Flotation separation of arsenopyrite from pyrite

Details Flotation separation of arsenopyrite from pyrite Flotation separation of arsenopyrite from pyrite

1991-11-27

1992-12-15

Silverman, Stanley S.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209167, 241 20, 241 24, B03D 1002, B03D 102, B03D 106

Patent

active

051714280

ABSTRACT:
Arsenopyrite is separated from a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO.sub.3.sup.- ions at elevated temperature and pH below about 8 for a period sufficient to impart a selective depression property to the arsenopyrite. On addition of a collector the pyrite is rendered floatable, enabling froth flotation to achieve a concentrate rich in pyrite and tailings rich in arsenopyrite.

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