1982-07-01), Dauplaise et al.
patent: 4387034 (1983-06-01), Unger et al.
CA 74 (15) 76202r.
CA 80 (13) 70756b.
CA 71 (13) 60989e.

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