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| Comprehensive Recovery of Valuable Metals from Gold-bearing High-arsenic Sulfur Concentrates |
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Received:March 05, 2015
Revised:March 06, 2015
Accepted:March 10, 2015
Published Online:July 17, 2015
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| DOI：doi：10.3969/j.issn.1007-7545.2015.08.012 |
| KeyWord:gold-bearing high-arsenic sulfur concentrates; two-stage roasting; arsenic removal; chloride volatilization; iron pellet |
| Author | Institution |
| GUO Chi-hao |
北京矿冶研究总院 |
| XU Xiao-hui |
北京矿冶研究总院 |
| CHANG Yao-chao |
北京矿冶研究总院 |
| WEI Qi-jin |
北京矿冶研究总院 |
| HU Lei |
北京矿冶研究总院 |
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| Abstract: |
| Valuable metals were comprehensively recovered from gold-bearing high-arsenic sulfur concentrates with high-temperature two-stage roasting followed by chloride volatilization. The results show that arsenic and sulfur removal rate is 97.6% and 99% respectively under the optimum two-stage roasting conditions including 700 ℃ weak oxidation atmosphere for the first stage and 850 ℃ oxidation atmosphere for the second stage. Volatilization rate of gold, silver, lead and zinc is 96.5%, 73.3%, 94.6% and 75.3% respectively, iron pellets compressive strength is 2 500 N above with iron grade of 60% above under the optimum chloride volatilization conditions including grinding size of calcine of 73% -0.038 mm, CaCl2 dosage of 5%, bentonite dosage of 2%, chloride roasting temperature of 1 250 ℃, and time of 2 h. |
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