| 摘要 |
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 1st bulk concentrate and tails that are directed to grading before 2nd stage of grinding. Tails of the 1st main flotation come to 2nd stage of grinding to grain size of at least 90% of 74 mcm-size, contact with reagents: disperser and depressor. Then they come to 2nd main flotation carried out in the presence of sulfhydryl collector and foaming agent to produce 2nd bulk concentrate of main flotation and final tailings. Foamed product I of 1st and 2nd 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 |
