大电流稀土电解槽阳极结构研究

针对大电流稀土电解槽阳极消耗速率快、阳极消耗变形导致电热场分布不合理的现象,对15 kA大电流稀土电解槽阳极的实际消耗问题进行了分析,并运用COMSOL多物理场耦合软件对阳极消耗过程和不同阳极倾角下的三维电热场进行了耦合模拟分析。结果表明:阳极消耗变形后,电解槽内上部电场分布比下部更加密集,高温区域向液面偏移;随着阳极斜向上倾角的增大,电解槽内电压降低,高温区域向槽底偏移,倾角为4°时电热场分布最为合理。最后结合现场试验,验证了试验结果和模拟结果的一致性。

Anode Structure of High Current Rare Earth Electrolysis Cell

Aiming at the phenomenon that anode consumption rate of the high-current rare earth electrolysis cell was fast,and the anode consumption deformation caused the electrothermal field to be unreasonable,the anode actual consumption problem of the 15 kA high-current rare earth electrolysis cell was analyzed.COMSOL multi-physical simulate software was used to simulate the three-dimensional electrothermal field at the process of anode consumption and different anode inclination angles.The results showed that electric field distribution in the upper part of electrolysis cell is denser than that in the lower part after anode consumption deformation,and the high temperature area shifts to the liquid level.With the increase of oblique upward inclination of anode,the voltage in the electrolysis cell decreases,and the high temperature area shifts to bottom of the electrolysis cell.The distribution of electrothermal field is most reasonable when the oblique upward inclination angle of anode is 4°.Finally,the consistency of the test results and simulation results is verified by field tests.