METHOD OF FLOATATION OF COPPER-ZINC-PYRITE ORE (VERSIONS) Russian patent published in 2011 - IPC B03B1/02 

FIELD: technological processes.

SUBSTANCE: invention relates to the field of floatation dressing of sulphide ores with industrial content of precious components, such as copper, zinc and noble metals. The method of floatation of copper-zinc-pyrite ore includes grinding in alkaline medium, conditioning with reagents - collectors and a foaming agent, collective copper-zinc floatation to produce a collective concentrate, containing minerals of copper and naturally activated sphalerite, and tails. The collector is a composition of selective weak collectors fed in the following sequence - isobutyl dithiophosphate and isopropyl-O-methyl-N-thionocarbamate and a strong collector - a butyl xanthate at the ratio of 3:4.5:1; at the same time tails of collective copper-zinc floatation are conditioned with blue vitriol, to activate sphalerite, lime and a collector, such as a composition of selective weak collectors - isobutyl dithiophosphate and isopropyl-O-methyl-N-thionocarbamate and a strong collector - butyl xanthate at the ratio of 3:4.5:1, and selective floatation is carried out to extract sphalerite into zinc concentrate and production of final pyrite-containing tails. According to the other version of the method realisation the tails of collective copper-zinc floatation are conditioned with blue vitriol, to active sphalerite, with lime and a collector, such as a composition of selective weak collectors - isobutyl dithiophosphate and isopropyl-O-methyl-N-thionocarbamate at the ratio of 1:1.5, and selective floatation is carried out to extract sphalerite into zinc concentrate and to produce final pyrite-containing tails.

EFFECT: improved efficiency of floatation.

2 cl, 1 tbl, 2 ex