摘要
研究了相接触时间、相比、硝酸浓度对锆萃取性能的影响,并通过台架试验研究了流比、料液酸度、洗涤级数、萃取级数、铀浓度对Pu产品中Zr净化效果的影响。结果表明:流比(2AF∶2AX)、料液(2AF)中HNO3浓度、洗涤级数对Zr的净化具有显著的影响,而铀浓度对Zr的净化效果影响有限。台架温试验证明,选择的优化工艺可以满足Pu的收率和Pu产品中Zr的净化因子大于100的要求。
The influences of the time of phase contact,the phase ratio,the concentration of HNO3 on the extraction of Zr in nitric acid solution and the influences of flow ratio,the concentration of HNO3 in 2AF,the stage number of the extraction and scrubbing sections and the concentration of uranium in 2AF on counter current extraction process have been studied in this work.The results show that there is a significant impact for the removal of Zr by flow ratio(2AF∶2AX),the concentration of HNO3 in 2AF,the stage number of the scrubbing section.Though there is a limited impact for the removal of Zr by the concentration of uranium in 2AF.The better extraction technology was verified through bench scale test.The decontamination factor(DF)of Zr is about 163,much higher than the design value.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2015年第2期65-70,共6页
Journal of Nuclear and Radiochemistry
关键词
PUREX流程
Pu纯化循环
锆
净化因子
Purex process
plutonium purification cycle
zirconium
decontamination factor