LIX984从高酸硝酸铜体系中萃取回收铜试验研究.pdf

第24卷第4期
2015年8月
MINING METALLURGY
August 2015
文章编号:1005-7854(2015)04-0060-05
LIX984从高酸硝酸铜体系中萃取
回收铜试验研究
吴小明沈强华陈变
(昆明理工大学冶金与能源工程学院,昆明650093)
摘要:针对高浓度硝酸-硝酸锎体系,采用LX984两段萃取回收铜。对影响萃取的主要因索进行优
化试验,得出的一次萃取最佳试验条件为:水相初始pH值为2.0、萃取剂体积浓度为30%、油液相比
(0/A)为2:1、萃取温度为25℃、萃取时间为4min;二次萃取最佳试验条件为:水相初始pH值为2.0
萃取剂体积浓度为10%、相比为1:1、萃取温度为25℃、萃取时间为2min,铜的总回收率达到9.5%。
该工艺相比于硝酸铜电积、沉淀法和置换法,有流程简单、成本低、铜回收率高且无二次污染等优点。
关键词:LIX984;萃取;HNO3-Cu(NO2)2体系
中图分类号:TF804.2:TF811文献标志码:Adoi:10.3969/iis.10057854,2015.04.014
EXPERIMENTAL STUDY ON THE EXTRACTION OF COPPER FROM
HIGH ACID COPPER NITRATE SYSTEM BY LIX984
WU Xiao-ming SHEN Qiang-hua CHEN Wen
Faculty of Metallurgical and Energy Engineering of Kunming University of Science and echnology
Kunming 650093, China
ABSTRACT: In view of the high acid HNO -Cu(NO ) system, this paper adopts the way of two stage extraction
to recover copper by 1 X984. Through the study of the optimization of the main factors influencing the extraction
the optimum experiment conditions are obtained for the first stage of the extraction the initial PH value of the aque
ous phase is 2.0, the volume concentration of extractant 30%, the phase ratio 2: 1, the extraction temperature
and the time of agitating 4 min; for the second stage of the extraction the initial PH value of the aqueous
phase is 2.0, the volume concentration of extractant 10%, the phase ratio 1: 1, the extraction temperature 25 C
and the time of agitating 2 min. At this time, the total recovery rate of copper reached 99. 5%. Compared with cop
per nitrate electrodeposition, precipitation and displacement methods, this technology has advantages of simple
process, low cost, high copper recovery and no secondary pollution, etc
KEY WORDS: L1X984; extraction; HNO, -Cu(NO,), system
目前,从硝酸铜废水中回收铜的方法,主要有沉废液中,将Cu2'等沉淀析出,沉淀后清洗、烘干,再
淀一电解法、置换一电解法。沉淀一电解法所采用氢气还原,将还原后的粗铜熔炼浇铸成板,再进行
用的沉淀剂为碳酸钠,原理是将碳酸钠加入硝酸铜电解提纯。这种方法的缺点是回收过程繁琐,流程
长。置换一电解法是用铁粉置换,置换出的铜粉清
收稿日期:2013-12-02
洗后再烘干,熔炼浇铸成板后,电解提纯。它的缺点
作者简介:吴小明,硕土研究生,研究方向为有色金属治金及其也是回收过程繁瑛,流程长。
反应。
某黄金冶炼企业炭浆氰化法提金流程中,铜随
通讯作者:沈强华,副教授。E-mail:137006923267@163.com