Low temperature Aluminum Electrolysis in Na₃AlF₆-AlF₃-CaF₂-LiF-Al₂O₃ Bath System

Based on the main physico-chemical properties of Na₃AlF₆-AlF₃-CaF₂-LiF-Al₂O₃ system studied, including liquidus temperature、electrical conductivity and bath density, a laboratory scale vertical discharging aluminum type electrolysis cell of about 100A capacity was run with TiB₂ cathodes and low molar ratio(1.5~2.0) electrolytes at 800~930℃ range. Aluminum metal was obtained with 84.6%~88.3% current efficiencies and 11.54~11.83 kW·h/kg specific energy consumption.