Transactions of Nonferrous Metals Society of China
JOURNAL OF RAILWAY SCIENCE AND ENGINEERING
|Vol. 12 No. 6 December 2002|
（1. School of Materials and Metallurgy,
Northeastern University, Shenyang 110004, China;
2. Zhengzhou Light Metals Research Institute, Zhengzhou 450041, China）
Abstract:By partial and general dissection of large prebaked alumina electrolysis cells, the macro appearance, chemical composition and phase variations were studied employing actual observations and measurements on the cells together with X-ray diffraction phase analysis and scanning electron microscopy of samples from different locations. According to the practical production, a chemical reaction model of aluminum reduction cell failure was set up in order to reduce the incidence of cell failure and extend pot service life.
Key words: cathode failure, chemical reaction model, large prebaked cell, pot service life