Characterisation of sphalerite and pyrite surfaces activated by copper sulphate

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• 作者：Majid Ejtemaei ; Anh V. Nguyen ; ^{anh.nguyen@eng.uq.edu.au}
• 关键词：Copper activation ; Sphalerite ; Pyrite ; Cryo-XPS ; Zeta potential
• 刊名：Minerals Engineering
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：100
• 期：Complete
• 页码：223-232
• 全文大小：1366 K
• 卷排序：100

文摘

Cu-activated sphalerite and pyrite were characterised by XPS and zeta potential. Covellite on sphalerite is formed by reducing exchanged Cu2+ to Cu+ and oxidising S2− to S−. Chalcopyrite on pyrite is formed by reducing Cu2+ to Cu+, oxidising S2− to S− and Fe2+ to Fe3+. Depth profiling shows Cu diffusion to sphalerite up to 10 nm and 3 nm Cu-product on pyrite. The zeta potentials confirmed CuS and CuFeS2 on sphalerite and pyrite, respectively.