The separation of chalcopyrite and chalcocite from pyrite in cleaner flotation after regrinding |
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| Affiliation: | 1. Julius Kruttschnitt Mineral Research Centre, The University of Queensland, Isles Road, Indooroopilly, Brisbane, QLD 4068, Australia;2. School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia;1. Julius Kruttschnitt Mineral Research Centre, The University of Queensland, Isles Road, Indooroopilly, Brisbane, QLD 4068, Australia;2. School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia;1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, PR China;2. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, PR China;1. School of Chemical Engineering, The University of Queensland, St. Lucia, Brisbane, QLD 4072, Australia;2. School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 34100, China |
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| Abstract: | In this study, the differences between the separation of chalcopyrite and chalcocite from pyrite in cleaner flotation after regrinding were investigated. In the rougher flotation prior to regrinding, high chalcopyrite and chalcocite recovery were obtained in conjunction with high pyrite flotation recovery due to the activation of pyrite by copper ions during primary grinding. The rougher flotation concentrate was reground in a rod mill before cleaner flotation. It was found that chalcopyrite and chalcocite exhibited different flotation behavior and also affected pyrite flotation differently in cleaner flotation. The mechanism underpinning these phenomena was investigated by a range of techniques including the polarization of mineral electrodes, X-ray photoelectron spectroscopy (XPS) analyses and ethylene diamine tetraacetic acid (EDTA) extraction. It was found that the flotation behavior of both copper minerals and their effect on pyrite flotation after regrinding were governed by their electrochemical activities and galvanic coupling with pyrite. |
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| Keywords: | Regrinding Copper minerals Pyrite activation Surface oxidation Galvanic interaction |
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