METHOD OF SULFIDE COPPER-NICKEL ORES FLOTATION DRESSING

FIELD: metal mining industry; sulfide copper-nickel ores flotation dressing. ^ SUBSTANCE: the invention presents a method of sulfide copper-nickel ores flotation dressing, which is dealt with the field of metal mining industry, in particular, with flotation dressing of sulfide copper-nickel ores containing platinum metals. The technical result is a raise of a share of extraction of color and precious metals into the metals shared concentrate at the expense of use of sulfhydryl collectors with the intensified floatation activity. The method provides for comminution and conditioning of the ore over a sulfhydryl collector - dithiocarbonate, introduction in the first stage of a flotation of oil-soluble sulphonates of alkali-earth metals and a foaming agent, and a step by step floatational extraction of copper and nickel sulfides into the froth products enriched with platinum metals, and the minerals of the waste rock - in the final tailings. The oil-soluble sulphonates of alkali-earth metals before their introduction on the first stage of the flotation are mixed with a chemical compound out of the group of dithiophosphates under the temperature from 10 up to 60 at the mass ratio of the oil-soluble sulphonates of alkali-earth metals and the chemical compound out of the group of dithiophosphates as 1 : (30-250). Then in the flotation pulp the mass ratio of dithiocarbonate and dithiophosphate is kept equal to (0.5-2.5) : 1. ^ EFFECT: the invention allows to raise a share of extraction of color and precious metals. ^ 16 ex, 1 tbl