镝铁阴极电蚀对稀土电解槽电解特性的影响

Effect of dysprosium-iron cathode electroerosion on electrolysis characteristics of rare earth electrolytic cells

随着稀土熔盐电解槽电解过程的进行,阴极形状会随着时间的推移发生电腐蚀,电解槽底部阴极锥角α不断增大,对电解效率与热场产生了一定影响.以越南镝铁阴极稀土电解槽为研究对象,利用COMSOL多物理场耦合软件,计算了稀土电解槽中阴极不同电解阶段不同阴极形状的电解特性参数,得到了电解槽中不同阴极锥角α值与最大电流密度关系曲线图,并分析了电解槽内阴极电蚀对整个电解反应过程的影响,为电解槽的后期维护提供了参考依据.

With the electrolysis process of the rare earth molten salt in the electric tank,the cathode shape will undergo electrical corrosion as time goes on,whose cone angle increases continuously at the bottom of the rare earth electric tank,and it has a certain effect on the electrolysis efficiency and the thermal field.With the aid of COMSOL multi physical field coupling software,this paper,using the rare earth cell with dysprosium iron cathode in Vietnam as the research object,simulates the electrolysis characteristics of different cathodes in different electrolysis stages and obtains the curves of the relation between the alpha value of different cathode cones and the maximum current density in the rare earth electrolysis cell.The cathodic electro etching influence of the on the whole process of the electrolytic reaction in the cell is analyzed,providing a reference for the later maintenance of the cell.