稀土分离萃取设备的选择和应用

本文介绍了各类萃取设备的特性及其适用条件。讨论了不同萃取设备用于稀土分离的可行性及其对技术、经济指标带来的影响。选用振动柱作为还原萃取设备，产出了纯度＞９９．９９％的Ｅｕ２Ｏ３。选用离心萃取器，克服了环烷酸萃取体系粘度大不好分相，操作不稳定的缺点。由于离心萃取器中物料占有量比混合澄清槽小得多，大大降低了Ｐ（５０７）体系中萃取剂的用量，使稀土分离厂的投资大幅度降低。

Selection and Application of Extractors in Separating Rare Earth Elements

The general features of all kinds of extractors were compared in this paper.The applicability of all kinds of extraction devices and the influence on technological and economic tar- get were studied and the characteristics of separating rare earth elements by solvent extraction were discussed. The super purity Eu203(>99. 99%)was obtained in the process with reciprocating plate col- umn as the main equipment of reducing extraction. The difficulty caused by high viscosity in oper- ating in naphthenic acid(HA)system was overcome,and amount of EHEHPA(P(507))in the equip- ment was greatly reduced by using centrifugal extractor in industrial test facility,All the experi- ments have proved that it is feasible using the centrifugal extractor in the separate extraction of rare earth elements.