新型高导电阴极钢棒结构对电解槽电-热场影响仿真

Effects of high conductivity collector bars on thermo-electric field in aluminum reduction cell

本文采用有限元仿真计算的方法计算采用新型高导电阴极钢棒铝电解槽的电热场。在ANSYS平台上建立了350k A铝电解槽的双阳极切片模型,从物理场的角度考察新型高导电阴极钢棒结构对于电解槽电平衡和热平衡的影响。结果表明:运用高导电钢棒的电解槽阴极压降可以降低约124m V左右;单纯采用高导电钢棒而不对槽底保温进行加强时,底部保温略显不足,在现行的工艺下,槽帮稍厚,伸腿偏长;采用高导电钢棒并对电解槽底部进行保温加强、提高覆盖料厚度等措施,可以使得该槽在降低阴极压降后仍保持在合适的热平衡之下。

In this article, the finite element method （ FEM ） was used to calculate the thermo - electric field in aluminum reduction cells which adopted high conductivity collector bars. An slice FEM model based on ANSYS was developed to investigate the effects of high conductivity collector bars on volt- age balance and heat balance of the reduction cells. The results show that the cathode voltage drop can be reduced by 124mV when high conductivity col- lector bars are applied. Without insulation strengthen at the bottom, the cell using high conductivity collector bars seems to have a bit thicker ledge, and a little longer ledge. With adopting some insulation strengthen measures, the cell can maintain appropriate heat balance.