摘要
针对目前氟碳铈矿主流浸出工艺存在的高价值稀土元素镨钕回收率低、流程长、辅料消耗大等问题,提出了以硫酸为络合剂的氟碳铈矿络合浸出新技术,极大地简化了浸出流程,实现了盐酸体系下F^(-)和稀土的协同高效浸出。系统探究了络合剂种类及用量、酸矿体积质量比、浸出温度、浸出时间与液固体积质量比对稀土浸出率的影响,得到最佳工艺条件如下:H_(2)SO_(4)作为络合剂,其用量为氟碳铈熟矿质量的1%,酸矿体积质量比为1.1 mL/g,浸出温度为25℃,液固体积质量比为4 mL/g,浸出时间为3 h。在该条件下,镨钕的浸出率由现行工艺的94.51%提升至96.23%。
Aiming at the problems of low recovery rate of high-value rare earth elements praseodymium and neodymium,long process and high consumption of auxiliary materials in the current mainstream leaching process of bastnaesite,a new complex leaching technology of bastnaesite with sulfuric acid as the complexing agent was proposed,greatly simplifying the leaching process and realizing the synergistic efficient leaching of F^(-)and rare earth in hydrochloric acid system.The effects of complexing agent types and dosages,acid-ore volume-mass ratio,leaching temperature,leaching time and liquid-solid volume-mass ratio on the rare earth leaching rate were systematically investigated.The obtained optimum process conditions are as follows:complexing agent is sulfuric acid,sulfuric acid dosage is 1%of the mass of bastnaesite roasted ore,acid-ore volume-mass ratio is 1.1 mL/g,leaching temperature is 25℃,liquid-solid volume-mass ratio is 4 mL/g and leaching time is 3 h.Under these conditions,the leaching rate of praseodymium and neodymium increases from 94.51%of the current process to 96.23%.
作者
吴金玲
阳启华
张文娟
WU Jin-ling;YANG Qi-hua;ZHANG Wen-juan(Liangshan Rare Earth Co.,Ltd.,China Rare Earth Group Co.,Ltd.,Xichang 615000,China;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《稀有金属与硬质合金》
北大核心
2025年第3期8-13,共6页
Rare Metals and Cemented Carbides
基金
中央高校基本科研业务费项目(FRF-TP-19-036A2)
中国博士后科学基金项目(2018T110045)。
关键词
氟碳铈矿
络合剂
H2SO4
浸出
工艺条件优化
bastnaesite
complexing agent
H2SO4
leaching
process condition optimization
