China Nonferrous Metallurgy

Affected by the national industrial policies, only half of the 500kA 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 endcell of the semiseries, 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 endcell is difficult with quite a lot of special measures, refined management is needed. In this paper, the startup of the 500kA endcell of the semiseries of the company is elaborated for the purpose of providing a reference to the similar plants.