320 Ka Aluminum Electrolytic Cell Electric - Magnetic Coupling Simulation Of Flow Field And Performance Evaluation Method

Coupled action of electric-magnetic-flow field in the aluminum reduction cells has a significant influence on the stability, current efficiency, power consumption and the cell life. So it is of important practical significance for the cell’s structure optimization design and development for new style cell with studying coupled relation about multiple physical fields in the aluminum reduction cells, calculating the electric-magnetic-flow field, according to the relationship between the physical field and stability, current efficiency and power consumption, putting forward measure of aluminum reduction cell reduction cell’s integrated performance evaluation standard.Considering the320kA prebaked aluminum reduction cell as the object of study, the paper in-depth analysis aluminum electrolysis principle and the aluminum reduction cell structure, and studies the physical field characteristics and the coupled relations between the physical fields, which provides theory basis for establishing electro-magnetic-field coupling simulation platform of the aluminum reduction cell cell and presenting a comprehensive performance evaluation index. The main work of this papers include:(1)In ANSYS software environment, the entity model and the finite element model of the320kA prebaked aluminum reduction cell is established for simulation about electric-magnetic-flow multiple physical fields. The electromagnetic field calculation in the aluminum reduction cell is finished based on the finite element method. The distribution laws of the electromagnetic field are obtained.(2)According to the flow field simulation content aluminum reduction cell model is simplified. Two turbulence models are established with the FLUENT software and the finite volume method, one with a bus and the other without. Finally, these models are computed in high-performance computing platform, the simulation results of velocity, interface waves and the electromagnetic force in the flow field are well obtained. These results are analysed in the flow field, which also demonstrate the validity of the turbulence modeling and the effectiveness of our modeling schemes.(3)By researching some related factors inFLUENTing the aluminum reduction cells stability and energy consumption. A comprehensive evaluation index based on information entropy of the electromagnetic force for measuring the aluminum reduction cells stability and energy consumption is put forward and applied on the study about the electromagnetic field of the320kA aluminum reduction cells in different polar distances. The result shows that the index can effectively and comprehensively evaluates cells stability and energy consumption. Its assessment result reveals the influence rules between the polar distances and aluminum reduction cell’s stability, the current efficiency and slot voltage, and a polar distances configuration which keeps320kA aluminum cell efficiently operation are found.