Abstract
The authors discuss flotation of fahl ore. It is proved that tennantite should be separated into an individual copper product in order to enhance overall copper recovery and mitigate ecological impact by means of preventing arsenic volatilization under smelting. Single mineral fractions of pyrite, chalcopyrite, tennantite, secondary sulfides, sphalerite and quartz sampled in the Ural region, as well as the samples of copper-zinc ore containing fahl ore are examined. The research involves oxidation of copper sulfides and pyrite under grinding in different conditions. Concentration of oxygen and sulfur-bearing ions is under control. The differences in oxygen consumption, oxidation of pyrite, tennantite and other sulfides are used to develop the mode of tennantite separation from other copper sulfides, sphalerite and pyrite. Based on the research findings, the authors recommend a flotation technology for copper–zinc pyritic ore with high content of tennantite to separate tennantite and secondary copper sulfides in different flotation circuits at varied pH.
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