典型文献
Behavior of phase transformation of Baotou mixed rare earth concentrate during oxidation roasting
文献摘要：
Based on the new process named"Combination Method"for metallurgy and separation of Baotou mixed rare earth concentrate(BMREC),the aim of this paper is to clearly elucidate the phase change behavior of BMREC without additives during oxidative roasting at 450-800℃.The results indicate that the bast-naesite in BMREC is decomposed at 450-550℃,the weight loss is about 10.3 wt％,and the activation energy(E)is 144 kJ/mol.The bastnaesite in BMREC is decomposed into rare earth fluoride,rare earth oxides(La2O3,Ce7O12,Pr6O11 and Nd2O3),and CO2,particularly,with the increase of roasting tempera-ture,bastnaesite in BMREC is more completely decomposed into LaF3,which causes a decrease in leaching rate of La during the HCl leaching process.Additionally,the maximum cerium oxidation effi-ciency reaches about 60 wt％when the roasting temperature is equal to or above 500℃,and the oxidation reaction rate of cerium increases with the increasing roasting temperature.
文献关键词：
中图分类号：
作者姓名：
Deliang Meng;Meng Wang;Zongyu Feng;Chao Xia;Yanyan Zhao;Xiaowei Huang
作者机构：
School of Metallurgy,Northeastern University,Shenyang 110819,China;National Engineering Research Center for Rare Earth Materials,GRINM Group Co.,Ltd.,Beijing 100088,China;General Research Institute for Nonferrous Metals,Beijing 100088,China;GRIREM Advanced Materials Co.,Ltd.,Beijing 100088,China
文献出处：
引用格式：
[1]Deliang Meng;Meng Wang;Zongyu Feng;Chao Xia;Yanyan Zhao;Xiaowei Huang-.Behavior of phase transformation of Baotou mixed rare earth concentrate during oxidation roasting)[J].稀土学报（英文版）,2022(06):981-987
A类：
BMREC,bast,naesite,Ce7O12
B类：
Behavior,phase,transformation,Baotou,mixed,rare,earth,concentrate,during,oxidation,roasting,Based,new,process,named,Combination,Method,metallurgy,separation,aim,this,paper,clearly,elucidate,change,behavior,without,additives,oxidative,results,indicate,that,decomposed,weight,loss,about,wt,activation,energy,kJ,bastnaesite,into,fluoride,oxides,La2O3,Pr6O11,Nd2O3,particularly,more,completely,LaF3,which,causes,decrease,leaching,HCl,Additionally,maximum,cerium,effi,ciency,reaches,when,temperature,equal,above,reaction,increases,increasing
AB值：
0.475864
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