I. Flotation of disseminated copper ore
Generally, a relatively simple process is adopted. After a period of grinding, the fineness-200 mesh accounts for about 50% to 70%, one rough selection, two to three times, and one or two sweeps. The relatively small particle size copper minerals disseminated may consider the selected stage grinding process. The beneficiation plant process bornite, mostly coarse concentrate regrinding - a selection of stage grinding and separation processes, and its essence is mixed - flotation process. After a rough grinding, rough selection, sweeping, and then re-grinding the coarse concentrate to obtain high-grade copper concentrate and sulfur concentrate. Rough grinding fineness - 200 mesh accounts for about 45% to 50%, and regrind fineness - 200 mesh accounts for about 90% to 95%.
Second, the flotation of dense copper ore
Since the dense copper ore chalcopyrite and pyrite symbiotic dense, pyrite is often activated secondary copper minerals, high pyrite content, it is difficult to suppress, separation difficulties. Copper concentrate and sulfur concentrate are required to be obtained simultaneously during the sorting process. The tailings usually selected after copper are sulfur concentrates. If the gangue content in the ore exceeds 20% to 25%, it is necessary to sort again to obtain the concentrate. For the treatment of dense copper ore, two-stage grinding or stage grinding is often used, and the fineness of grinding is required to be fine. The dosage of the drug is also relatively large, and the yellow drug dosage is 100 g/(t ore) or more, and the lime is 8 to 10 kg (t ore).
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