基于液相传质的锌电解过程多物理场仿真分析 - 中南大学学报.pdf

第 48 卷第 1 期 中南大学学报( 自然科学版) Vol.48 No.1 2017 年 1 月 Journal of Central South University (Science and Technology) Jan. 2017 DOI: 10.11817/j.issn.1672-7207.2017.01.017 基于液相传质的锌电解过程多物理场仿真分析 邓亦梁，谢永芳，李勇刚，阳春华 ( 中南大学 信息科学与工程学院，湖南 长沙，410083) 摘要：针对锌电解槽中流速场、离子浓度场、电场耦合严重及其与电解能耗关系复杂的问题，基于液相传质原理， 结合组分质量守恒、流体动力学及电极动力学方程建立锌电解槽多物理场仿真模型。利用仿真软件 Comsol Multiphysics 对锌电解槽多物理场模型进行数值求解，通过对比计算结果与锌电解实验结果验证模型的正确性。 研究结果表明：阴极板表面电解液的流动方向主要有斜向上和斜向下，且斜向下的流速随着阴极板与进液口的距 离增大而迅速减小；极板间锌离子的浓度呈现“上低下高”分布；阴极板表面电解液流速低的区域，锌离子浓度 低而氢离子浓度高，电流效率低而能耗高。 关键词：锌电解过程；液相传质；多场仿真 中图分类号：TF813 文献标志码：A 文章编号：1672−7207(2017)01−0119−08 Multiphysics simulation analysis for zinc electrowinning based on liquid-phase mass transfer DENG Yiliang, XIE Yongfang, LI Yonggang, YANG Chunhua (School of Information Science and Engineering, Central South University, Changsha 410083, China) Abstract: Considering the complicated relationship between energy consumption of zinc electrowinning and seriously coupled multiphysics such as velocity field, concentration field and electric field in zinc electrolytic cell, a multiphysical simulation model of zinc electrolytic cell was established based on liquid-phase mass transfer by combining species mass conservation, fluid dynamics and electrode kinetics equation. The model was calculated numerically using simulation software Comsol Multiphysics and verified by comparing calculated results with experimental results. The results show that the electrolyte mainly flows slantingly upwards and downwards on cathode surfaces. The flow rate of the inclined downward decreases rapi