The Accuracy Comparison of Calculation Method of Effective Separation Factor for Multi-components

The accuracies of calculation methods of effective separation factor in countercurrent extraction for rare earth were investigated by error analysis of calculation results with average fraction method,equivalent component method and product fraction method.The error analysis indicated that the accuracies of average fraction method,equivalent component method and product fraction method were very high near minimum effective separation factor.Near the maximum effective separation factor,the accuracies of equivalent component method and product fraction method were lower and the accuracy of average fraction method was higher.Near the maximum effective separation factor,the accuracies of equivalent component method and product fraction method were very low,and the accuracy of average fraction method was very high.In comparison with mathematical model method,the accuracies of average fraction method and equivalent component method were higher,and the accuracy of product fraction method was lower.Average fraction method was much more accurate and suitable than equivalent component method or product fraction method.