Effect of feed preparation on copper activation in flotation of Mt Keith pentlandite

Peng, Y. J. and Seaman, D. (2012) Effect of feed preparation on copper activation in flotation of Mt Keith pentlandite. Transactions of the Institutions of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy, 121 3: 131-139. doi:10.1179/1743285512Y.0000000006

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Author Peng, Y. J.
Seaman, D.
Title Effect of feed preparation on copper activation in flotation of Mt Keith pentlandite
Journal name Transactions of the Institutions of Mining and Metallurgy, Section C: Mineral Processing and Extractive Metallurgy   Check publisher's open access policy
ISSN 0371-9553
1743-2855
Publication date 2012
Sub-type Article (original research)
DOI 10.1179/1743285512Y.0000000006
Volume 121
Issue 3
Start page 131
End page 139
Total pages 9
Place of publication Leeds, W. Yorks., United Kingdom
Publisher Maney Publishing
Collection year 2013
Language eng
Abstract In this work, the effect of copper sulphate on the flotation of Mt Keith pentlandite ores was studied. As Mt Keith operates separate size flotation circuits, e.g. slime (−8 μm), fine (−25 μm) and coarse (−160 μm) circuits, tests were conducted on streams of different particle size distributions prepared with the use of cyclones. The flotation response with and without the addition of copper sulphate was examined, first, on feed streams prepared by a laboratory grinding mill and cyclone and, second, on streams collected directly from the plant. It was found that copper sulphate had an adverse effect on flotation performance when the flotation feeds were prepared in the laboratory. In the flotation of slime-fine fractions that combined slime and fine particles, the addition of copper sulphate depressed nickel flotation while increasing gangue entrainment. In the flotation of coarse fractions, the addition of copper sulphate depressed nickel flotation without affecting gangue entrainment. However, when samples were collected directly from the plant streams and floated in a laboratory flotation cell, the addition of copper sulphate increased nickel recovery without affecting gangue entrainment in the flotation of slime, fine and coarse fractions. To explain this discrepancy, pulp chemistries in the two different types of tests were compared. It was found that the plant mills at Mt Keith produced a much more reducing grinding environment than the laboratory mill. This might contribute to the completely different behaviour which copper sulphate exhibited on flotation performance. This study also demonstrates the importance in considering plant pulp chemistry during research development in a laboratory.
Keyword Pentlandite
Serpentine
Copper activation
Froth stability
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 28 May 2012

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
School of Chemistry and Molecular Biosciences
 
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Created: Wed, 04 Jul 2012, 13:58:00 EST by Dr Yongjun Peng on behalf of School of Chemical Engineering