半系列500kA铝电解端头槽启动生产实践

Startup of semi-series 500kA aluminum electrolytic end-cell

受国家产业政策影响,某铝材企业500 kA电解系列生产线仅能投产半系列。由于临时回路母线距离半系列端头槽较近,受磁场影响严重,无法正常启动。该公司大胆改进与创新,通过采取合理的焦粒石墨碎配比、延长焙烧时间、启动物料选择电解质粉等工艺改进和安装软连接器、合理拆除分流器、增加母线转接、大铝量连续灌铝等操作技术,成功启动了倒数第二的2个端头电解槽,年创经济效益达1406万元。由于端头电解槽启动难度大,特殊技术措施多,需要精细化的管理,本文详细阐述该公司半系列500 kA端头槽启动情况,以期为同类企业提供参考。

Affected by the national industrial policies,only half of the 500 kA electrolytic cell series of the production line of a certain aluminum plant is allowed to be put into operation.Due to that the busbar of the temporary circuit is close to the end-cell of the semi-series,and the affect of magnetic field is severe,the electrolysis series cannot be started up normally.This company made bold innovation,by means of reasonable ratio of coke to crushed graphite,prolonged roasting time,using electrolyte powder as startup material and other process improvement,and by installing soft connector,reasonably removing shunt,increasing busbar transfer,large flux continuous aluminum filling and other operation technologies,the two next to the last electrolytic cells are started up successfully,achieving annual economic benefit of 14.06 million CNY.As the startup of the electrolytic end-cell is difficult with quite a lot of special measures,refined management is needed.In this paper,the startup of the 500 kA end-cell of the semi-series of the company is elaborated for the purpose of providing a reference to the similar plants.