摘要
本文研究了在硝酸体系中,HDEHP萃取镧和锕的机理及影响镧和锕萃取分离的因素,给出了镧和锕分配系数的数学模型。在此基础上,进行了试验管串级和离心萃取器逆流萃取实验,实金结果表明:镧的收率大于95%,放射性去污因子大于500倍,钙去污因子大于1000倍,产品符合荧光材料的要求。给出HDEHP去除氧化镧中放射性的工艺流程,可用于工业生产。
The extraction machanism and separation process of lanthanum and actinium were studied in HDEHP(kerosene)--HNO_3 system.The mathematical model for the extraction of lanthanum and actinium by 50% HDEHP was given from the experimental results.The test tube bench scale and multistage countercurrent extraction by centrifugal extractors were carried out for removal α-radioactivity of La_2O_3.The results showed that she recovery of lanthanum was more than 95% at proper condition decontamination factor was more than 500 for a-radioactivity and more than 1000 for calcium.The quality of La_2O_3 product was satisfied with the demand of phosphour material.
出处
《核科学与工程》
CSCD
北大核心
1989年第2期151-161,6,共11页
Nuclear Science and Engineering