氯化法分解氟碳铈精矿提取稀土的研究  

Extraction of Rare Earths From Bastnasite Concentrate by Chlorination Roasting

作　　者：田君[1] 朱国才[2] 池汝安[3] 

机构地区：[1]江西省科学院应用化学研究所 [2]清华大学核能技术设计研究院 [3]清华大学核能技术设计研究院,北京102201

出　　处：《矿冶工程》2000年第1期41-43,共3页Mining and Metallurgical Engineering

基　　金：国家自然科学基金! ( 5980 4 0 0 4 ;59674 0 2 2 1 );国家杰出青年科学基金!资助项目 ( 5972 540 8)

摘　　要：研究了氟碳铈精矿经预脱氟后加氯化铵焙烧分解 ,再用热水浸取焙砂从而制取氯化稀土的新工艺。系统考察了脱氟剂、反应温度、氯化剂用量、氯化时间等因素对氟碳铈精矿稀土提取率的影响 ,并对工艺进行了优化 ;当在 50 0℃下添加相当于矿重 30 %的脱氟剂脱去氟后 ,再在 4 80℃下加入相当于矿重 2倍的氯化铵焙烧 1 5h ,焙砂用热水浸取得到氯化稀土溶液 ,稀土提取率可达 80 %以上 ,浸出液中Fe、Al、Si等非稀土杂质含量很低。A novel process was investigated for extracting rare earth from bastnasite concentrate by chlorination roasting. The effects of defluorinating agent, reaction temperature, NH_4Cl dose and reacting time on the extractive yield of rare earth were studied and the optimum conditions were established based on the experiment results. The process can eliminate most fluorine by baking the ore at 500 ℃ with deflusrinating agent equal to 30 wt% of ore. and further roasting it for 1.5 h at 480 ℃ with NH_4Cl equal to 2 times of ore weight. RE recovery can reach more than 80% and the content of Fe, Al, Si in the RE Leaching Solution is very low.

关 键 词：氯化焙烧 氟碳铈精矿 稀土 

分 类 号：TF845[冶金工程—有色金属冶金]