氧化铝在冰晶石熔体中溶解的动力学模型

Kinetic Model of Dissolution of Alumina in Molten Cryolite

通过对Ａｌ２Ｏ３晶体在Ｎａ３ＡｌＦ６熔液中溶解时分解的物质的量及溶解产物结构的描述，建立了Ａｌ２Ｏ３在Ｎａ３ＡｌＦ６熔液中溶解的中间态活化络离子动力学模型·研究认为：在Ａｌ２Ｏ３溶解过程中将首先生成中间态活化络离子；Ａｌ２Ｏ３溶解反应的级数和溶解产物的构型与熔体中的Ｏ２－离子的溶剂化络合剂的浓度有关·

A conception and kinetic model of intermediate active complex was set up to study dissolution of Al 2O 3 in molten cryolite,by describing the resolution molar number and the product structure of Al 2O 3 dissolution reaction.The kinetic integral formulation of Al 2O 3 dissolution was studied and the inflexion purport of Al 2O 3 dissolution curve was also discussed. The model gives good explanations for the phenomena such as change of reaction orders, the structure transformation of aluminium fluorin oxygen complexes, change of dissolution reaction velocity and active energy by means of changing solubility of Al 2O 3 in dissolution reaction.