HCl-H_2O_2溶液浸出氟碳铈矿的研究  

HCl-H_2O_2 Solution Leaching of Bastnaesite

作　　者：李梅[1] 邹吉文[1] 张栋梁[2] 高凯[2] 郭财胜 陈燕飞[1] 

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古自治区稀土现代冶金新技术与应用重点实验室,内蒙古包头014010 [2]北京化工大学材料科学与工程学院,北京100029

出　　处：《中国稀土学报》2015年第1期87-94,共8页Journal of the Chinese Society of Rare Earths

基　　金："十二五"国家科技支撑计划项目(2012BAE01B01);国家高技术研究发展计划(863计划)项目(2012AA061904);国家杰出青年基金项目(51025416);国家重点基础研究发展计划(2011CB411911)资助

摘　　要：以混合型稀土精矿为研究对象,采用HCl-H2O2溶液浸出氟碳铈矿,达到独居石与氟碳铈矿分离的目的。考察了焙烧温度、盐酸浓度、液固比、双氧水用量、浸出温度、浸出时间等对稀土精矿浸出率的影响规律,并得出最佳浸出工艺条件为:焙烧温度:600℃,焙烧时间:2 h,盐酸浓度:6 mol·L-1,液固比:30∶1,双氧水用量:10 m L,浸出温度:90℃,浸出时间:90 min。通过此实验条件,稀土精矿中氟碳铈矿的浸出率达到了98.69%,使稀土精矿中的氟碳铈矿大部分进入溶液中,达到与独居石分离的目的,为浸出氟碳铈矿的工艺提供新思路。In order to separate monazite and bastnaesite, using Baotou mixed rare earth concentrate as the research object, and HCl-H2O2 as bastnaesite leachate. The conditions affecting the rare earth concentrates leaching ratio in the process, including roasted temperature, hydrochloric acid concentration, ratio of liquid to solid, volume of hy- drogen peroxide, leaching temperature and leaching time, were investigated. The results indicated that roasted tern- perature was 600 ℃, roasted time 2 h, hydrochloric acid concentration 6 mol·L-1 , ratio of liquid to solid 30 ： 1, volume of hydrogen peroxide 10 mL, leaching temperature 90 ℃, leaching time 90 min under the optimized condi- tions. Under this condition, the leaching rate of bastnaesite was 98.69%, most of bastnaesite enter acid leaching, the purpose of separation was achieved and the new ideas was provided for leaching bastnaesite by this article

关 键 词：氟碳铈矿 独居石 焙烧 浸出 分离 稀土 

分 类 号：O614.3[理学—无机化学]