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| Experiment on Sulfuric Acid Curing Leaching of Zinc Powder Replacement Residue |
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Received:June 06, 2019
Revised:June 13, 2019
Accepted:June 13, 2019
Published Online:October 23, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.11.004 |
| KeyWord:zinc powder replacement residue; sulfuric acid curing; leaching |
| Author | Institution |
| Zhang Wei |
深圳市中金岭南有色金属股份有限公司丹霞冶炼厂 |
| Zhou Kehua |
深圳市中金岭南有色金属股份有限公司丹霞冶炼厂 |
| Wu Caigui |
深圳市中金岭南有色金属股份有限公司丹霞冶炼厂 |
| ZHANG Deng-kai |
深圳市中金岭南有色金属股份有限公司丹霞冶炼厂 |
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| Abstract: |
| Effects of ratio of concentrated sulfuric acid volume to mass of replacement residue, curing temperature, curing time and leaching acidity on extraction of Ga, Ge, Cu and Zn and filtration property during sulfuric acid curing leaching of zinc powder replacement residue were investigated. The results show that sulfuric acid curing can solve problem of difficult filtration caused by silica gel in conventional leaching of zinc powder replacement slag. Meanwhile, extraction rate of Ga, Cu and Zn is all 97% above, and Ge extraction rate is 70% above. Volatilization rate of Ge is 85% above when leaching residue is reduced and volatilized at 1 000 ℃ above. |
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