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| Column Bioleaching of Tailings from Copper Mine and Its Leaching Kinetics |
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Received:April 01, 2020
Revised:April 01, 2020
Accepted:April 06, 2020
Published Online:August 17, 2020
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| DOI：doi：10.3969/j.issn.1007-7545.2020.09.016 |
| KeyWord:copper; zinc; column bioleaching; kinetics |
| Author | Institution |
| MAO Yu |
西南科技大学固体废物处理与资源化教育部重点实验室 四川绵阳 |
| FU Kai-bin |
西南科技大学固体废物处理与资源化教育部重点实验室 四川绵阳 |
| ZHONG Qiu-hong |
西南科技大学固体废物处理与资源化教育部重点实验室 四川绵阳 |
| WANG Lei |
西南科技大学固体废物处理与资源化教育部重点实验室 四川绵阳 |
| HOU Pu-yao |
西南科技大学固体废物处理与资源化教育部重点实验室 四川绵阳 |
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| Abstract: |
| Valuable metals were recovered from tailings of a copper mine by two-stage column bioleaching. Effects of pretreatment acidity, inoculation quantity, loading mode of tailing and waste rock, and particle size of waste rock on copper and zinc leaching were investigated. The results show that copper leaching rate is 30% above regardless of change of inoculation amounts and pretreatment acidity. Leaching rate of copper and zinc is 38.8% and 87.45% respectively under the conditions including pretreatment acidity of 5% dilute sulfuric acid, inoculation of 10%, and particle size of waste rock of -2 mm. Permeability of column is not effectively improved by different loading methods. The results of kinetics models of copper and zinc leaching in column leaching system show that leaching of copper and zinc accords with internal diffusion control model. |
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