Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第18卷    第10期    总第115期    2008年10月

[PDF全文下载]        

    

文章编号:1004-0609(2008)10-1926-05
多组分稀土串级萃取有效分离系数的理论分析
钟学明

(南昌航空大学 环境与化学工程学院,南昌 330063)

摘 要:

通过数学表达式研究多组分稀土串级萃取有效分离系数的理论规则,提出计算有效分离系数的平均分数法,对等效组分法、产品分数法和平均分数法计算结果进行理论分析。结果表明:有效分离系数存在极值规则、比例规则和权重规则;只有平均分数法完全遵循极值规则、比例规则和权重规则:平均分数法的计算结果,介于极大值和极小值之间,而且随组分摩尔分数变化的趋势是合理的:平均分数法计算的极值误差为0;与等效组分法和产品分数法相比,在整个空间分布中平均分数法的准确度明显更高。

 

关键字: 多组分;稀土;串级萃取;有效分离系数;理论规则;平均分数法

Theoretical analysis of effective separation factor for multi-component rare earths in countercurrent extraction
ZHONG Xue-ming

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

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com