The development of regrind–flotation pre-treatment of the CIL feed in copper–gold plants

Burns, Fraser, Peng, Yongjun, Seaman, David and Bradshaw, Dee (2014) The development of regrind–flotation pre-treatment of the CIL feed in copper–gold plants. Powder Technology, 258 60-65. doi:10.1016/j.powtec.2014.03.022

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Author Burns, Fraser
Peng, Yongjun
Seaman, David
Bradshaw, Dee
Title The development of regrind–flotation pre-treatment of the CIL feed in copper–gold plants
Journal name Powder Technology   Check publisher's open access policy
ISSN 0032-5910
Publication date 2014-05-01
Sub-type Article (original research)
DOI 10.1016/j.powtec.2014.03.022
Open Access Status
Volume 258
Start page 60
End page 65
Total pages 6
Place of publication Lausanne, Switzerland
Publisher Elsevier
Language eng
Formatted abstract
• Regrind–flotation is effective prior to the CIL circuit in copper–gold plants.
• This new method recovers copper minerals that are not readily leachable.
• It also recovers cyanide consumable copper minerals.
• Compared to regrind alone, this method increases total copper recovery.
• It also reduces cyanide consumption from the CIL circuit.

This study focused on the development of a new method, regrind–flotation pre-treatment, to improve the performance of the CIL (Carbon-in-Leach) circuit at copper–gold concentrators. Occlusion of gold by iron sulphide gangue minerals and the fine grain size of gold associated with them contribute to the low gold recovery in the CIL circuit. Fine grinding of the CIL feed increased gold recovery significantly from the leaching process. However, fine grinding increased the amount of liberated copper which is cyanide soluble resulting in significantly higher cyanide consumption. A proposed method of regrinding of the CIL feed followed by copper flotation was developed as an appropriate pre-treatment method for the CIL circuit that increased gold recovery while reducing cyanide consumption related to the presence of copper.
Keyword Regrinding
Refractory gold
Cyanide soluble copper
Cyanide consumption
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 2015 Collection
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Citation counts: TR Web of Science Citation Count  Cited 1 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 1 times in Scopus Article | Citations
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Created: Mon, 24 Mar 2014, 08:13:53 EST by Dr Yongjun Peng on behalf of Julius Kruttschnitt Mineral Research Centre