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| Column Bioleaching of Low-grade Uranium Ore |
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Received:December 14, 2011
Revised:December 14, 2011
Accepted:December 15, 2011
Published Online:May 31, 2012
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| DOI：10.3969/j.issn.1007-7545.2012.06.011 |
| KeyWord:low-grade uranium ore; column bioleaching; spray liquid quantity; leaching rate; acid consumption rate |
| Author | Institution |
| LiJiang |
东华理工大学 |
| LiuYajie |
东华理工大学 |
| Zhouguchun |
东华理工大学 |
| CheJianghua |
东华理工大学 |
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| Abstract: |
| Column bioleaching of a low-grade uranium ore with a variety of spraying methods was carried out. The results show that the mixed culture of acidophilic microorganisms in use have a high adaptation to the uranium minerals, and the average uranium leaching rates are 87.70% and 88.53%, the acid consumption is 5.36% and 5.37% within 172 days, at 5% and 10% spraying condition, respectively. A bigger spray liquid quantity could increase uranium leaching rate at the bioleaching stage, however, the ratio of liquid to solid rises greatly as well, which resulted in a rise of cost for uranium recovery. Therefore, the optimum spray liquid quantity should be confirmed with a consideration of both uranium recovery and leaching cost. |
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