铝电解槽阳极气泡行为研究

The behavior of anode bubbles in aluminum electrolytic cell

利用透明槽研究铝电解槽阳极气体行为.研究表明:阳极气体的生成是一个连续的过程,阳极侧部生成的气泡比阳极底部生成的气泡小.正对阴极的阳极表面生产的气泡比其它阳极部位上生成的气泡小,这是一个明显的现象.而且,正对阴极的阳极表面生成的气泡不会汇集成大气泡,这和其它阳极部位生成的气泡有很大的差异.阳极底部生成的气泡全部从阴阳极中间的电解质移动溢出电解质.阳极气泡的大小影响槽电压,气泡直径增大3 mm,槽电压增加0.21 V.同时,电流密度为0.5 A/cm2底部阳极气体离开阳极时槽电压的变化为0.16 V.电流密度为0.3 A/cm2,底部阳极气体离开阳极时槽电压的变化为0.12 V.

This paper studies the behavior of anode bubbles by transparency cell. Anode bubbles grew gradually at anode bottom. The bubbles generated on anode side were smaller than those of anode bottom. Obvious phenomena that diameter of anode bubbles opposite to the cathode was the smallest in all bubbles were observed. The bubbles generated on the anode surface don＇t collect into bigger bubbles, which is different from the bubbles generated in other parts of anode. The bubbles generated at anode bottom overflow electrolyte by moving between anode and cathode. The diameter of anode bubbles affects cell voltages. Cell voltage increases by 0.21V with diameter of anode bubbles increasing 3 mm. The cell voltage changes by 0.16 V when anode bubbles generated at anode bottom separated from anode at 0.5 A,/cm2. The value was 0.12 V at 0.3 A/cm2.