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| Saturation State of Calcium Carbonate during Mild Acid In-situ Leaching of Uranium at Mengqiguer Deposit |
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Received:June 25, 2014
Revised:July 09, 2014
Accepted:July 09, 2014
Published Online:November 19, 2014
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| DOI：10.3969/j.issn.1007-7545.2014.12.007 |
| KeyWord:sandstone-type uranium ore; in-situ leaching; mild acid leaching; calcium carbonate; saturation index (SI) |
| Author | Institution |
| ZHANG Yong |
新疆中核天山铀业有限公司 |
| ZHOU Yi-peng |
东华理工大学 |
| ZHANG Qinglin |
新疆中核天山铀业有限公司 |
| JI Hongbin |
新疆中核天山铀业有限公司 |
| FEI Ziqiong |
新疆中核天山铀业有限公司 |
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| Abstract: |
| Calcium carbonate dissolution-precipitation related factors were analyzed to control the blocking caused by calcium carbonate precipitation during mild acid in-situ leaching of uranium at Mengqiguer deposit. Saturation state of calcium carbonate was monitored with geochemical modeling software QHREEQCI. The results show that pH is the primary controlling factor for calcium carbonate dissolution-precipitation. Saturation state of calcium carbonate moves gradually from being saturated to being unsaturated with drop of pH value. Precipitation of calcium carbonate can be effectively prevented by controlling pH value below critical value. |
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