Convection-diffusion-reaction coupling dynamic model for uranium ore heap leaching

被引：0
|
作者：
Liu Y.-L. [1 ,2 ]
Fu H.-Y. [1 ]
Ye Y.-J. [1 ]
Hu N. [1 ]
Li G.-Y. [1 ]
Ding D.-X. [1 ]
机构：
[1] Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang
[2] China General Nuclear Power Group (CGN) Uranium Resources Co., Ltd., Beijing
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2022年 / 32卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Column leaching; Convection: diffusion; Coupling dynamic model; Reaction; Uranium ore heap leaching;
D O I：
10.11817/j.ysxb.1004.0609.2022-39718
中图分类号：
学科分类号：
摘要：
The leaching of uranium in the process of uranium ore heap leaching is the result of the coupling of convection, diffusion and chemical reaction of leaching solution in porous media. In this paper, the convection, dispersion and reaction coupling dynamic model for uranium heap leaching was firstly established by theoretical analysis and mathematical modeling, the dynamic model was then solved by finite element method, and the solution results were finally verified by uranium heap leaching test. The results show that the established convection-diffusion-reaction coupling kinetic model for uranium ore heap leaching can reflect the changes of the main characteristic variables in the column leaching, characterize the concentrations of leaching solution and metal uranium at different depths of the leach column, the leaching rate of each fraction of uranium ore particle size, and the distribution of shrinkage nucleation for each fraction of uranium ore particle size at different time, and it can accurately predict the leaching rate of uranium in the ore column. It is concluded that the convection-diffusion-reaction coupling kinetic model for uranium ore heap leaching can be used to predict the leaching rate of uranium and regulate the process parameters for heap leaching. © 2022, China Science Publishing & Media Ltd. All right reserved.
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页码：1142 / 1151
页数：9
相关论文
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