工艺条件对电解槽融体中电流分布影响的数值计算

对电解槽工作在不同工艺条件下的电流场进行数值计算。结果表明 ,随层面的降低 ,水平电流密度的幅值和梯度变化不大。而当伸腿伸至阳极底部时 ,在槽边部会出现较大的负方向电流 ,伸腿越长 ,负向电流越大。在达到阴极表面之前 ,铝液层面中垂直电流密度分布基本与铝液层面无关。阳极底部铝液中x 向电流可以忽略 ,且随铝水平变化较小 ,但 y 向电流密度随铝水平降低而升高。铝液中z 向电流密度与铝水平关系不大。

Current Distribution Numerical Calculation of Al Reduction Cell under Processing Condition

The current distribution in the metal pad is calculated by numerical method. It is found that both the current density value and its gradient are not increased evidently with the lowering of metal layer. When ledge ex- tends to below anode, there is big opposite current in the metal outside the anode, and the longer the ledge extends, the bigger the opposite current density. Influence of metal height on vertical current density can be ignored until it reaches to cathode surface. Current density in x direction of metal pad below the anode is negligible, and not varied with the metal level changes. While current density in y direction increases with the metal height lowering, however, it doesn't change in z direction.