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| Process Comparison of Biological Oxidation and Thermal Compression Oxidation for Refractory Gold Concentrate |
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Received:August 02, 2019
Revised:August 28, 2019
Accepted:August 29, 2019
Published Online:November 18, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.12.010 |
| KeyWord:arsenic; carbon; refractory gold concentrate; biological oxidation; hot press oxidation |
| Author | Institution |
| Xing Qingqing |
青海省金矿资源开发工程技术研究中心 |
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| Abstract: |
| Directly cyanide leaching rate of refractory gold concentrate of high arsenic and carbon, poor sulfur, and fine grain is only about 42%. Gold leaching rate is 96.3% by adopting biological pre-oxidation and cyanide leaching process. Gold leaching rate is 99.66% by adopting pre-oxidation at medium temperature and pressure, and three-stage cyanide leaching process. Three pretreatment processes of biological oxidation, hot compression oxidation and roasting oxidation are compared and analyzed. The results show that biological oxidation process has the advantages of low investment, low cost, high recovery rate of gold and silver, and good economic benefit. |
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