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| Separation of Mo, W, S and Bi from Low-grade Bismuth Polymetallic Concentrate by Pressure Alkali Leaching |
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Received:June 21, 2024
Revised:June 24, 2024
Accepted:July 01, 2024
Published Online:September 11, 2024
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| DOI：doi：10.3969/j.issn.1007-7545.2024.10.008 |
| KeyWord:low-grade bismuth polymetallic concentrate; pressure alkaline leaching; high efficiency separation |
| Author | Institution |
| HE Luhua |
长沙矿冶研究院有限责任公司 |
| PENG Jun |
长沙矿冶研究院有限责任公司 |
| SHEN Yujun |
长沙矿冶研究院有限责任公司 |
| LIU Qiang |
长沙矿冶研究院有限责任公司 |
| ZHOU Xiaozhou |
长沙矿冶研究院有限责任公司 |
| ZHU Anyu |
长沙矿冶研究院有限责任公司 |
| WANG Yuanzhi |
长沙矿冶研究院有限责任公司 |
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| Abstract: |
| Address to poor adaptability of traditional smelting methods to raw materials like bismuth concentrate, especially unsuitable for low-grade bismuth concentrate, low comprehensive recovery rate of valuable metals, difficult treatment of low concentration SO2 produced by pyrometallurgy, and high cost, a new process for separating molybdenum, tungsten, sulfur and bismuth by pressure oxidation alkaline leaching was proposed using low grade bismuth polymetallic concentrate of Shizhuyuan as raw material. The effects of alkali dosage, time, temperature, total pressure and liquid-solid ratio on the leaching rate of molybdenum, tungsten, sulfur and bismuth were studied. Under the optimum conditions, the leaching rate of molybdenum, tungsten and sulfur is 99.73%, 90.81% and 97.69% respectively, while bismuth remains un-leached and is enriched in the slag, which realizes the efficient separation of molybdenum, tungsten, sulfur and bismuth in low-grade bismuth polymetallic concentrates. |
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