Design On Auxiliary Heat Type High Current Rare Earth Electrolytic Cell

Rare earth preparation in industry is mainly obtained by electrolyzing rare earth compounds in rare earth electrolyzers.Most traditional electrolyzers tend to be miniaturized,with problems such as low electrolysis efficiency,scattered distribution,and small output,which are not suitable for large-scale production by enterprises.In view of this situation,it is necessary to design a kind of electrolytic cell with relatively higher electrolysis efficiency,large output and suitable for large-scale production by enterprises.The 15 KA plate cathode rare earth electrolytic cell of an enterprise is taken as the prototype,and the electrolysis principle of the electrolytic cell is deeply researched,the electric field and thermal field distribution of the electrolytic cell are simulated and analyzed through simulation software,and the structure of the electrolytic cell is optimized,improve the electrolytic efficiency of the electrolytic cell The specific content is as follows:(1)According to the structure of the existing Wan'an rare earth electrolytic cell,combining some known parameters,and adding auxiliary heating devices outside and at the bottom of the electrolytic cell,a new type of auxiliary heating high-current rare earth electrolytic cell is designed to determine.The model of the electrolytic cell,the structure size of the cathode and the anode,Established the model of the model of each part electrolytic cell by Solidworks—the three-dimensional software,and the establishment of the entire model is completed.(2)A mathematical model of the three-dimensional electric and thermal fields of the electrolyzer was established,various physical parameters of the electrolyte were calculated,and use the finite element analysis method;in rare earth electrolytic cell in the presence of external heat auxiliary devices two cases respectively for the three dimensional electric field and thermal field simulation.The hypothesis that the auxiliary heating device is beneficial to the electrolysis reaction of the electrolytic cell and the improvement of the electrolysis efficiency was verified by the distribution of the electric field and the thermal field research.Simulate the electric field distribution of the electrolytic cell at different temperatures and positions of the external auxiliary heating device.The inside of the cell can be roughly divided into four parts: the cathode area,the anode area,the metal receiving area and the electrolysis reaction area.Through the study of different position and temperature of auxiliary heat in three dimensional electric field.The optimum position and temperature of the external auxiliary heating device are obtained.(3)Using the electrothermal coupling module of simulation software to simulate the distribution of the thermal field of the electrolytic cell,and concluded that the high temperature region of the electrolytic cell is located in the middle of the cell,and the temperature decreases slowly from inside to the outside;the thermal field of the electrolytic cell under different auxiliary heating positions.The simulation was performed to analyze the thermal field distribution in the tank,and the results showed that the distribution of heat field in the lower layer of the electrolytic cell is more efficient,which is consistent with the electric field analysis,and can ensure that the electrolyte at the shoulder of the crucible collector will not solidify;for different auxiliary heating temperatures Analyze the thermal field of the lower electrolytic cell,and The most suitable temperature of the auxiliary heat is determined by the electric field distribution;simulate the thermal field of the electrolytic cell under the bottom auxiliary heating device,and determine that the electrolytic tank can reduce the time when the bottom auxiliary heating device is added.The solidification of the rare earth at the bottom of the crucible increases the service life of the electrolytic cell;analyzes the influence of electrolysis voltage on the thermal field of the electrolytic cell,and determines the best electrolytic voltage;finally,simulates and analyzes the thermal field of the electrolytic cell at different time periods during the electrolysis process Changes in the thermal field.(4)Determined the heating method of the auxiliary heating device of the electrolytic,and design the auxiliary heating device in the corresponding best position.In order to enhance the auxiliary heat effect,design the structure of the insulation layer of the 15 KA rare earth electrolytic cell,and select the appropriate material for installation and production.