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| Reaction Mechanism of Antimony Direct Smelting Applying Zinc Materials as Sulfur-fixing Agent |
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Received:May 08, 2016
Revised:May 11, 2016
Accepted:May 13, 2016
Published Online:September 20, 2016
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| DOI：doi：10.3969/j.issn.1007-7545.2016.10.001 |
| KeyWord:antimony metallurgy; sulfur-fixation smelting; reaction mechanism; low temperature molten salt |
| Author | Institution |
| WANG Yue-jun |
河套学院理学系 |
| CHEN Yong-ming |
中南大学冶金与环境学院 |
| XU Kang-ning |
河套学院理学系 |
| YE Long-gang |
中南大学冶金与环境学院 |
| Xue Hao-tian |
中南大学冶金与环境学院 |
| WANG Cai-hong |
河套学院理学系 |
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| Abstract: |
| Reaction mechanism of antimony direct smelting by reduction and sulfur-fixing reaction between Sb2S3 and ZnO in Na2CO3-NaCl molten salt was investigated. The results of thermodynamic calculation indicate that sulfur-fixing reaction can completely proceed at 400 ℃ above, CO% from gasification reaction of carbon can meet reduction and sulfur-fixing reaction even when mole concentration of Sb2S3 and ZnO in melt is both as low as 0.0001. In Sb2S3-ZnO-C system, sulfur-fixing reaction is divided into two steps, reaction between Sb2S3 and ZnO to produce Sb2O3 and ZnS firstly, and then consecutive reduction of Sb2O3 to Sb by addition of reductive agent. SO2 smoke is discharged in form of ZnS. |
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