铝电解槽在复杂电解质体系下的生产实践

Production practice of aluminum reduction cell in complex electrolyte system

铝电解生产中电解质(冰晶石+氧化铝熔体)具备有较好的熔解氧化铝能力,有良好地导电性和流动性。电解质中的微量元素成分不同,导致电解质性质发生极大变化。电解质中微量元素(主要是Li F、KF、Ca F2)含量对改善电解质的熔解温度、导电性、导热性、熔解度等产生直接的影响,但随着微量含量的增加,氧化铝溶解性能变差,炉底沉淀增多,槽内电场紊乱,进而炉膛畸形,电流效率降低,电耗上升,直接影响到电解生产工艺过程和各项经济指标。本文把锂、钾、钙含量较高的电解质体系称为复杂电解质体系,并就目前某公司在复杂电解质体系的生产实践进行了分析总结,提出了克服复杂电解质体系对电解生产存在的弊端,通过采取的一整套配套的应对措施,实现了电解生产平稳、高效运行,且节能潜力大。

the production of electrolytic aluminum electrolyte（cryolite alumina melt） have better melting alumina has good conductive ability,and liquidity. The content of trace elements in different electrolyte,electrolyte properties lead to great changes of trace elements in the electrolyte.（mainly LIF,KF,Ca F2） to improve the content of the melting temperature of electrolyte,electrical conductivity,thermal conductivity,impact melting degree,but with the increase of trace content,dissolution properties of alumina poor bottom precipitation increased,and the electric field disturbance groove deformity,current efficiency,power consumption rise,directly affect the electrolytic production process and the economic index of the lithium. Potassium,calcium content higher,electrolyte system called complex electrolyte system,and the current production practice in complex electrolyte system of a company are analyzed and summarized,put forward to overcome the complex The disadvantages of electrolytic system for electrolytic production are achieved. By adopting a set of supporting measures,the electrolytic production has been carried out smoothly and efficiently,and the energy saving potential is great.