反三明治结构复合多孔Pb合金阳极数值仿真

来源期刊:中南大学学报(自然科学版)2020年第12期

论文作者:蒋良兴 黎红兵 杨健 张红亮

文章页码:3357 - 3367

关键词:锌电积;多孔铅合金阳极;表面电流密度;表面电势;数值仿真

Key words:zinc electro-winning; porous Pb-alloy anode; surface current density; surface potential; numerical simulation

摘    要:为了方便快捷地获得在锌电积过程中阳极电流密度和电压分布情况,基于ANSYS有限元分析软件,构建Pb合金阳极的电化学数值计算模型,并通过长时间锌电积模拟实验进行验证。在此基础上,分别研究普通多孔阳极、反三明治结构复合多孔Pb合金阳极在电化学反应过程中的导电性、电流与电压的分布规律。研究结果表明:在锌电积过程中,多孔阳极和反三明治结构复合多孔阳极的模拟槽电压与实测槽电压之间的相对误差分别为0.4%和0.1%,这表明所建立的电化学数值计算模型能准确反映电积过程中的电场特性。反三明治结构复合多孔阳极的表面电流密度分布和表面电势分布的极差分别为2 142 A/m2和15 mV,低于多孔阳极的电流密度分布和电势分布的极差。电极表面的电流密度和电势分布情况证实了反三明治结构复合多孔Pb合金阳极可提升阳极的导电性和表面电势的分布均匀性,从而可降低槽电压。

Abstract: In order to obtain the distribution of anodic current density and voltage during the zinc electrowinning process conveniently, a electrochemical numerical calculation model of Pb-alloy anode was constructed by the ANSYS finite element analysis software, and the feasibility of the numerical model was verified through long time simulated experiment. On this basis, the distribution characteristics of conductivity, current density and voltage of the anti-sandwich structure composite porous anode were numerically studied. The results show that compared with the experimental cell voltage in the simulated zinc electrowinning experiments, the calculated value is only 0.4% and 0.1% deviation for porous anode and composite porous anode respectively, indicating that the constructed electrochemical numerical calculation model can reflect the electric field accurately during the electrowinning process. The range value of the distribution of surface current density and potential for the composite porous anode are 2 142 A/m2 and 15 mV respectively, which are lower than those of the porous anode. Further, the numerical simulation results verify that the anti-sandwich structure can improve the conductivity of porous anode and homogeneity level of the potential distribution, leading to a lower cell voltage.

有色金属在线官网  |   会议  |   在线投稿  |   购买纸书  |   科技图书馆

中南大学出版社 技术支持 版权声明   电话:0731-88830515 88830516   传真:0731-88710482   Email:administrator@cnnmol.com

互联网出版许可证:(署)网出证(京)字第342号   京ICP备17050991号-6      京公网安备11010802042557号