400 kA铝电解槽炉帮再生技术的应用  

Application of Furnace Side Regeneration Technology of 400 kA Aluminum Reduction Cell

作　　者：李成元 李文超 张宁 李建卫 LI Chengyuan;LI Wenchao;ZHANG Ning;LI Jianwei

机构地区：[1]山东南山铝业股份有限公司,山东龙口265700

出　　处：《绿色矿冶》2023年第3期31-35,共5页Sustainable Mining and Metallurgy

摘　　要：规整的炉帮是铝电解槽取得良好经济指标和较长槽寿命的关键因素。在生产过程中,炉帮随着槽龄增长或因管理不善出现侵蚀、破损,进而影响铝电解槽的电流效率和电解槽的安全生产。本文从电解质体系、炉帮破损机理以及炉帮建立条件等几个方面分析了电解槽炉帮再生的可行性,并以槽况不稳定、侧部部分位置炉帮较薄或没有炉帮的电解槽为试验槽,提出了实际操作方案,比对了炉帮再生前后炉帮厚度、电压、电流效率及全槽散热孔温度的变化情况。炉帮再生后,A、B面炉帮平均厚度分别由之前的3 cm和7 cm增加至9 cm和13 cm,且之前没有炉帮的位置也形成了比较理想的炉帮,散热孔温度整体降低,电解槽运行逐步平稳,槽运行电压明显降低,电流效率也随之提高。Regular furnace side is the key factor for aluminum reduction cells to achieve good economic indicators and long cell life.In the production process,the furnace side is eroded and damaged with the increase of cell age or due to poor management,which further affects the current efficiency of aluminum reduction cells and the safe production of aluminum reduction cells.In this paper,the feasibility of the regeneration of the electrolytic cell furnace side was analyzed from the aspects of the electrolyte system,the damage mechanism of the furnace side and the conditions for the establishment of the furnace side.Taking the electrolytic cell with unstable cell condition,thin furnace side or no furnace side as the test cell,the practical operation scheme was put forward,and the changes of the furnace side thickness,voltage,current efficiency and the temperature of the cooling hole in the whole cell before and after the furnace side regeneration were compared.After the regeneration of the furnace side,the average thickness of the furnace side A and B increased from the previous 3 cm and 7 cm to 9 cm and 13 cm,respectively,and an ideal furnace side was formed in the position where there was no furnace side before.The temperature of the cooling hole decreased,the operation of the electrolytic cell was gradually stable,the running voltage of the cell was obviously reduced,and the current efficiency was also improved.

关 键 词：铝电解槽 炉帮 再生 电解质体系 分子比 

分 类 号：TF821[冶金工程—有色金属冶金]