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| Relationship between Solute Transportation and Leaching Solution Flow during Early Period of Acid In-Situ Leaching at One Sandstone-Type Uranium Deposit |
| Received:February 14, 2017 Revised:March 06, 2017 |
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| DOI：doi：10.3969/j.issn.1007-7545.2017.06.007 |
| KeyWord:sandstone-type uranium deposit; acid in-situ leaching; leaching solution flow; solute transportation; numerical simulation |
| Author | Institution |
| HUANG Qunying |
新疆中核天山铀业有限公司 |
| ZHOU Yipeng |
东华理工大学 |
| LIU Ke |
新疆中核天山铀业有限公司 |
| CHEN Meifang |
新疆中核天山铀业有限公司 |
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| Abstract: |
| Relationship between solution flow and transportation of solute ions, such as SO42-, H , Ca2 , and Mg2 , which are closely related with water-rock interaction of in-situ uranium leaching, were analyzed by hydrogeochemistry analysis and numerical simulation. Transportation characteristics of SO42- reveal that it takes 8 days for the earliest leaching solution to reach extraction well, and 40 days to form a stable flow field. Simulation results show it takes 5~6 days for the earliest solution flowing toward extraction well to reach production well and 40 days for the rest 83%. Retarded by water-rock interaction, the forefront of H plume reaches extraction well 13 days later than that of SO42-; as water-rock interaction products, Ca2 and Mg2 transport synchronously with SO42-; and it takes 66 days to built a balance between supply and consumption of H , forming stable geochemical field for uranium leaching. According to simulation results, 94% of solution flowing toward extraction well reaches production well on the 66th day. The results of solution flow simulation are consistent with those of hydrogeochemistry analysis. |
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