FLOTATION OF SULFUR PYRRHOTITE-PYRITE ORES OF FERROUS AND NONFERROUS METALS Russian patent published in 2013 - IPC B03D103/00 

FIELD: process engineering.

SUBSTANCE: invention relates to flotation of sulfur pyrrhotite-pyrite ores containing valuable components: copper, zinc and noble metals. Method of flotation of copper-zinc-pyrrhotite-pyrite ore comprises crushing in subcalcareous medium, conditioning by collectors and foam makers, copper flotation with production of "copper head", collective copper-zinc flotation with production of collective concentrate containing copper minerals and natural activated black jack, tails of collective copper-zinc flotation are conditioned by copper sulfate. Black jack is activated by lime and collector to perform selective flotation to extract black jack to zinc concentrate to produce pyrrhotite-pyrite-bearings final tailings. Composition "М-ТФ" composed of the mix of isobutyl dithiophosphate and thionourethane is used as collectors at the following molar ratio of components: isobutyl dithioohosphate:thionourethane of 20:40 to 60:80%, fed in combination with butyl xanthate as follows, in flotation cycles: copper cycle - "М-ТФ" composition is used, collective cycle - 3-4 wt % of "М-ТФ" and 0:1 wt % of butyl xanthate are used, zinc cycle - combination of 0:1 wt % of "М-ТФ" and 3-4 wt % of butyl xanthate.

EFFECT: higher yield of copper and zinc sulphides in commercial concentrates and that of zinc concentrate, reduced floatability of pyrrhotite-pyrite in all process operations.

2 cl, 1 tbl