混合稀土精矿氧化焙烧过程中氟的逸出规律研究  

Study of Fluorine Escaping in Calcining Process of Mixed Rare Earth Concentrate

作　　者：吴志颖[1] 吴文远[2] 孙树臣[2] 边雪[2] 涂赣峰[2] 

机构地区：[1]渤海大学物理系,辽宁锦州121013 [2]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《稀土》2009年第6期18-21,共4页Chinese Rare Earths

基　　金：国家自然科学基金项目资助(50574031);高等学校博士学科点专项科研基金资助课题(20030145015)

摘　　要：利用气相色谱技术研究混合稀土精矿焙烧过程中氟的逸出规律,分别对混合稀土精矿在400℃~750℃下焙烧30min^120min的各个条件进行实验,测出不同条件下焙烧气体中的氟总量、逸出率、混合稀土精矿的分解率以及焙烧产物的物相组成,分析了氟的逸出率与焙烧温度、焙烧时间和环境湿度等因素间的关系,揭示了氟逸出的化学反应机制,为控制环境污染、优化处理工艺提供依据。GC technology was used to study fluorine escaping in calcining process of mixed rare earth concentrate.The mixed rare earth concentrate was calcined at 400℃～750℃ for 30min～120min,and the total of fluorine,exhausting ratio of fluorine,decomposition ratio and the component were determined.The relations of exhausting ratio of fluorine with roasting temperature and roasting time and the increase of RH were analyzed.This method supplied basis for low energy and clean decomposition of mixed rare earth concentrate.

关 键 词：混合稀土精矿 焙烧 氟 逸出规律 气相色谱 

分 类 号：O614.33[理学—无机化学]