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| Process Optimization on Heap Bioleaching of Low-Grade Secondary Copper Sulfide |
| Received:August 14, 2017 Revised:August 15, 2017 |
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| DOI：doi：10.3969/j.issn.1007-7545.2018.01.001 |
| KeyWord:low-grade secondary copper sulfide; heap bioleaching; particle size; heap height |
| Author | Institution |
| wu zengling |
厦门紫金矿冶技术有限公司 |
| LAI Xiao-kang |
厦门紫金矿冶技术有限公司 |
| ZHANG Peng |
厦门紫金矿冶技术有限公司 |
| ZHANG Xing-xun |
厦门紫金矿冶技术有限公司 |
| KANG Jin-cheng |
厦门紫金矿冶技术有限公司 |
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| Abstract: |
| To address long leaching duration in bioleaching of low-grade secondary copper sulfide ore, column and industrial bioleaching tests for effects of different particle size and heap height on leaching rates of copper and iron were carried out. The results show that copper leaching rate rises with decreasing of particle size, and iron leaching rate remains stable. Improving heap height has positive effect on temperature retention and copper extraction with the same particle size. After leaching for 194 days, copper extraction rate is 62.67% with particle size of -40 mm, which is 10 percent point higher than that with particle size of -80 mm. |
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