Aiming at the problems of low current efficiency and constant consumption of cathode in electrolysis process. Taking the 15kA electrolytic cell as the research object, the cathode diameter of the cell and different cathode insertion depths were simulated by using COMSOL Multiphysics multi physical field coupling software. Obtained the three dimensional electric field and current density distribution of different cathode diameters and different cathode insertion depths, and analyzed the simulation results. The results show that the best electrolytic cell cathode diameter is 65mm, and the best insertion depths of the cathode is about 500mm. According to the conclusion of the study, the optimum insertion depth and cathode diameter of the 15kA rare earth cell can be determined, which can provide reference for the structure optimization of the electrolytic cell.%针对电解过程中电流效率低和阴极不断被消耗等问题,以15 kA稀土电解槽为研究对象,采用COMSOL Multip-hysics多物理场耦合软件对电解槽的不同阴极直径和不同插入深度进行了数值模拟,得出了不同阴极直径和不同阴极插入深度下的三维电场图和电流密度分布曲线图,并对结果进行分析研究,分析得出了稀土电解槽的最佳阴极直径为65 mm,最佳的阴极插入深度为500mm.根据研究结论能够确定15kA稀土电解槽的最佳插入深度与阴极直径,为电解槽的的结构优化提供了参考依据.
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