Comparison of Economical and Technical Indices on Rare Earth Separation Processes of Bastnasite by Solvent Extraction

According to the composition of rare earth ores and the market, several feasible separation processes of bastnasite in Baotou of Inner Mongolia and Mianning of Sichuan by solvent extraction in HEH(EHP) HCl system were presented. The parameters of the processes such as stage numbers, volume of mixer settler, fixed investment of extractant and rare earths, consumption of chemical reagents including HCl and NH 3 were calculated and compared. The results show that the novel scheme can save cost more than 20% compared with those of others. By the economical analysis, the optimized separation process of bastnasite was obtained, which can be applied to the treatment of monazite too.

中钇富铕稀土矿萃取分离流程的经济技术指标比较

根据当前国内外市场可预测的产品结构， 针对中钇富铕矿为代表的离子吸附型稀土矿， 提出了三种可行的Ｐ５０７ＨＣｌ 体系和环烷酸ＨＣｌ 体系相结合的稀土萃取全分离工艺流程， 比较了各流程的槽体级数和容积， 有机相和稀土存槽量， 盐酸和液氨消耗以及控制要求等。从经济技术指标角度得到了中钇富铕稀土矿分离的最优化工艺流程， 可节省投资５ ％ ～５０ ％ 。

氟碳铈镧矿稀土萃取分离流程的经济技术指标比较

根据国内外市场可预测的产品结构，针对包头矿和冕宁矿为代表的氟碳铈镧矿，提出Ｐ５０７ＨＣｌ体系稀土萃取全分离的几种可行工艺流程，比较各流程的槽体级数、容积，有机相、稀土存槽量，盐酸、液氨消耗及控制要求等，由经济技术指标角度得到了从氯碳铈镧矿分离稀土的优化工艺流程。