Limits of the CIL circuit in copper-gold plants

Burns, Fraser, Peng, Yongjun, Seaman, David and Bradshaw, Dee (2014) Limits of the CIL circuit in copper-gold plants. Minerals Engineering, 55 132-137. doi:10.1016/j.mineng.2013.10.008

Author Burns, Fraser
Peng, Yongjun
Seaman, David
Bradshaw, Dee
Title Limits of the CIL circuit in copper-gold plants
Journal name Minerals Engineering   Check publisher's open access policy
ISSN 0892-6875
Publication date 2014-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.mineng.2013.10.008
Open Access Status
Volume 55
Start page 132
End page 137
Total pages 6
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Language eng
Subject 1909 Geotechnical Engineering and Engineering Geology
2210 Mechanical Engineering
1600 Chemistry
2207 Control and Systems Engineering
Abstract This study examined the performance of the CIL (Carbon-in-Leach) circuit at Telfer, a copper-gold plant treating porphyry copper deposits containing gold associated with both copper and iron sulphides, with an objective to identify factors normally limiting the gold recovery in the CIL circuit in the presence of a small amount of copper after copper flotation, and then propose a means to improve it. Diagnostic leaching assessment and mineralogical analysis by MLA revealed that the occlusion of gold by other minerals and the fine grain size of gold associated with them may be the contributing factors to the low gold recovery in the CIL circuit. Fine grinding of the CIL feed increased gold recovery significantly from the leaching process. However, it is interesting to find that fine grinding increased the amount of released copper ions which complex with cyanide resulting in significantly higher cyanide consumption. It is therefore proposed that regrinding of the CIL feed followed by copper flotation is an appropriate pre-treatment method for the CIL circuit.
Keyword Cyanide consumption
Cyanide soluble copper
Refractory gold
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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