The effect of surface oxidation of copper sulfide minerals on clay slime coating in flotation

Peng, Yongjun and Zhao, Shengli (2011) The effect of surface oxidation of copper sulfide minerals on clay slime coating in flotation. Minerals Engineering, 24 15: 1687-1693. doi:10.1016/j.mineng.2011.09.007

Author Peng, Yongjun
Zhao, Shengli
Title The effect of surface oxidation of copper sulfide minerals on clay slime coating in flotation
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
Publication date 2011-12
Sub-type Article (original research)
DOI 10.1016/j.mineng.2011.09.007
Volume 24
Issue 15
Start page 1687
End page 1693
Total pages 7
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Collection year 2012
Language eng
Abstract The industry is well aware of the difficulty in treating copper ores in the presence of clay minerals. In this study, the effect of bentonite on the flotation of chalcopyrite (a primary copper sulfide mineral) and chalcocite (a secondary copper sulfide mineral) was investigated in terms of surface coating. Based on the flotation of copper ores containing both chalcopyrite and chalcocite, the flotation of chalcopyrite and chalcocite single minerals in the presence and absence of bentonite, and the zeta potential measurement of chalcopyrite, chalcocite and bentonite, it was found that the oxidation of chalcopyrite and chalcocite had a different effect on their interaction with bentonite. Under the normal grinding and flotation condition, significant oxidation occurred on the surface of chalcocite which was electrostatically attractive to bentonite resulting in bentonite slime coating and the depressed flotation of chalcocite. The reduction of oxidation on chalcocite could mitigate bentonite slime coating due to electrostatic repulsion between unoxidized chalcocite and bentonite. Unlike chalcocite, chalcopyrite with and without surface oxidation exhibited an electrostatic repulsion to bentonite. Its flotation was less affected by bentonite slimes.
Keyword Chalcocite
Slime coating
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2012 Collection
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Citation counts: TR Web of Science Citation Count  Cited 18 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 25 times in Scopus Article | Citations
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Created: Thu, 29 Dec 2011, 22:34:46 EST by Dr Yongjun Peng on behalf of School of Chemical Engineering