|
| Flow Field Simulation and Hydrochemical Verification from CO2+O2 In-situ Leaching of Sandstone-type Uranium Deposit |
|
Received:November 20, 2018
Revised:November 20, 2018
Accepted:November 21, 2018
Published Online:December 21, 2018
|
| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2019.01.010 |
| KeyWord:sandstone-type uranium deposit; CO2+O2 neutral leaching; in-situ leaching flow field; numerical simulation; solute transport |
| Author | Institution |
| Zhou Yipeng |
核资源与环境国家重点实验室 |
| Li Guangrong |
核资源与环境国家重点实验室 |
| Xu Lingling |
核资源与环境国家重点实验室 |
| Sun Zhanxue |
核资源与环境国家重点实验室 |
| Zhou Zhongkui |
核资源与环境国家重点实验室 |
| Li Heng |
核资源与环境国家重点实验室 |
|
| Hits: 1846 |
| Download times: 2471 |
| Abstract: |
| Taking “six-injection and two-pumping” in-situ leaching units in a sandstone-type uranium deposit in Xinjiang as research object, applying combination of numerical simulation and hydrochemical analysis to form initial flow field of CO2+O2 neutral leaching and its relationship with solute transport was studied. The results show that in spindle-shaped flow field with axis of injection-pumping holes, solution front reaches the pregnant holes within 15 days; and concentration changes of SO42- and HCO3- are sensitive and accurate for infiltration of the forward solution of in-situ leaching. It is an ideal tracer for judging the forward flow of solution in initial stage of CO2+O2 neutral leaching. Initial calcium and magnesium carbonates are both in supersaturated state, and their migrations lag behind solution infiltration and is closely synchronized with change in pH value. There is good mutual proof between calculation results of leaching simulation, hydrogeochemical model and actual water chemical monitoring data. The comprehensive application of these methods is more objective and reliable in analysis of in-situ leaching flow field. |
| Close |