中南大学学报（自然科学版）2025，Vol.56Issue(6)：2157-2168,12.DOI:10.11817/j.issn.1672-7207.2025.06.002
基于外加电场的地浸采铀强化浸出与溶质运移的仿真建模研究
Simulation modeling of enhanced leaching and solute transport in in-situ uranium mining based on applied electric fields
摘要
Abstract
To address the issues of low uranyl ion molar concentration and low leaching efficiency in conventional in-situ uranium leaching,a field-enhanced leaching method based on externally applied electric fields was proposed.Firstly,a multi-physics coupled model incorporating flow,chemical reactions,mass transport,and electric fields was constructed through numerical simulation.Then,various intensities of external electric fields were assigned,and the model was solved under transient conditions.Finally,based on the transient solutions obtained,the enhancement mechanism of the electric field on the in-situ leaching process was analyzed from multiple perspectives,including reaction rate and mass transfer rate and the strengthening effects of different field intensities were quantitatively evaluated.The results indicate that the application of an external electric field optimizes the molar concentration distribution of solutes within the leaching solution in the ore body through electromigration,enhancing the leaching reaction rate.Additionally,the electric capillary effect increases the reactive specific surface area of the ore matrix.The molar concentration of uranium in the leaching solution is improved and the production cycle is shortened.In the early stage of in-situ leaching,a 200 V external electric field increases the growth rate of uranium molar concentration by 32.4％compared to the case without an applied field,and advances the onset of the economically productive phase by approximately 40 d.The uranium concentration in the steady-state production phase is increased by 13.1％.Over a simulated leaching period of 1 200 d,the total mass of leached uranium is improved by up to 15.9％when a 200 V electric field is applied.The external electric field provides a significant enhancement to the in-situ leaching process and possesses broad prospect for practical application.关键词
地浸采铀/电迁移/电毛细/有限元法/数值计算Key words
in-situ uranium leaching/electromigration/electrocapillarity/finite element method/numerical computation分类
能源科技引用本文复制引用
曹哲,苏学斌,闻振乾,胥国龙,蒋良兴..基于外加电场的地浸采铀强化浸出与溶质运移的仿真建模研究[J].中南大学学报（自然科学版）,2025,56(6):2157-2168,12.基金项目
中国铀业有限公司-东华理工大学核资源与环境国家重点实验室联合创新基金资助项目(2022NRE-LH-06) （2022NRE-LH-06）
湖南省杰出青年基金资助项目(2022JJ10074)(Project(2022NRE-LH-06)supported by the Joint Innovation Fund of the China National Uranium Co.Ltd.,and the State Key Laboratory of Nuclear Resources and Environment （2022JJ10074）
Project(2022JJ10074)supported by the Fund for Distinguished Young Scholars of Hunan Province) （2022JJ10074）
