电沉积制备氢氧化镁多物理场的数值模拟  

Numerical Simulation of Multiple Physical Fields for the Preparation of Magnesium Hydroxide by Electrodeposition

作　　者：左晋松 狄跃忠 耿佃桥 ZUO Jin-song;DI Yue-zhong;GENG Dian-qiao(Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110819,China;School of Metallurgy,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110819 [2]东北大学冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2024年第5期652-659,689,共9页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(21878045)。

摘　　要：为了优化电沉积法制备片状氢氧化镁的工艺,采用多物理场耦合方法,对电沉积制备氢氧化镁的过程进行了二维非稳态数值模拟.得到了不同极板间距和极板放置深度下的槽电压、电流密度、电解质流场和气体分布情况,分析了极板参数对电解槽工作过程中电场与流场的影响.研究结果表明,减小极板放置深度会使槽电压降低,但较小的极板放置深度会导致槽内电解质流动性变差,不利于反应的进行.减小极板间距可以增大极板间电解液流速、加强传质、降低槽电压,但同时会导致极板上反应均匀性变差.为了保证电解质流速更快、槽电压更低、电流分布更均匀,应尽量加深极板放置深度,并适当调整极板间距.For the optimization of the process of preparing flaky magnesium hydroxide by electrodeposition,a multi‐physics coupling method was used to simulate the two‐dimensional unsteady state of magnesium hydroxide preparation by electrodeposition.The voltage,current density,electrolyte flow field,and gas distribution of the electrolyte are obtained under different plate spacing and plate placement depths.The effect of plate parameters on the electric and flow fields during electrolytic cell operation was analyzed.The research results show that the cell voltage decreases when the plate placement depth is reduced.However,reduced plate placement depth hinders electrolyte fluidity,which is detrimental to the reaction.Reducing the plate spacing can enhance mass transfer and reduce the working voltage,but it also worsens the uniformity of the chemical reaction distribution on the plates.To achieve faster electrolyte flow,lower cell voltage,and more uniform current distribution,the plate placement depth should be increased as much as possible,and the plate spacing should be adjusted appropriately.

关 键 词：电沉积 多物理场 氢氧化镁 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]