Low temperature aluminum electrolysis in NaF-AlF3-BaF2-CaF2 bath system

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 100 A experimental cell with low melting point electrolyte at 750 degrees C, current efficiency(CE) was 90.57% and specific energy consumption was 12.27 kWh 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.