Kinetics of mixed rare earths minerals decomposed by CaO with NaCl-CaCl_2 melting salt

作     者：边雪 陈建利 赵志华 尹少华 罗瑶 张丰云 吴文远 

作者机构：School of Materials & MetallurgyNortheastern University Inner Mongolia Baotou Steel Rare Earth High-tech Co. Ltd. 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2010年第28卷第S1期

页      面：86-90页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project supported by the National Natural Science Foundation of China (50974042) Scientific Research Special Foundation of Doctor Subject of Chinese Universities (20090042120015) The Fundamental Research Funds for the Central Universities (N090302007) 

主　　题：mixed rare earths minerals CaO-NaCl-CaCl2 kinetics decomposition 

摘      要：For increasing reaction rate and reducing decomposing temperature,TG-DTA,XRD,SEM and Chemical analysis were used to study the kinetics of mixed rar e earths minerals decomposed by CaO with NaCl-CaCl2. The results showed that the reaction rate increased with increasing of NaC-CaCl2 addition,CaO addition,an d decomposition temperature. The kinetics of mixed rare earths minerals decompos ed by CaO conformed to 1-2/3X-(1-X) 2/3=kdt mode. The decomposition reaction rate was controlled by two steps,and the activation energy was decreased with addin g of NaCl-CaCl2 melting salt. The micro-pattern of products was loosening and po rous with NaCl-CaCl2 in decomposition system.