METHOD OF BIOLEACHING SOLID GOLD-CONTAINING SULFIDE FLOTOCONCENTRATES Russian patent published in 2017 - IPC C22B11/00 C22B3/18 

FIELD: chemistry.

SUBSTANCE: selective oxidation of minerals: pyrite, pyrrhotite, arsenopyrite, and antimonite. Bioleaching is controlled by the oxidation-reduction potential of the biopulp while continuously determining the mineralogical composition of the flotation concentrate fed for food, determining the content of the latter arsenopyrite and antimonite and the pyrrhotite/pyrite ratio. The regulation of the oxidation-reduction potential of the biopulp is carried out by changing the feed rate and the solid content of the reactor feed, while the value of the oxidation-reduction potential of the biopulp is maintained at 600 mV when measured relative to a standard silver chloride reference electrode.

EFFECT: optimal conditions for bioleaching of gold-containing sulfide minerals, the consumption of reagents decreases, which affects the increase in the degree of gold dissection.

8 cl, 4 dwg, 1 ex