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| Effect of Manganese Dioxide on Leaching Behavior of Chalcopyrite |
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Received:July 04, 2019
Revised:July 05, 2019
Accepted:July 08, 2019
Published Online:October 23, 2019
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| DOI：doi：10.3969/j.issn.1007-7545.2019.11.001 |
| KeyWord:hydrometallurgy; chalcopyrite; manganese dioxide; promotion |
| Author | Institution |
| BAI Yun-long |
东北大学 冶金学院 |
| XIE Feng |
东北大学 冶金学院 |
| WANG Wei |
东北大学 冶金学院 |
| JIANG Kai-xi |
北京矿冶科技集团有限公司 |
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| Abstract: |
| A common problem of slow leaching rate exists in atmospheric pressure leaching of chalcopyrite. When MnO2 exists in solution, galvanic interaction between minerals provides a way for oxidation of chalcopyrite, which makes it possible to improve leaching rate of chalcopyrite. Effect of MnO2 on oxidative leaching of chalcopyrite in H2SO4 solution and H2SO4-Fe2(SO4)3 solution was studied respectively. The results show that leaching of chalcopyrite is promoted in presence of MnO2, and MnO2 decomposes rapidly. A metal-deficient passivate layer is formed and wrapped on chalcopyrite surface, which hinder leaching of chalcopyrite. |
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