国内外铀纯化工艺状况

利用计算机检索和手工检索两种手段，就1976年以来国内外铀的纯化工艺情况进行了凋查，对美国、英国、法国、加拿大、印度、韩国、澳大利亚、巴基斯坦、巴西、西班牙、菲律宾、日本、阿根廷和我国的铀纯化及其工艺参数进行了概述。调查表明：目前国内外铀的纯化，除日本、阿根廷采用胺类萃取之外，其它国家普遍采用TBP萃取工艺。为了减少设备体积和试剂消耗，几乎都采用高铀浓度（萃取液中的铀浓度基本上都在300g／L以上）萃取。为了提高纯化效率，一些国家研究采取不用水洗和酸洗而用返回部分纯化的产品液来冲洗负载有机相的方法。萃取设备比较多的采用塔式设备。为了克服过滤上的困难，一些国家还研究了采用浆体萃取的办法。

THE STATUS OF INTERNATIONAL PURIFICATION PROCESS OF URANIUM

The information of international purification process of uranium since 1976 is retrieved by both computer and handwork. The uranium purification processes and parameters in the United States, England, France, Canada, India, Korea, Austrilia, Pakistan, Brazil, Spain,Philippines,Japan,Argentina and China are summarized in this paper.The review show that, in addition to amine extraction in Japan and Argentina, TBP extraction was normally used in the rest countries. In order to reduce the volume of equipments and consumption of reagents,the feed solution with high uranium content (more than 3009/L uranium) was adopted by almost all countries. During scrubbing of loaded organic phase, the methods using partly returned product liquor were studied in some countries and columns were mainly used as extraction equipment so as to improve the purification efficiency. In some countries, pulp extraction was studied to overcome the difficulties in the process of filtering.