在Na3AlF6-AlF3-CaF2-LiF-Al2O3體系中低溫鋁電解

在Na₃AlF₆-AlF₃-CaF₂-LiF-Al₂O₃體系中低溫鋁電解

摘要: 研究了Na₃AlF₆-AlF₃-CaF₂-LiF-Al₂O₃熔鹽體系的物化性質,包括液相線溫度、電導率和密度,并選擇該體系中的低分子比電解質在100A垂直排鋁式電解槽上進行了電解制鋁.結果表明,用TiB₂材料做陰極,當所使用的電解質分子數比為1.5~2.0,電解溫度為800~930℃時,電流效率達到84.6%~88.3%,每kgAl的直流電耗為11.5~11.83kw·h.

Abstract: 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.