Selective flotation process for separation of sulphide minerals

Details Selective flotation process for separation of sulphide minerals Selective flotation process for separation of sulphide minerals

B - Operations, Transporting

03

D

B03D 1/02 (2006.01) B03D 1/002 (2006.01) B03D 1/01 (2006.01)

Patent

CA 2082831

Abstract This invention provides a process for improved separation of mono/multi-metallic sulphide minerals from significant amounts of iron sulphidess, 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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