METHOD OF ARSENIDES INHIBITION DURING FLOATATION OF MULTI-SULPHIDE MINERALS Russian patent published in 2009 - IPC B03D1/02 

FIELD: mining.

SUBSTANCE: floatation method for selective extraction of expensive metals as well as method for extracting high content of nickel and metal copper concentrate from nickel-copper ore involves the following stages: wet grinding of ore thus obtaining suspension; suspension pH control to the pre-set value by adding reagents, providing oxidising atmosphere in the suspension, adding a combination of reagents from polyamine and the matters containing sulphur to the suspension in order to inhibit floatation of arsenide minerals for extracting expensive minerals and adding a combination of reagents from polyamine and sulphite to the suspension in order to inhibit arsenide minerals for extracting high content of nickel and metal copper concentrate from nickel-copper ore, repeated pH control of the suspension to the pre-set value by means of reagents, and adding the collecting agent in quantity of 10-125 g/t of the ore and the foaming agent in quantity of 10-60 g/t of the ore to the suspension.

EFFECT: improving floatation effectiveness.

25 cl, 11 dwg, 1 tbl