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| Study of Crude Tellurium Reduction Precipitation by Sulfur Dioxide |
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Received:April 30, 2014
Revised:April 30, 2014
Accepted:May 04, 2014
Published Online:August 21, 2014
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| DOI：10.3969/j.issn.1007-7545.2014.09.015 |
| KeyWord:sulfur dioxide; crude tellurium; precipitation; copper anode slime |
| Author | Institution |
| Dong Hongjun |
西部矿业集团有限公司 |
| Jiang Xunxiong |
北京矿冶研究总院 |
| Fan Yanqing |
北京矿冶研究总院 |
| Zhang Denggao |
北京矿冶研究总院 |
| Wang Shengdong |
北京矿冶研究总院 |
| Feng Linyong |
北京矿冶研究总院 |
| Liu Wei |
北京矿冶研究总院 |
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| Abstract: |
| Crude tellurium was obtained by direct reduction precipitation from acid leachate of copper anode slime with sulfur dioxide as reductant. The results show that NaCl additive not only facilitates reduction of tellurium, but also promotes precipitation of copper. It is proposed that most of copper in solution be removed before tellurium precipitation. The grade of crude tellurium is 82.7% with precipitation ratio of tellurium of 99.03% under the optimum conditions including temperature of 80 ℃, NaCl dosage of 40 g/L, SO2 flow rate of 92.8 mL/min, and reduction time of 1.5 h. |
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