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
1872-9444
Publication date 2011-12-01
Year available 2011
Sub-type Article (original research)
DOI 10.1016/j.mineng.2011.09.007
Open Access Status Not yet assessed
Volume 24
Issue 15
Start page 1687
End page 1693
Total pages 7
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Language eng
Subject 2207 Control and Systems Engineering
1600 Chemistry
1909 Geotechnical Engineering and Engineering Geology
2210 Mechanical Engineering
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
Chalcopyrite
Bentonite
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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Created: Fri, 30 Dec 2011, 08:34:46 EST by Dr Yongjun Peng on behalf of School of Chemical Engineering