环隙式离心萃取器快速提取钚的应用研究  

Application study on fast extracting plutonium with annular centrifugal extractor

作　　者：肖成建[1] 胡永波[1] 古梅[1] 玄浩 刘雪梅[1] 罗阳明[1] 李伟[1] 胡胜[1] 郝樊华[1] 龚建[1] 汪小琳[3] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900 [2]北京萃取应用技术研究所,北京100015 [3]中国工程物理研究院,绵阳621900

出　　处：《核技术》2013年第1期76-80,共5页Nuclear Techniques

摘　　要：以小型环隙式离心萃取器为核心器件,设计了一套用于钚元素的环隙式离心萃取系统。该系统在2000 8000 r/min离心转速和1/3-1两相流比(o/a)范围内,水力学性能表现良好,无明显夹相;以0.1 mol/L TOPO/环己烷为萃取体系,0.01 mol/L草酸溶液为反萃体系,在短时间内完成6 mol/L HNO3溶液中Pu(IV)的萃取分离操作,其中两级萃取率大于90%,单级反萃率超过96%,显示出该系统萃取速度快、效率高的特点,可用于钚元素的快速提取。An extraction system with annular centrifugal extractors has been designed to separate plutonium. It worked well when centrifugal speed was ranged from 2000 to 8000 r/min and organic-aqueous flow ratio （o/a） ranged from 1/3 to 1, without obvious entraining phenomenon. Pu（IV） in 6 mol/L HNO3 solution was fast extracted and separated, using 0.1 mol/L TOPO/Cyclohexane as extraction solvent and 0.01 mol/L oxalic acid as back extraction solvent. The extraction ratio of two stages was larger than 90%, and the back ratio per stage was more than 96%. The extraction system shows fast operating speed and high extraction ratio, therefore it is suitable for fast extracting Pu.

关 键 词：离心萃取器 钚 快速萃取 分离 

分 类 号：TF88[冶金工程—有色金属冶金] O6-332[理学—化学]