The Design And Optimization Research On 6kA Bottom Liquid Cathode Structure Electrolytic Cell Of Neodymium

The traditional rare earth electrolytic cell with cathode on the top which has a large loss of molten salt volatilization,upper space is tight,a serious oxidation of the graphite anode and the graphite electrolytic cell,a serious loss of the rare earth metal,a serious secondary oxidation,and a low current efficiency.At the same time,under the urgent development of large-scale,automation and energy-saving rare earth electrolytic technology,the development of higher performance bottom liquid cathode rare earth electrolytic cell has become a focus of common concern in academia and rare earth industries.To this end,this study draws on the structural characteristics of mature industrial aluminum and magnesium electrolytic cells,based on the research of rare earth electrolytic site and the preliminary research of the research group,The design target of the 6kA bottom liquid cathode structure neodymium electrolytic cell was established,the electric field,thermal field,temperature field and flow field of the electrolytic cell were calculated by commercial software ANSYS,Finally designed and optimized a new groove structure.The main results achieved in the study include:(1)By comparing and analyzing the flow field in a 10 kA square and circular rare earth electrolytic cell applied by the rare earth metal company,it is concluded that the circular groove structure has advantages,thus determining the circular shape of the 6kA bottom liquid cathode structure neodymium electrolytic cell.(2)The design process of the electrolytic cell assisted by ANSYS includes: 1)determination of electrolytic cell body structure and traversal setting of electrolytic cell,2)ANSYS assisted calculation of potential and current distribution in electrolytic cell,3)initially determine the size of electrolytic cell according to the heat balance screening,4)optimizing the size of electrolytic cell by temperature field simulation calculation with ANSYS,5)the size of electrolytic cell is determined again by flow field simulation with ANSYS.The proposed 6kA bottom liquid cathode electrolytic cell structure,according to the results of thermal equilibrium calculation,the three types of electrolytic cell with balance of heat budget are: the electrolytic cell of polar distance is 9 cm and cathode radius is 47 cm,the electrolytic cell of polar distance is 11 cm and cathode radius is 48 cm and the electrolytic cell of polar distance is 13 cm and cathode radius is 49 cm.(3)The simulation results of temperature field show that the electrolytic cell with reasonable temperature field distribution are: the electrolytic cell of polar distance is 11 cm and cathode radius is 48 cm and the electrolytic cell of polar distance is 13 cm and cathode radius is 49 cm.Through the CFD module,the simulation of the flow field of the two types of electrolytic cell with reasonable temperature field distribution shows that the optimal cell design size is: the electrolytic cell of polar distance is 11 cm and cathode radius is 48 cm.Combined with engineering construction requirements,Finally determine the structure diagram of the 6kA bottom liquid cathode structure neodymium electrolytic cell.