Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1993-06-28
1995-05-02
Lithgow, Thomas M.
Classifying, separating, and assorting solids
Fluid suspension
Liquid
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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Fekete Simon O.
Kelebek Sadan
Wells Peter F.
Falconbridge Ltd.
Lithgow Thomas M.
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