(南昌航空大學 環(huán)境與化學工程學院，南昌 330063)
摘 要:
關(guān)鍵字: 多組分；稀土；串級萃取；有效分離系數(shù)；理論規(guī)則；平均分數(shù)法
（School of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China）
Abstract:The theoretical rules for effective separation factor of multi-component rare earths in counter-current extraction were investigated by mathematical expression. The average fraction method to calculate effective separation factor was presented. Theoretical analyses were made to the calculation results by equivalent component method (EC), product fraction method (PF) and average fraction method (AF). The results show that there are Rule Extremum, Rule Proportion and Rule Weight for the factor. Only average fraction method could completely follow these three rules. The calculation results by average fraction method range between the maximum and minimum, and the movement trends of calculation results are in reason along with component mole fractions. The errors of extremums by average fraction method are 0. In the entire space range the average fraction method is much more accurate than the others.
Key words: multi-component; rare earth; countercurrent extraction; effective separation factor; theoretical rule; average fraction method
