JRMGE / Vol 16 / Issue 2
Wetting front migration model of ion-adsorption rare earth during the multi-hole unsaturated liquid injection
Yu Wang, Xiaojun Wang, Yuchen Qiu, Hao Wang, Gang Li, Kaijian Hu, Wen Zhong, Zhongqun Guo, Bing Li, Chunlei Zhang, Guangxiang Ye
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a Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China
b School of Resources and Environment Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China
c School of Civil Engineering and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China
d Ganzhou Nonferrous Metallurgy Research Institute, Ganzhou, 341000, China
2024, 16(2): 483-496. doi:10.1016/j.jrmge.2023.06.020
Received: 2022-12-01 / Revised: 2023-04-09 / Accepted: 2023-06-15 / Available online: 2023-09-28
2024, 16(2): 483-496.
doi:10.1016/j.jrmge.2023.06.020
Received: 2022-12-01
Revised: 2023-04-09
Accepted: 2023-06-15
Available online: 2023-09-28
In the process of ion-adsorption rare earth ore leaching, the migration characteristics of the wetting front in multi-hole injection holes and the influence of wetting front intersection effect on the migration distance of wetting fronts are still unclear. Besides, wetting front migration distance and leaching time are usually required to optimize the leaching process. In this study, wetting front migration tests of ion-adsorption rare earth ores during the multi-hole fluid injection (the spacing between injection holes was 10 cm, 12 cm and 14 cm) and single-hole fluid injection were completed under the constant water head height. At the pre-intersection stage, the wetting front migration laws of ion-adsorption rare earth ores during the multi-hole fluid injection and single-hole fluid injection were identical. At the post-intersection stage, the intersection accelerated the wetting front migration. By using the Darcy's law, the intersection effect of wetting fronts during the multi-hole liquid injection was transformed into the water head height directly above the intersection. Finally, based on the Green-Ampt model, a wetting front migration model of ion-adsorption rare earth ores during the multi-hole unsaturated liquid injection was established. Error analysis results showed that the proposed model can accurately simulate the infiltration process under experimental conditions. The research results enrich the infiltration law and theory of ion-adsorption rare earth ores during the multi-hole liquid injection, and this study provides a scientific basis for optimizing the liquid injection well pattern parameters of ion-adsorption rare earth in situ leaching in the future.
Keywords: Ion-adsorption rare earth ore, Multi-hole unsaturated liquid injection, In situ leaching, Intersection effect, Calculation model
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Yu Wang, Xiaojun Wang, Yuchen Qiu, Hao Wang, Gang Li, Kaijian Hu, Wen Zhong, Zhongqun Guo, Bing Li, Chunlei Zhang, Guangxiang Ye, 2024. Wetting front migration model of ion-adsorption rare earth during the multi-hole unsaturated liquid injection. J. Rock Mech. Geotech. Eng. 16 (2), 483-496.
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Author(s) Information
Xiaojun Wang
Xiaojun Wang obtained his Master's degree in Mining Engineering from Jiangxi University of Science and Technology, China, in 2006 and his PhD in Engineering Mechanics from Beijing University of Science and Technology, China, in 2012. He was the associate professor in the Department of Mining Engineering at Jiangxi University of Science and Technology, China from 2013 to 2017, and was promoted to professor at the Key Laboratory of Mining Engineering in Jiangxi Province since 2017. His research interests include (1) efficient seepage and disaster prevention of ion-adsorption rare earth; (2) green and efficient mining of metal mines; and (3) analysis of rock mass stability in mines.