METHOD OF RECOVERING A COPPER SULFIDE CONCENTRATE FROM AN ORE CONTAINING AN IRON SULFIDE Russian patent published in 2018 - IPC B03D1/02 

FIELD: flotation.

SUBSTANCE: present invention relates to a froth flotation process with the addition of oxidising agents and can be used for flotation recovery of a copper sulphide-containing concentrate from ore containing iron sulphide. Method for recovering copper sulphide from an ore containing iron sulphide comprises steps of: a) wet grinding of ore using grinding media to obtain mineral pulp, b) conditioning the mineral pulp using a collector compound to produce conditioned mineral pulp and c) froth flotation of the conditioned mineral pulp to produce froth and flotation tailing, separating the froth from the flotation tailing to recover a copper sulphide concentrate. In the disclosed method, hydrogen peroxide is added to the conditioned mineral pulp between steps b) and c) or during step c) in an amount effective to lower the redox potential of the conditioned mineral pulp. Hydrogen peroxide is added in an amount lowering the redox potential by at least 10 mV. Hydrogen peroxide is added less than 15 minutes before a gas is introduced for froth flotation. Froth flotation is carried out continuously and hydrogen peroxide is added continuously during froth flotation. Hydrogen peroxide is added as an aqueous solution comprising 0.5 to 5% by weight hydrogen peroxide. Alkali metal alkyl xanthate is used as collector. Grinding media comprise a grinding surface made of steel or cast iron having an iron content of at least 90% by weight. Amount of hydrogen peroxide added is adjusted to provide a maximum lowering of redox potential after hydrogen peroxide addition.

EFFECT: technical result is an increase in the content of copper sulphides in the concentrate and the degree of extraction of copper sulphides, low consumption of chemicals required for processing.

8 cl, 8 dwg, 12 tbl, 13 ex