Abstract:Operation superheat of electrolyte, amount of carbon dust and carbon content in electrolyte during period of different quality carbon anodes usage in an aluminum smelter enterprise were tracked for a long time. Electrolyte composition adjustment test was carried out to track and analyze carbon dust amount and operation superheat variations with change of KF and LiF contents. The results show that high quality anodes can significantly reduce amount of carbon dust and carbon content in electrolyte. Low operation superheat and high amount of carbon dust may be the characteristic of aluminum electrolysis process with high KF and low LiF content electrolyte system. Reducing KF content in electrolyte and appropriately raising LiF content can improve operation superheat and reduce amount of carbon dust significantly. Anode quality, LiF and KF contents in electrolyte, operation superheat of bathe, and carbon content in anode covering materials are important factors affecting carbon dust production in electrolysis process.