设计、加工了一种微型环隙式离心萃取器,并确定了它的操作条件范围。用磷酸三丁酯-硝酸以及2-乙基己基膦酸-2-乙基己基酯-硝酸两个体系做试验,在级停留时间为14—70s时,总稀土传质的级效率为～95％。把19级离心萃取器做的串级试验,同19级分液漏斗做的串级试验作了比较。这种微型萃取器可用于萃取工艺的研究和非平衡萃取的研究,还可为生产上应用大型离心萃取器提供实验数据。 A miniature annulus centrifugal extractor was designed and engineered to determine its range of operating conditions. With tributyl phosphate-nitric acid and 2-ethylhexylphosphonic acid-2-ethylhexyl ester-nitric acid two systems to do the test, the level of residence time of 14-70s, the total rare earth mass transfer efficiency of ~ 95 %. Cascade tests done with a 19-stage centrifugal extractor were compared with cascade tests done with a 19-stage separatory funnel. This miniature extractor can be used for extraction process research and non-equilibrium extraction research, but also for the production of large centrifugal extractor to provide experimental data.