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| Fundamental Research on Slag Type of Zinc Leaching Residue with Lead Concentrate in Lead Smelting by Side Blowing Reduction |
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Received:February 02, 2021
Revised:February 07, 2021
Accepted:February 22, 2021
Published Online:May 20, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.06.002 |
| KeyWord:side blowing; collocation smelting; high-lead slag; melting temperature; thermodynamics |
| Author | Institution |
| YANG Wei |
云南驰宏锌锗股份有限公司矿冶研究院 |
| HE Yong-yi |
云南驰宏锌锗股份有限公司矿冶研究院 |
| DAI Long-guo |
云南驰宏锌锗股份有限公司矿冶研究院 |
| LI Yu-hu |
江西理工大学冶金工程学院 |
| ZHANG Zhong-tang |
江西理工大学冶金工程学院 |
| CAO Cai-fang |
江西理工大学冶金工程学院 |
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| Abstract: |
| Phase diagrams of FeO-Fe2O3-SiO2-CaO-ZnO-PbO slag system were calculated with FactSage thermodynamics software. Effects of temperature, Fe/SiO2 (mass fraction), CaO/SiO2 (mass fraction), ZnO content, and PbO content on melting temperature and liquid phase generation zone of slag were investigated. Thermodynamic analysis shows that melting temperature of slag drops with increase of Fe/SiO2, and drops first and rises later with increase of CaO/SiO2. When ZnO content in slag is 10%-18%, melting temperature of slag varies greatly. However, liquid phase area of slag shows a decreasing trend as content of ZnO rises. Under the premise of ensuring smooth progress of smelting process, content of ZnO in slag can be controlled to be lower than 12%. Verification experiment shows that under the conditions of 1 200-1 250 ℃, CaO/SiO2=0.5, Fe/SiO2=0.8, and ZnO content of 12%, treating of liquid high-lead slag using side blowing reduction smelting can proceed smoothly, metal direct recovery rate during reduction is 85%, and lead content in reduced slag is 2.06%. |
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