硫酸钴溶液深度净化工艺研究.pdf

第32卷第3期
矿冶工程
Vol 32 No3
2012年06月
MINING AND METALLURGICAL ENGINEERING
June 2012
硫酸钴溶液深度净化工艺研究
李俊,滕浩2,郑雅杰
(1.内蒙古西部治金有限责任公司,内蒙古巴彦萍尔015000;2.中南大学治金科学与工程学院,湖南长沙410083)
摘要:以氧化酸浸和化学沉淀除铁砷后得到的硫酸钴溶液为原料,制备杂质含量低的硫酸钴溶液。研究结果表明:当氟化铵用
量为1.8倍理论用量,反应温度为60℃,Ca、Mg去除率分别为98.51%和96.62%。P2萃取除Zn,当萃原液pH值为3.5,Pw体积
分数为20%,有机与水相的体积比为1:1,Zn去除率达到9.39%,Mn去除率为49.02%,Co直收率为99.19%。P萃取除Mn,
当萃原液pH值为2.5,P体积分数为10%,采用3级逆流萃取,Co直收率达到96.23%,Mn去除率为96.5%,溶液中Mn浓度仅为
0.023g/L。Pm萃取Co,当萃原液pH值为4.0,Psm体积分数为10%,有机相与水相的体积比为1:1,采取5级逆流萃取,Co萃取率
达到99.72%,NMi去除率98.7%,萃取余液中Co浓度仅为0.041g/L。钴总回收率达到94.7%。
关键词:钴;萃取;P2;Psm;硫酸钴;钴镍分离;除锰;除镁
中图分类号:TFO9
文献标识码:A
文章编号:0253-609(2012)03-0099-04
Advanced Purification Process for Cobalt Sulphate Solution
LI Jun, TENG Hao?, ZHENG Ya-jie
Science and Engineering, Central South University, Changsha 410083, Hunan, China/e
(1. Inner Mongolia West Metallurgy Company, Bayannur 015000, Inner Mongolia, China; 2. School of Metallurgica
Abstract High-purity cobalt sulphate solution was prepared with the cobalt sulphate solution as raw material attained
after removing Fe and As by oxidation acid leaching and chemical precipitation. The results showed that the removal
rates of Ca and Mg were 98.51% and 96. 62% respectively when the dosage of NHF was 1.8 times of its theoretical
content and the reaction temperature was 60 C. When P, was used to extract Zn, the removal rates of Zn and Mn
were up to 99. 39% and 49.02% respectively, and the recovery rate of Co was 99. 19% under the condition of initial
H of 3. 5, P x volume fraction of 20% and organic-aqueous phases volume ratio of 1: 1. When P2 was used to extract
Mn through 3-stage counter-current extraction, the recovery rate of Co was 96. 23%, and the removal rate of Mn was
96.5% wth a content of 0.023 g/ in the sol on under the ondition of initial PH of 2.5 and P volume fraction of
10%. When P, m was used to extract Co through 5-stage counter-current extraction, under the condition of initial PH of
4, Ps volume fraction of 10% and organic-aqueous phases volume ratio of 11, the extraction rate of Co was 99.72%
the removal rate of Ni was 98 7% and the concentration of Co in the solution was only 0. 041 g/L. The overall recovery
rate of Co was up to 94. 7%0
Key words: cobalt; extraction; P; Psm; cobalt sulphate solution; cobalt-nickel separation; manganese removal
magnesium removal
钴作为一种重要的战略金属,广泛应用于航空航
工业中常用除钙、镁的方法有氟盐沉淀法、萃取法
天、电机电器、机械、化工、陶瓷和电池工业等领等。当钙镁杂质含量较高时,可用氟盐沉淀法除去;当
域列。在自然界中,钻矿一般很少以独立的矿床存溶液中钙镁含量较低时,可在萃取净化过程中与其它
在,绝大多数都以硫化矿、氧化矿、砷化矿的形式伴生杂质一起除去°。
于镍、铜、铁、铅、锌等矿床中,钻含量较低?。因此,
常用的钴与锌和锰的分离方法有沉淀法、萃取法
各种含钴原料经过火法或湿法初步处理后得到的含钴离子交换法等。沉淀法常用于钴锰锌的初步分离,而
溶液中杂质含量高,必须经过其它处理得到杂质含量萃取法、离子交换法主要用于钴与锌和锰的深度分
低的含钴溶液。
离
9-1
①收稿日期:2011-12-20
基金项目:广东省教育部产学研重大项目(2008A090300016)
作者简介:李俊(1974-),男,云南楚雄人,工程师,主要从事低品位黄铜矿生物治金应用技术及有色金属选矿应用实践工作。
通讯作者:郑雅杰(1959-),男,湖南常德人,教授,博士生导师,从事冶金、水污染控制、资源综合利用研究。