摘要
现有稀土湿法冶金过程中对钍的去除，不论是酸法或碱法，一般采用选择性沉淀（ｐＨ１．０５）法、萃取法或分级沉淀分级结晶法，其原理是基于钍与稀土在特定条件下分配系数Ｋ的区别，但不足之处是钍在过程中多处分布，并影响环境保护和稀土产品质量．本文综合分析了钍的特性及其在阴阳离子交换树脂上的行为后，提出了用离子交换色层工艺可将钍除掉的新方案．
In the current hydrometallurgy processing of rare earths, the methods, such as selected precipitation (pH1.05), (liquid) extraction, or fractional precipitation-fractional crystallization, are usually ed to remove thorium. regardless of the acid or the alkaline proeess. The principle of there methods is based on the difference in partition value K between thorium and rare earths. The insufficiency of above methods in processing is that the thorium partitioned into several parts, may impair the purity of certain final individual rare earth product and environmental protection. In order to improve the removal of thorium from rare earth, the character of thorium and its behaviour on cation and anion ion exchanger are analyzed. On the basis of above analysis the cation and anion ion exchange chromatography is proposed as a new technology in rare earth hydrometallurgy processing for better removal of thoritum from rare earth.
出处
《北京理工大学学报》
EI
CAS
CSCD
1995年第3期289-293,共5页
Transactions of Beijing Institute of Technology
关键词
稀土族
离子交换树脂
离子交换色层
钍
湿法冶金
rare earth series
ion-exchanger resins/partition values
ion-exchange chromatography technology
