摘要
本文探讨了镍电解阳极液直接进行电解净化除铜处理过程。镍电解阳极液中的ＣＵ２＋离子优先于Ｎｉ２＋离子在镍电极和铜电极上放电还原，其电极过程具有溶液扩散传质步骤控制的动力学规律。在阴极电位不低于－０．５００Ｖ（ｖｓ．ＳＣＥ．）和溶液搅拌条件下，采用多孔镍作阴极在常温下就能使镍电解阳极液的ＣＵ２＋离子浓度降至０．００２ｇ／Ｌ以下，达到深度净化除铜要求。加强溶液搅拌和增大电极面积有利于加快电解净化除铜速度，电解净化除钢产物为９９％以上的金属铜粉。
The electrode process of removing copper from an anolyte of nickel electrolysis by electrowinning has been studied. It was found experimentally that the cathodic reduction of copper ion on copper electrode and nickel electrode has precedenoc over nickel ion and the diffusion is a rate-determining step in copper electrowinning from an anolyte of nickel electrolysis. When the cathodic potential is more positive than -0.500V(vs. SCE.) and the solution agitation is in existrice, the concentration of copper ion in an anolyte of nickel electrolysis falls below 0.002g. L-1 by electrowinning with porous nickel electrodes. The product of electrwinning is pare copper powder. The rate of copper electrowinning is quickened by strengthening solution agitation and increasing the area of cathode.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
1994年第5期32-38,共7页
Journal of South China University of Technology(Natural Science Edition)
基金
国家"八.五"科技攻关项目
关键词
电解
净化
阳极液
炼镍
除铜
s:electrolysis
purification
copper
/nickel electrolysis
anolyte
porous electrode
