(1) disseminated ore flotation of copper
Generally, a relatively simple process is adopted. After a period of grinding, the fineness-200 mesh accounts for 50%~70%, 1 rough selection, 2~3 times selection, and 1~2 sweeps. If the particle size of the copper mineral is relatively fine, a stage grinding process may be considered. 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 -200 mesh accounts for 45%~50%, and regrind-200 mesh accounts for 90%~95%.
(2) 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 difficult. 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 content of gangue in the ore exceeds 20%~25%, it needs to be sorted 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, the amount of yellow drug is above 100g/(t ore), and the lime is above 8~10kg (t ore).
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