Selective flotation process for separation of sulphide minerals

Classifying – separating – and assorting solids – Fluid suspension – Liquid

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209167, 252 61, B03D 101, B03D 1018, B03D 1002, B03D 102

Patent

active

054111480

ABSTRACT:
This invention provides a process for improved separation of mono/multi-metallic sulphide minerals from significant amounts of iron sulphides, mainly pyrrhotite and/or their finely divided process middlings. The process comprises subjecting such material to a conditioning stage with at least one water-soluble sulphur-containing inorganic compound as a prerequisite step for further conditioning with nitrogen-containing organic chelating agents, preferably polyethylenepolyamines, prior to froth flotation wherein iron mineral, primarily pyrrhotite is depressed, thus allowing selective recovery of mono/multi-metallic minerals containing non-ferrous metal value(s).

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