Thermal decomposition mechanism of low-content-fluorite Bayan Obo rare earth concentrate roasted with sodium carbonate and its consequent separation study

作     者：Dan Zou Ji Chen Jiashi Hu Kai Li Deqian Li Dan Zou;Ji Chen;Jiashi Hu;Kai Li;Deqian Li

作者机构：State Key Laboratory of Rare Earth Resources UtilizationChangchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of ChinaHefei 230026China College of Chemistry and Chemical EngineeringInner Mongolia UniversityHohhot 010021China 

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

年 卷 期：2020年第38卷第9期

页      面：994-1002,I0003页

核心收录：

学科分类：080603[工学-有色金属冶金] 0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0806[工学-冶金工程] 0708[理学-地球物理学] 0703[理学-化学] 

基　　金：Project supported by the National Basic Research Program of China(2012CBA1202) the National Natural Science Foundation of China(51174184) the Key Research Program of the Chinese Academy of Sciences(KGZD-EW-201-1) 

主　　题：Thermal decomposition mechanism Bayan Obo RE concentrate Na2CO3 Technique CeF3 Rare earths 

摘      要：Thermal decomposition and phase transformation for the mixture of Bayan Obo rare earth concentrate(BORC)and sodium carbonate(Na2CO3)roasted at different temperatures with weight ratio of 100:20 were studied in detail in our *** aim of our study is to reveal the nature of roasting reaction between BORC and Na2CO3 and thus providing a new method for processing *** results indicate that BORC can be decomposed completely with Na2CO3 at around 600℃after 3 *** the calcination process,Ce0.5Nd0.5O1.75,NaF,Na3PO4,and a rare earth double phosphate phase Na3RE(PO4)2 are formed after the decomposition of BORC with *** addition,the thermal decomposition mechanism is determined in the *** on these facts,a clean technique processing BORC was *** a CeF3 powder,whose composition was measured and stability was also evaluated,was obtained for some potential application from the new *** research is of significance in terms of the Na2CO3-roasting BORC solid reaction study and sheds a light on a potential clean technique for BORC.