METHOD OF FLOTATION ENRICHMENT OF SULPHIDE ORES Russian patent published in 2010 - IPC B03D1/02 B03B9/00 

FIELD: process engineering.

SUBSTANCE: invention relates to enrichment of mineral resources and can be used for flotation of copper-molybdenum, copper-nickel and other bimetal ores. Method comprises grinding ore and open-cycle bulk flotation of two and more metals in alkaline medium produced by line and re-cleaning of reground crude concentrate. Foamed product I of primary flotation is fed to desorption, rinsing, thickening, grading, re-grinding of classification sands, mechanical-chemical activation of ground product in the presence of disperser, heating and contact with reagents: disperser and depressor. Then foamed product I of primary flotation is fed to cycle of re-cleaning operations of flotation in the presence of sulfhydryl collector and foaming agent to produce 1^st bulk concentrate and tails that are directed to grading before 2^nd stage of grinding. Tails of the 1^st main flotation come to 2^nd grinding stage and come in contact with reagents: disperser and depressor. Then tails of the 1^st main flotation come to 2^nd main flotation carried out in the presence of sulfhydryl collector and foaming agent to produce 2nd bulk concentrate of main flotation and final tailings. Tails of the 2^nd main flotation after 3^rd stage of grinding to grain size of at least 90% of 74 mcm-size, contact with reagents: disperser and depressor. Then they come to 3^rd main flotation carried out in the presence of sulfhydryl collector and foaming agent to produce 3^rd bulk concentrate of main flotation and final tailings. Combined foamed product 1^st, 2^nd and 3^rd primary flotation is fed to desorption, rinsing, thickening, grading, re-grinding of classification sands, mechanical-chemical activation of ground product in the presence of disperser, heating and contact with reagents: disperser and depressor. Then foamed product I of primary flotation is fed to cycle of re-cleaning operations of flotation in the presence of sulfhydryl collector and foaming agent to produce bulk concentrate and tails that are directed to grading before 2^nd stage of grinding.

EFFECT: increased extraction of copper and nickel into bilk concentrate, higher quality.

16 cl, 1 dwg, 2 tbl, 18 ex