METHOD OF FLOTATION OF SULPHIDE ORES CONTAINING BEARING METALS Russian patent published in 2013 - IPC B03D1/02 

FIELD: process engineering.

SUBSTANCE: invention relates to dressing of minerals, particularly, to flotation separation of noble metals and may be used for flotation dressing of gold-bearing sulphide ores and dressing products bearing noble metals. Proposed method comprises conditioning of crushed pulp in the presence of the main collector and complexing agent selective with respect to noble metals, introducing foaming agent and releasing noble metals into flotation product foam. Said complexing agent selective with respect to noble metals represents perhydro-1,3,5-dithiazanine-5-il-methane that can form sound bond with noble metals. Relationship between complexing agent selective with respect to noble metals and sulfhydric collector varies from 2:0.5 to 0.5:1.5.

EFFECT: higher yield of noble metals.

3 tbl, 7 ex