【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。更多还原

【Abstract】 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.更多还原