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| Extraction and Preparation of Tellurium Dioxide from Copper Telluride Slag |
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Received:May 28, 2018
Revised:May 28, 2018
Accepted:June 01, 2018
Published Online:September 19, 2018
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| DOI：doi：10.3969/j.issn.1007-7545.2018.10.011 |
| KeyWord:copper telluride slag; sodium chlorate; tellurium dioxide |
| Author | Institution |
| WU Xing-lin |
紫金铜业有限公司 |
| Zhong Shui-ping |
厦门紫金矿冶设计有限公司 |
| Luo Ren-kun |
紫金铜业有限公司 |
| Chen Hang |
厦门紫金矿冶设计有限公司 |
| Zhang Huan-ran |
紫金铜业有限公司 |
| Wang Jun-e |
厦门紫金矿冶设计有限公司 |
| Lin Hong-fu |
紫金矿业集团股份有限公司 |
| Wu Jian-hui |
紫金矿业集团股份有限公司 |
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| Abstract: |
| TeO2 was prepared from copper telluride slag by copper leaching with sodium chlorate and sulfuric acid, tellurium leaching with sodium hydroxide, and tellurium precipitation with neutralization. The results shows that leaching rates of copper and tellurium is 99.33% and 10.58% respectively under the conditions including dosage of sodium chlorate of 0.5 time of copper telluride slag, sulfuric acid concentration of 70 g/L, reaction temperature of 80 ℃, L/S of 5, and reaction time of 2 h. Leaching rate of tellurium with alkaline is 99.13% under the conditions including temperature of 90 ℃, L/S of 5, and reaction time of 2 h. Tellurium neutralization precipitation rate is 100% at pH value of 5.5 adjusted by vitriol. Precipitation product is tellurium dioxide with tellurium content of 75.76%. |
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