500kA铝电解槽纯电解质体系添加高锂盐电解质混合焙烧启动的工业试验探讨

Discussion on Industrial Test of Mixed Roasting Start-Up of Pure Electrolyte System of 500 kA Aluminum Reduction Cell with High Lithium Salt Electrolyte

为消弱冲击电压过高和电解质温度过高对阴极炭块内衬的破坏,很多电解铝企业常常通过提高电解质中锂盐来提高电流效率和降低电耗的目的。文章介绍500 k A大型预焙电解槽纯电解质体系添加高锂盐电解质进行焙烧启动的工业试验结果,并对富含高锂盐的电解质体系在生产过程中带来的优劣进行分析,总结出高锂盐电解质体系对延长电解槽寿命和提高电流效率的应用效果。

In order to weaken the damage of cathode carbon block lining caused by too high impulse voltage and too high electrolyte temperature,many electrolytic aluminum enterprises often improve current efficiency and reduce power consumption by increasing lithium salt in electrolyte.This paper introduces the industrial test results of roasting start-up of pure electrolyte system of 500 kA large prebaked electrolytic cell by adding high lithium salt electrolyte,analyzes the advantages and disadvantages of electrolyte system rich in high lithium salt in the production process,and summarizes the application effect of high lithium salt electrolyte system on prolonging the service life of electrolytic cell and improving current efficiency.