METHOD FOR BULK FLOTATION OF POLYMETALLIC ORES BASED ON USE OF MICROEMULSIONS Russian patent published in 2024 - IPC B03D1/02 

FIELD: enrichment of minerals.

SUBSTANCE: proposed invention can be used in flotation of polymetallic lead-zinc, copper-nickel, copper-lead-zinc and other types of ores, which are processed according to collective-selective enrichment schemes. Method for collective flotation of polymetallic ores based on use of microemulsions includes a cycle of ore preparation by grinding with addition of sodium sulphide in amount of 100 g/t, reagent treatment of pulp with reagent-activator, which is copper sulphate, a collecting reagent based on potassium butyl xanthate in the form of a reverse microemulsion and a foaming agent T-92, which is a mixture of alcohols and dimethyldioxane ethers, and bulk flotation. Before the pulp is treated with the activating reagent, a pulp pH regulator is introduced to achieve values from 8.5 to 9.0. Before treatment with a collecting reagent based on butyl potassium xanthate in the form of a reverse microemulsion, a collecting reagent based on 5 dialkyldithiophosphates is additionally introduced into the pulp with the number of C atoms in the hydrocarbon chain from 2 to 5—BTP-152—with its share in the total consumption of collecting reagents from 15% to 85%.

EFFECT: increased selectivity of extraction of lead and zinc minerals into bulk concentrates of flotation, reduced weight fraction of iron in bulk sulphide concentrates.

1 cl, 2 tbl, 1 ex