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| Continuous Pilot Experiment of Pressure Pre-oxidation of Refractory Gold Ore |
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Received:January 05, 2021
Revised:January 18, 2021
Accepted:January 18, 2021
Published Online:May 20, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.06.011 |
| KeyWord:refractory gold ore; pressure pre-oxidation; continuous pilot experiment |
| Author | Institution |
| CAI Chuang-kai |
紫金矿业集团股份有限公司 |
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| Abstract: |
| Guizhou Shuiyindong Gold Mine is a “Carlin-type” refractory gold mine containing arsenic and carbon, which cannot produce benefits through conventional processing. In order to develop this type of gold resources, through process comparison, the pressurized pre-oxidation process is selected for experimental research. Test results of multi-factor laboratory study show that sulfur oxidation rate is >99% and gold leaching rateis >94% under the recommended conditions. In order to obtain research data required by industrial design, a set of pressurized pre-oxidation pilot system with continuous feeding is built independently and pilot test is successfully completed. Under the conditions of pressurized oxidation at 210—220 ℃ for 60-90 min with oxygen partial pressure of 0.6-0.8 MPa, average oxidation rate of sulfur is higher than 97% and average leaching rate of gold is 96%, which verifies the conclusion of laboratory research and opens up the overall process flow. It provides an important design basis for industrial application of this process. |
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