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| Recovery of Gold and Silver from Valuable Metal Bearing Pyritic Concentrate by Chlorination Volatilization Method |
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Received:July 25, 2019
Revised:July 30, 2019
Accepted:July 31, 2019
Published Online:November 18, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.12.009 |
| KeyWord:pyritic concentrate; oxidation roasting; chlorination volatilization; gold and silver recovery; pelletize |
| Author | Institution |
| liuhuinan |
北京矿冶科技集团有限公司 |
| Huyangjia |
北京矿冶科技集团有限公司 |
| Wuguiye |
北京矿冶科技集团有限公司 |
| Zhaozhiqiang |
北京矿冶科技集团有限公司 |
| Hezheng |
北京矿冶科技集团有限公司 |
| Liuchongjun |
北京矿冶科技集团有限公司 |
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| Abstract: |
| Following the process of oxidation roasting, grinding and pelletizing, and chlorination volatilization, laboratory tests and scale-up pilot tests were carried out for recovering valuable metals from pyrite concentrate. Removal rate of arsenic and sulphur in oxidation roasting tests is 82.39% and 99.99%, respectively, and volatilization recovery of gold, silver and copper in chlorination volatilization tests is 96.37%, 85.97% and 70.61%, respectively, under the optimum conditions of laboratory test including oxidation roasting temperature of 700 ℃, roasting time of 1.0 h, dosage of calcium chloride of 7.0%, particle size of 70% -0.038 mm, chlorination volatilization temperature of 1 100 ℃, and chlorination volatilization time of 1.0 h. While during scale-up pilot tests, chlorination volatilization recovery of gold, silver and copper reaches 96.72%, 90.91% and 52.48% respectively. |
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