80kA小型预焙槽早期破损原因初探

Study on Early Damage of 80kA Small Size Prebaked Anode Pot

针对80kA小型预焙槽早期破损多、槽寿命短的问题,采用干刨试验槽的方法,通过对破损槽的槽壳、槽内衬侧部碳块、伸腿、底部碳块、耐火层等部位消耗破损状况的分析,认为造成电解槽早期破损的主要原因是摇篮架抗剪切强度差、铝液焙烧工艺存在缺陷以及电解行程的波动。采取增加补强筋板加强摇篮架抗剪切强度,采用焦粒焙烧启动工艺,优化平稳生产行程等措施,解决了电解槽早期破损问题,延长了电解槽寿命。

Pointing to the problem of too much early damages and short service life occurred to 80KA small size prebaked anode pots dry digging test method was adopted to analyze the condition of pot shell, sidelining carbon blocks, artificial shelf in the pot, bottom carbon blocks, refractory layer of the damaged pots. The main reasons were found to low shearing-strength of the cradle frame, defaults existed in the molten aluminum roasting process, and the fluctuation of the production process. The measures were taken as adding steel ribbon plate to increase the shearing-strength of cradle frame, test and enlarged application of coke granule roasting start-up process, optimizing and smoothing of the production process, etc. As the result, the problem of early damages of 80KA prebaked anode pot was preferably solved and service life of pots were extended