METHOD OF FLOTATION ENRICHMENT OF SULPHIDIC COPPER-NICKEL 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 in processing sulphidic copper-nickel ores. Proposed method comprises two-step ore crushing in alkaline medium, bulk flotation of sulphide minerals in the presence of sulfhydryl collectors to produce bulk copper-nickel concentrate and final tailings, refining black concentrate with final grinding of bulk concentrate. Foamed product I of primary flotation is fed to desorption, rinsing, thickening, grading, additional grinding of classification sands, mechanical-chemical activation of ground product in the presence of disperser, heating and contact with reagents: disperser and depressor. 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 stage of grinding to grain size of at least 90% of 74 mcm-size, contact with reagents: disperser and depressor. Then they come to 2^nd main flotation carried out in the presence of sulfhydryl collector and foaming agent to produce 2^nd bulk concentrate of main flotation and final tailings. Foamed product I of 1^st and 2^nd primary flotation is fed to desorption, rinsing, thickening, grading, additional grinding of classification sands, mechanical-chemical activation of ground product in the presence of disperser, heating and contact with reagents: disperser and depressor. Then it is fed to cycle of re-cleaning operations of flotation in the presence of sulfhydryl collector and foaming agent to produce finished bulk copper-nickel concentrate.

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

16 cl, 1 dwg, 1 tbl, 9 ex