TBP萃取铋电解液中的锑.pdf

第24卷第1期
矿冷
Vo.24,No,1
2015年2月
MINING METALLURGY
Feburary 2015
文章编号:1005-7854(2015)01-0035-04
TBP萃取铋电解液中的锑
施学金朱云黎元龙
(昆明理工大学治金与能源工程学院,昆明650093)
摘要:研究用TBP从铋电解液中萃取分离锑鉍,考察了溶液中锑鉍以单组分存在时,初始水相酸度、
TBP浓度和相比对锑铋萃取分离的影响,绘制了锑铋的萃取等温线。结果表明,有机相组成为25%
TBP-7%辛醇一磺化煤油,初始水相酸度为6mol/1,萃取相比O/A=1:1时,锑的萃取分配比最大,鉍
的分配比较小。对于实际铋电解液中萃取分离锑铭,鉍电解液盐酸浓度为4mol/L,相比O/A=1:1,有
机相组成为25%TBP-7%辛醇一磺化煤油时,锑的萃取率为65%;经过3级逆流萃取,锑的萃取率达
关键词:够电解液;萃取分离;萃取等温线;逆流萃取
中图分类号:T817:TF818文献标志码:Adol:10.3969/j.iss1005-7854.2015.01.009
SOLVENT EXTRACTION OF ANTIMONY IN BISMUTH ELECTROLYTE BY TBP
SHI Xue-jin ZHU Yun LI Yuan-long
Faculty of Metallurgical and Energy Engineering, Kunming University of Science
and Technology, Kunming 650093, China)
ABSTRACT: The extraction separation of Sb from Bi electrolyte by tri-butyl phosphate(TBP) was studied. For
the solution in which only ions of antimony and bismuth exist as metal ions, the influence of several variables on the
Sb and Bi extraction separation, including water acidity, TBP concentration and phase ratio(O/A) in aqueous
phase were investigated, the extraction isotherm of Sh and Bi were measured and drawn. The results show that the
distribution ratio of Sb is the largest, the distribution ratio of Bi is the smallest when the organic phase composition
is 25% TBP-7% octanol-sulfonated kerosene, water acidity is 6 mol/L and O/A=1: 1. For the extraction separa-
tion of Sh from Bi in actual electrolyte, the extraction rate of Sh is 65% when the organic phase composition is 25%o
TBP-7% octanol-sulonated kerosene, Bi electrolyte centration of h drochloric acid is 4 mol/L and /A=1: 1
After three stages of counter-current extraction, the extraction rate of Sb is 94. 2%0
KEY WORDS: bismuth electrolyte; extraction separation; extraction isotherm; counter-current extraction
锑是铋电解精炼过程中有害杂质,也是电解程中,必须对铋电解液进行净化除锑。日前,国内外
液净化的主要对象之一。由于锑与电位接近,电研究了多种电解液净化除杂方法,如离子交换法、沉
解精炼铋时,随着电解的不断进行,富集在电解液中淀法、溶剂萃取法等,其中关于溶剂萃取法脱除电解
锑会以化学沉积的方式在阴极鉍上沉淀,导致阴极液中杂质的研究有许多2。有研究报道武金
铋中锑含量升高,品质下降。因此,在铋电解精炼过朋7用TBP与N1923协调萃取铜电解液中的砷锑
鉍,銻的萃取率为72.06%;韩文利以20%N1923
收稿日期:2013-09-24
5%异辛焞一煤油为萃取剂从铜电解液中萃除锑铋,
作者简介;施学金,硕上研究生,专业为有色金属治金
通讯作者:朱云,教授,研究方向为稀有金属治金
锑的萃取率为38%;刘丹丹在氯化介质中用叔
uyun202@sina.com。
胺7301-TBP体系对锑铋铜铅的萃取行为研究时,锑
的萃取率约为95%。针对盐酸介质中铋电解液净