| 简介 |
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, re-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. Then tails of the 2nd main flotation after grinding to at least 90% of 74 mcm-grain size and contact with reagents come to 3rd main flotation carried out in the presence of sulfhydryl collector and foaming agent to produce 3rd bulk concentrate of main flotation and final tailings. 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 of the 2nd and 3rd main floatation come into scouring cycle operations carried out in the presence of sulfhydryl collector and foaming agent to produce 2nd bulk concentrate.
EFFECT : increased extraction of copper and nickel into bilk concentrate, higher quality.
16 cl, 1 dwg, 1 tbl, 9 ex |
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