KCl-NaCl-NaF-(SiO_2)熔盐体系初晶温度的研究  

Study on Primary Crystallization Temperature of KCl-NaCl-NaF-(SiO_2) Molten Salt System

作　　者：何小凤[1] 李运刚[1] 李智慧[1] 

机构地区：[1]河北理工大学,河北唐山063009

出　　处：《有色金属（冶炼部分）》2008年第4期12-15,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(50474079)

摘　　要：采用差热分析法测定KCl-NaCl-NaF-(SiO2)体系的初晶温度,根据测定的数据得出了KCl-NaCl-NaF-(SiO2)熔盐体系初晶温度的回归方程,分析了组元NaF对KCl-NaCl-NaF-(SiO2)体系初晶温度的影响。结果表明:KCl-NaCl-NaF-(SiO2)体系初晶温度随着组元NaF摩尔含量的增加而增大,同时通过对熔盐的X射线衍射分析及各物质间反应的热力学分析,表明SiO2对KCl-NaCl-NaF体系初晶温度影响很小。The initial crystallization temperatures of the KCl-NaCl-NaF-（SiO2 ） system were measured with DTA, regression equation about initial crystallization temperature of the system was gained according to the data measured. The influence of NaF on initial crystallization temperature was analysed. The results indicate that the initial crystallization temperatures of KCl-NaCl-NaF-（SiO2 ） system increases with increasing of NaF content, At the same time, it show that the influence of SiO2 on initial crystallization temperatures of KCl-NaCl-NaF system isn＇t obvious by X-ray diffraction and thermodynamic analysis.

关 键 词：SIO2 KCl-NaCl-NaF熔盐体系 初晶温度 

分 类 号：TF803.27[冶金工程—有色金属冶金]