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| Effect and Solution of Copper Oxide Dissolution on Cyanide Leaching Process of Copper-bearing Gold Ore |
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Received:February 02, 2015
Revised:February 05, 2015
Accepted:February 09, 2015
Published Online:July 17, 2015
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| DOI：doi：10.3969/j.issn.1007-7545.2015.08.013 |
| KeyWord:copper-bearing gold ore; gold; cyanidation; gold selective leaching |
| Author | Institution |
| Qiu Xianyang |
广州有色金属研究院;稀有金属分离与综合利用国家重点实验室 |
| Songbaoxu |
广州有色金属研究院;稀有金属分离与综合利用国家重点实验室 |
| Hu Zhen |
广州有色金属研究院;稀有金属分离与综合利用国家重点实验室 |
| He Bin |
云南黄金矿业集团股份有限公司 |
| Gao Qifang |
云南黄金矿业集团股份有限公司 |
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| Abstract: |
| Gold leaching rate of copper-bearing gold ore by cyanide leaching was only 88.21% due to dissolution of copper minerals, whose leaching rate is about 19%. In order to reduce effect of dissolution of copper minerals on cyanidation leaching, a novel technology to weaken copper minerals dissolution by “carefully controlling concentrations of dissociative cyanide ions” was put forward. Concentrations of dissociative cyanide ions were controlled by fractional adding of sodium cyanide. Industry application results show that copper leaching rate drops to 1.93% and gold leaching rate significantly rises to 93.40% without a big change of original technological process. |
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