Effect of regrinding conditions on pyrite flotation in the presence of copper ions

Chen, Xumeng, Peng, Yongjun and Bradshaw, Dee (2013) Effect of regrinding conditions on pyrite flotation in the presence of copper ions. International Journal of Mineral Processing, 125 129-136. doi:10.1016/j.minpro.2013.08.007


Author Chen, Xumeng
Peng, Yongjun
Bradshaw, Dee
Title Effect of regrinding conditions on pyrite flotation in the presence of copper ions
Journal name International Journal of Mineral Processing   Check publisher's open access policy
ISSN 0301-7516
Publication date 2013-12-10
Sub-type Article (original research)
DOI 10.1016/j.minpro.2013.08.007
Volume 125
Start page 129
End page 136
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2014
Language eng
Formatted abstract
Highlights
• Regrinding conditions affected pyrite flotation in the cleaner stage in the presence of Cu2 +.
• Pyrite flotation was depressed after regrinding with both stainless and mild steel media.
• An additional amount of collector increased pyrite flotation to some extent.
• Further adding Cu2 + decreased or increased pyrite flotation depending on the medium type.
• Pyrite flotation is governed by the modified property of the carried and new created surfaces.

In this study, the effect of regrinding conditions on copper activation on the pyrite surface and subsequent pyrite flotation in the cleaner stage was investigated. Pyrite was activated by copper ions during primary grinding, and the rougher flotation concentrate was reground in a tumbling mill prior to the cleaner flotation. The regrinding condition was manipulated by two types of grinding media, stainless steel and mild steel. It was found that pyrite flotation in the cleaner stage was depressed especially when mild steel media was used during regrinding. An additional amount of collector improved pyrite flotation especially when stainless steel media was used during regrinding. An additional amount of copper ions further increased pyrite flotation after regrinding with mild steel media but decreased pyrite flotation after regrinding with stainless steel media. XPS (X-ray photoelectron spectroscopy) analyses and EDTA (ethylene diamine tetraacetic acid) extraction revealed that the different response of pyrite flotation in the cleaner stage to stainless steel and mild steel media used during regrinding was associated with the modified property of the Cu-activated pyrite surface carried from the rougher flotation concentrate and the new pyrite surface created during regrinding.
Keyword Regrinding
Pyrite flotation
Copper activation
Carried surface
Fresh surface
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Julius Kruttschnitt Mineral Research Centre Publications
School of Chemical Engineering Publications
Official 2014 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 6 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 8 times in Scopus Article | Citations
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Created: Mon, 16 Dec 2013, 14:44:02 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre