The Applicability of Debye-Hückel Model in NaAl(OH)_4-NaOH-H_2O System  

作　　者：李小斌 吕卫君 冯港涛 刘桂华 彭志宏 周秋生 孟芸 

机构地区：[1]School of Metallurgical Science and Engineering, Central South University, Changsha, Hunan 410083, China

出　　处：《过程工程学报》2005年第5期525-528,共4页The Chinese Journal of Process Engineering

基　　金：SupportedbytheNationalNaturalScienceFoundationofChina(No.50274076)andtheNationalKeyFundamentalResearchandDevelopmentProgramofChina(No.2005CB623702)

摘　　要：Focusing on the most important NaAl(OH)4-NaOH-H2O system in the industry of alumina production, the feasibility of establishing a calculation model of activity coefficients according to Debye-Hückel theory via the equilibrium solubility data of sodium aluminate solution is discussed in this paper. Firstly, the hypotheses for applying Debye-Hückel theory into NaAl(OH)4-NaOH-H2O system are involved and the values of parameters are determined. Then the applicability of Debye-Hückel model in NaAl(OH)4-NaOH-H2O system is testified. The results indicate that Debye-Hückel model is applicable to the establishment of calculation model of activity coefficients in NaAl(OH)4-NaOH-H2O system and the value of -NaAl(OH)4 is estimated as 0.3595 nm.Focusing on the most important NaAl（OH）4-NaOH-H2O system in the industry of alumina production, the feasibility of establishing a calculation model of activity coefficients according to Debye-Hückel theory via the equilibrium solubility data of sodium aluminate solution is discussed in this paper. Firstly, the hypotheses for applying Debye-Hückel theory into NaAl（OH）4-NaOH-H2O system are involved and the values of parameters are determined. Then the applicability of Debye-Hückel model in NaAl（OH）4-NaOH-H2O system is testified. The results indicate that Debye-Hückel model is applicable to the establishment of calculation model of activity coefficients in NaAl（OH）4-NaOH-H2O system and the value of aNaAl（OH）4 is estimated as 0.3595nm.

关 键 词：NaAl(OH)4-NaOH-H2O体系 Debye-Hiickel模型 适用性 活动系数 氧化铝 

分 类 号：TF821[冶金工程—有色金属冶金]