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| Practice and Optimization on Acid and Iron Balance in Industrial Heap Bioleaching of Zijinshan Copper Mine |
| Received:May 21, 2021 Revised:June 01, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2021.10.002 |
| KeyWord:Zijinshan copper mine; heap bioleaching; digenite; pyrite; oxidation; acid and iron balance |
| Author | Institution |
| JIANG Cheng |
昆明理工大学 |
| JIA Yan |
中国科学院过程工程研究所 |
| SUN He-yun |
中国科学院过程工程研究所 |
| TAN Qiao-yi |
中国科学院过程工程研究所 |
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| Abstract: |
| Heap bioleaching, solvent extraction, and electro winning is applied in Zijinshan copper mine to produce copper cathode from low-grade ore. Digenite and covellite are the main copper minerals, and quite high amount of pyrite is also included in ore, while very low acid consumption gangue minerals are contained. During process of extracting valuable copper from heap bioleaching, pyrite will be also oxidized and dissolved into ferric sulfate and sulfuric acid, which result to adverse effect to solvent extraction, electro winning processes. Main technique traits of Zijinshan heap bioleaching practice were introduced. Industrial practices, including high acid/iron concentration leaching system and low acid/iron concentration leaching system, and how they influence acid/iron balance in industrial system were introduced. Based on mineralogy properties and especially pyrite oxidation processes, influence of pyrite oxidation and parameters to acid/iron balance of Zijinshan heap bioleaching is analyzed. Strategies for future acid and iron balance are proposed. |
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