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| Experiment of Preparation of High Purity Tellurium with By-product Crude Selenium from Smelting Alkaline Slag |
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Received:June 02, 2020
Revised:June 03, 2020
Accepted:June 17, 2020
Published Online:July 17, 2020
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| DOI：doi：10.3969/j.issn.1007-7545.2020.08.014 |
| KeyWord:copper anode slime; static oxidation roasting; alkali leaching; leaching rate |
| Author | Institution |
| Fan Xing-xiang |
红河学院 |
| Li Ying-wei |
云南铜业股份有限公司西南铜业分公司 |
| Yang Kun-bin |
云南铜业股份有限公司西南铜业分公司 |
| Wang Jia-he |
昆明寰世科技开发有限公司 |
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| Abstract: |
| Phase composition of alkaline residue after extraction of precious metal from copper anode slime by pyrogenic process was analyzed. Process of alkaline leaching, purification and electrolytic preparation of high-purity tellurium was proposed. Influence of alkaline leaching on tellurium leaching rate and effects of technological parameters on tellurium purity were discussed. Through experiments, total tellurium recovery is 92.25%, and high-purity tellurium product meets the requirement of standard of YS/T 222—2010. After reduction of selenium solution by sulfur dioxide, crude selenium with selenium content of 96.56% and recovery of 90.17% is obtained. |
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