Collectorless flotation of chalcopyrite and sphalerite ores by using sodium sulfide |
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| Authors: | RH Yoon |
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| Institution: | Canada Centre for Mineral and Energy Technology, Department of Energy, Mines and Resources, Ottawa, Ont. Canada |
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| Abstract: | The flotation of chalcopyrite and sphalerite from copper and copper-zinc ores has been achieved without using thiol-type collectors. Typically, a sulfide ore sample is first treated with sodium sulfide either during grinding or during the preflotation conditioning period, and then the chalcopyrite is floated with frother alone. With a copper-zinc ore, sphalerite is subsequently floated from the chalcopyrite tailings by activating it with copper sulphate. Results of the collectorless flotation tests are comparable to those obtained by using thiol collectors. The mechanisms of selective collectorless flotation are discussed on the basis of differences in the solubilities of sulfide minerals. |
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