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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 2    June 1999

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LOW TEMPERATURE ALUMINUM ELECTROLYSIS IN NaF-AlF3-BaF2-CaF2 BATH SYSTEM
Lu Huimin1, Qiu Zhuxian and Fang Keming2

1.Department ofPhysicochemistry, University of Science and Technology Beijing,Beijing100083, P. R. China;
2.Department ofNonferrous Metals Metallurgy, Northeastern University,Shenyang110006, P. R. China

Abstract:Multiple regression equations on liquidus temperature, electrical conductivity and bath density of NaF-AlF3-BaF2-CaF2 system were obtained from experiments designed using orthogonal regression method. In 100A experimental cell with low melting point electrolyte at 750℃, current efficiency(CE) was 90.57% and specific energy consumption was 12.27kWh per kg Al. Because of the fact that aluminum metal obtained float on the surface of molten electrolyte, this electrolysis method was named as low temperature aluminum floating electrolysis. The results showed that the new low temperature aluminum electrolysis process in NaF-AlF3-BaF2-CaF2 bath system was practical and promising.

 

Key words: low temperature aluminum electrolysis NaF-AlF3-BaF2-CaF2 bath system aluminum floating

ISSN 1672-7029
CN 43-1423/U

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