The oxidation of copper sulfide minerals during grinding and their interactions with clay particles

Zhao, Shengli and Peng, Yongjun (2012) The oxidation of copper sulfide minerals during grinding and their interactions with clay particles. Powder Technology, 230 112-117. doi:10.1016/j.powtec.2012.07.016


Author Zhao, Shengli
Peng, Yongjun
Title The oxidation of copper sulfide minerals during grinding and their interactions with clay particles
Journal name Powder Technology   Check publisher's open access policy
ISSN 0032-5910
1873-328X
Publication date 2012-07-11
Sub-type Article (original research)
DOI 10.1016/j.powtec.2012.07.016
Volume 230
Start page 112
End page 117
Total pages 6
Place of publication Lausanne, Switzerland
Publisher Elsevier
Collection year 2013
Language eng
Abstract In this study, the mechanism which underpins the different interaction of chalcopyrite, a primary copper sulfide mineral, and chalcocite, a secondary copper sulfide mineral, with bentonite, a clay mineral, during the grinding with stainless steel media was investigated by a range of techniques including XPS (X-Ray Photoelectron Spectroscopy) analysis, electrokinetic studies and Cryo-SEM (Scanning Electron Microscope) measurements. It was found that during grinding chalcocite was heavily oxidized but chalcopyrite was slightly oxidized. As a result of the different extent of mineral surface oxidation, chalcopyrite remained negatively charged but chalcocite became positively charged after grinding leading to the different interaction with bentonite particles. This study provides a guideline to improve the extraction of copper sulfide minerals in the presence of clay minerals, an important issue in mineral processing.
Keyword Copper sulfide mineral
Grinding
Oxidation
Clay
Coating
Particle interaction
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes In Press, Accepted Manuscript - Available online 11 July 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2013 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 13 times in Scopus Article | Citations
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Created: Sun, 15 Jul 2012, 03:15:07 EST by Dr Yongjun Peng on behalf of School of Chemical Engineering