基于Comsol的稀土熔盐电解槽电场分析

采用Comsol Multiphysics 有限元软件，基于麦克斯韦原理，在电流不变的情况下，研究建立3 kA稀土钕熔盐电解槽电场数学模型，考察电极插入深度和极距对槽电压、电流密度等电场特征的影响。结果表明，模拟结果与实际生产数据吻合度高，所建立模型能较好地反映钕熔盐电解生产实际；随着电极插入深度的增大和极距的缩短，电解槽电压下降，利于降低电能消耗，但阴极电流密度比阳极电流密度下降快，不利于电流效率提高。应综合考虑能耗和效率，合理调整电极插入深度和极距，以降低钕熔盐电解单位能耗。

Analysis of electric field in rare earth molten salt electrolytic cell based on Comsol

By using Comsol Multiphysics software, a mathematical model of electric field in 3 kA neodymium molten salt electrolytic cell was built based on maxwell's theory, under the condition of constant current. Then, the effects of the electrode depth and electrode distance on the cell voltage and current density were studied. The results show that the simulation calculated values are in good agreement with the production data, showing that the model can wholly embody the neodymium molten salt electrolytic practice; with the increase of electrode depth and the decrease of electrode distance, the cell voltage and power consumption reduce, but the current density and production efficiency drop accordingly which is not good for improving current efficiency. Therefore, taking into account energy consumption and productivity, the electrode depth and electrode distance should be controlled to suitable values in order to reduce the unit energy consumption for neodymium molten salt electrolytic process.