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Minerals 2017, 7(7), 111;

The Influence of Common Monovalent and Divalent Chlorides on Chalcopyrite Flotation

School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
School of Natural and Built Environments, University of South Australia, Mawson Lakes, SA 5095, Australia
Blue Minerals Consultancy, Middleton, SA 5213, Australia
Author to whom correspondence should be addressed.
Received: 2 June 2017 / Revised: 25 June 2017 / Accepted: 26 June 2017 / Published: 1 July 2017
(This article belongs to the Special Issue Flotation Chemistry)
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Much attention has been paid to the flotation of chalcopyrite using saline seawater. However, the influence of salt ions on mineral flotation is complex, and different salts may play various roles—either beneficial or detrimental. This study investigated the effects of common chlorides (Cl) of Na+, K+, Mg2+, and Ca2+ in seawater on chalcopyrite floatability. The presence of Na+, K+, and Ca2+ resulted in greater chalcopyrite recovery, with this effect being more pronounced for the monovalent cations. In contrast, the addition of Mg2+ resulted in decreased chalcopyrite flotation efficiency. Contact angle measurements showed that the presence of monovalent cations increased the hydrophobicity of the chalcopyrite surface, while the presence of divalent cations reduced its hydrophobicity, depending on the concentration. Zeta potential, pulp species, and X-ray photoelectron spectroscopy (XPS) cross-confirmed the precipitation of Mg(OH)2 on the chalcopyrite surface when Mg concentration was 10−2 M and pulp pH was 10. View Full-Text
Keywords: chalcopyrite; flotation; chlorides; zeta potential; contact angle chalcopyrite; flotation; chlorides; zeta potential; contact angle

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Li, Y.; Li, W.; Xiao, Q.; He, N.; Ren, Z.; Lartey, C.; Gerson, A.R. The Influence of Common Monovalent and Divalent Chlorides on Chalcopyrite Flotation. Minerals 2017, 7, 111.

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