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| Analysis of and Discussion on CO2 O2 In-situ Leaching of Uranium Process at Mengqiguer Deposit |
| Received:September 18, 2017 Revised:September 20, 2017 |
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| DOI：10.3969/j.issn.1007-7545.2018.03.013 |
| KeyWord:sandstone type uranium deposit; CO2 O2 in-situ leaching; chemical blocking; influence factors |
| Author | Institution |
| JI Hongbin |
东华理工大学 水资源与环境工程学院 |
| ZHOU Yipeng |
东华理工大学 水资源与环境工程学院 |
| SUN Zhanxue |
东华理工大学 水资源与环境工程学院 |
| YANG Yihan |
新疆中核天山铀业有限公司 |
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| Abstract: |
| Uranium leaching process of CO2 O2 in-situ leaching for seven leaching units at Mengqiguer deposit was analyzed. The results show that 450~600 mg/L of CO2 can not only control pH value at reasonable level to prevent calcium carbonate precipitation, but also produce enough HCO3- for uranium leaching. With obvious effect on oxidizing of ore deposit, oxygen with content of 200~300 mg/L controls SO42- at a lower content to avoid calcium sulfate precipitation. The resolved uranium is in positive correlation with mineralization conditions and ratio of injection rate to production rate in each leaching unit. CO2 O2 leaching technology is suitable for uranium in-situ leaching of the deposit under study. |
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