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| Effect of Microwave Chlorination Roasting on Leaching of Low-grade Uranium Ore |
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Received:May 31, 2021
Revised:June 04, 2021
Accepted:June 08, 2021
Published Online:July 29, 2021
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| DOI：doi：10.3969/j.issn.1007-7545.2021.08.014 |
| KeyWord:low-grade uranium ore; microwave; chlorination roasting; acid leaching |
| Author | Institution |
| LIAO Bing-you |
东华理工大学核资源与环境国家重点实验室 |
| WANG Xue-gang |
东华理工大学核资源与环境国家重点实验室 |
| LIU Chao |
东华理工大学核资源与环境国家重点实验室 |
| XU Su-bei |
东华理工大学核资源与环境国家重点实验室 |
| WANG Ting-jian |
东华理工大学核资源与环境国家重点实验室 |
| LIU Hong-wei |
东华理工大学核资源与环境国家重点实验室 |
| LONG Jie |
东华理工大学核资源与环境国家重点实验室 |
| WANG Shi-jun |
东华理工大学核资源与环境国家重点实验室 |
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| Abstract: |
| To address low leaching rate of low-grade uranium ore during traditional acid leaching process, microwave chlorination roasting pretreatment leaching test was carried out. Effects of chlorination agent type and dosage, microwave roasting temperature and time on uranium leaching rate were investigated. The results show that uranium leaching rate is 85.15% under the conditions including uranium content of ore of 0.0842%, ferric chloride addition of 25%, roasting temperature of 310 ℃, and roasting time of 60 min. Uranium leaching rate rises by 17.64% compared with acid leaching process. After microwave chlorination roasting, ore structure is destroyed, micro-cracks and pores are produced, which promote contact reaction between leaching agent and uranium, thus, improving leaching rate of uranium. |
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