The project was initiated in 2002 and the construction was carried out from March 2003 to April 2004. In August 2004, the first half of the series, namely 78 electrolyzers, was started. It was successfully launched in November and successfully put into operation. In February 2005, 78 troughs were started, and all were successfully started in May. Now the entire series (156 troughs) is put into production and the operation is stable. At present, this project is a large scale (140kt/a) in the practical application of the 350kA electrolyzer technology. The average current efficiency of the 78 slots started in the first phase from March to May 2005 was 94.15%, and the DC consumption was 13474kWh/t.Al. Comprehensive technology has reached the international advanced level. In the development process, the project applied for 11 patents, of which 6 were authorized and 5 received. The main contents and innovations of this project are: asymmetrical six-terminal power supply for the busbar; optimized design of the magnetic field to make the operation of the electrolytic cell stable; new design of “system heat balance†using the simulation of heat balance of the electrolyzer body and plant ventilation simulation The method has achieved good cell heat balance and plant ventilation design effects; the use of narrow processing surface, tank shell plus fins, large spacing cradle structure, to obtain a small amount of material, compact structure, tank shell deformation is small, thermal stability The good results; The development of three-stage ventilation technology is conducive to improving gas gathering efficiency and improving the environment. The achievements in the construction of the Province of Investment, with good technical and economic indicators, have significant economic and social benefits. The results have been used in the 268kt/a new construction project of Lanzhou Aluminum Industry Co., Ltd., and this technology is used for bidding on multiple electrolytic aluminum projects in Saudi Arabia and Iran. Has a good promotion and use value.