基于电热场耦合条件下稀土电解槽电极结构优化模拟

以3kA钕电解槽为研究模型,考虑到电热场在电解过程中的相互影响,运用COMSOL有限元模拟软件建立了的电热耦合模型,并对不同配比的电极插入深度、极间距进行仿真模拟。结果表明,在一定槽电压下,电极插入深度与极间距之间存在配比关系,配比关系影响电流和温度分布。电热场耦合后,在4.2V槽电压下,电极插入深度为220 mm、极间距75 mm时的电流效率较高,电解过程更加稳定。

Study on Matching of Electrode Insertion Depth and Spacing of Electrode of Rare Earth Electrolytic Cell with Numerical Simulation of Thermal-Electric Field Coupling

Coupling mathematical model of thermo-electric field was established by COMSOL finite element simulation software applying 3 kA neodymium electrolysis cell as models with consideration of correlation between electric field and thermal field. Electrode insertion depth and spacing of electrodes with different matching were simulated. The results show that there is a matching relationship between electrode insertion depth and spacing of electrodes which affects current and temperature distribution at certain cell voltage. High current efficiency is obtained under the conditions including electrode insertion depth of 220 mm, spacing of electrodes of 75 mm, and cell voltage of 4.0 V after thermo-electric field coupling.