在Na3AlF6-AlF3-CaF2-LiF-Al2O3體系中低溫鋁電解
Low temperature Aluminum Electrolysis in Na3AlF6-AlF3-CaF2-LiF-Al2O3 Bath System
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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.
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