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| Study on Tellurium Recovery from Water Leached Residue of Tellurium Slag |
| Received:February 26, 2013 Revised:February 27, 2013 |
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| DOI：10.3969/j.issn.1007-7545.2013.08.011 |
| KeyWord:tellurium slag; water leached residue; tellurium; recovery; potential control reduction |
| Author | Institution |
| WU Wen-hua |
湖南稀土金属材料研究院 |
| LIU Ji-bo |
湖南稀土金属材料研究院 |
| SU Zheng-fu |
湖南稀土金属材料研究院 |
| WANG Zhi-jian |
湖南稀土金属材料研究院 |
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| Abstract: |
| Tellurium was recovered from water leached residue of tellurium slag with acid leaching and potential control reduction process. The results show that tellurium leaching rate is 98.5% under the acid leaching conditions including hydrochloric acid concentration of 2.5 mol/L, reaction time of 4 h, temperature of 75 ℃, and ratio of liquid to solid of 5∶1. The tellurium reduction rate is 94.28% and tellurium content in reduction slag is 70.25% under the potential control reduction conditions including reductant dosage of 2 times of theoretical amount, dropping time of 45 min, holding time of 45 min, and end point electric potential of ~290 mV. |
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