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| Arsenic Removal and Recovery of Gold and Silver by Chloridizing Roasting from High Arsenic-bearing Pyrite Cinder |
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Received:December 25, 2014
Revised:January 04, 2015
Accepted:January 05, 2015
Published Online:May 20, 2015
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| DOI：doi：10.3969/j.issn.1007-7545.2015.06.012 |
| KeyWord:pyrite cinder; high temperature chlorination; arsenic; recovery; gold; silver |
| Author | Institution |
| Chang Yaochao |
北京矿冶研究总院冶金所 |
| Xu Xiaohui |
北京矿冶研究总院冶金所 |
| Wang Yun |
北京矿冶研究总院工程公司 |
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| Abstract: |
| Acid leaching-high temperature chlorination process is used to remove arsenic and recover gold and silver from high arsenic-bearing pyrite cinder. The results show that iron grade in roasted pellet is 55% above, contents of As, S, Cu, Pb, Zn in pellet are 0.32%, 0.011%, 0.057%, 0.11%, and 0.38% respectively under the optimum conditions including sulfuric acid concentrate of 30 g/L, particle size of -0.037 mm of 81.87%, dosage of CaCl2 of 5%, bentonite dosage of 2%, roasting temperature of 1 200 ℃, and roasting time of 2h. Roasted pellet intensity is 2.5 kN above. Arsenic deposition rate is 96.7% when Na2S addition is three times of theoretical amount. |
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