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| Study on Two Technologies of Pressure Leaching on Zinc Leaching Residue |
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Received:November 11, 2021
Revised:November 16, 2021
Accepted:November 19, 2021
Published Online:March 15, 2022
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| DOI：doi：10.3969/j.issn.1007-7545.2022.04.004 |
| KeyWord:zinc hydrometallurgy; goethite; jarosite; pressure leaching |
| Author | Institution |
| WU Jun |
云南云铜锌业股份有限公司昆明 |
| ZENG Peng |
云南云铜锌业股份有限公司昆明 |
| ZHOU Zhong-hua |
云南云铜锌业股份有限公司昆明 |
| IAN Yan |
云南云铜锌业股份有限公司昆明 |
| QIU Wei-jia |
云南云铜锌业股份有限公司昆明 |
| ZHANG Shao-bo |
云南云铜锌业股份有限公司昆明 |
| YANG Quan-sheng |
云南云铜锌业股份有限公司昆明 |
| WANG Yu |
云南云铜锌业股份有限公司昆明 |
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| Abstract: |
| Experimental study on two technologies of pressure leaching on zinc leaching residue were studied. “The reduction pressure leaching + oxygen pressure leaching” was replaced a part of the technology of goethite, its slag yield is 15.74%, and leaching rate of Zn, Fe, Cu, In, and Mg is 99.32%, 93.50% , 95.02%, 91.03%, and 99.97%, respectively. All indexes are better than that of the original process, leaching rate of zinc and indium rises by 1.82 and 11.03 percentage points respectively, reaction time shortens from 14 h to 4 h, and the number of liquid-solid separation reduces from 4 times to 2 times. “Two counter current pressure leaching” was replaced a part of the technology of jarosite, its slag yield is 35.88%, and leaching rate of Zn, Fe, Cu, In, and Mg is 98.50%, 4.94%, 90.48%, 2.69%, and 93.77%, respectively. All indexes are better than that of the original process, the leach solution can be reused in neutral leaching directly, reaction time shortens from 16 h to 4 h, and the number of liquid-solid separation reduces from 3 times to 2 times. Pressurized leaching adopts closed autoclave, which is easier to realize steam balance of whole zinc smelting system without additional steam boiler |
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