从铜镉渣浸出液中电加强置换提取镉 - 中国有色金属学报.pdf

第 25 卷第 8 期 中国有色金属学报 2015 年 8 月 Volume 25 Number 8 The Chinese Journal of Nonferrous Metals August 2015 文章编号：1004-0609(2015)08-2268-08 从铜镉渣浸出液中电加强置换提取镉 杨建广，雷 杰，彭思尧，何 静，戚春萍，王夏阳，李焌源 ( 中南大学 冶金与环境学院，长沙 410083) 摘 要：采用电加强置换提镉新工艺从铜镉渣浸出液中直接提取海绵镉，以锌板为阳极、钛板为阴极，通过正交 试验和单因素试验相结合的方法，考察温度、溶液 pH 、异极距、电流密度、阴阳极板面积比等因素对镉提取率 的影响以及海绵镉的品位。结果表明：在温度为40 ℃、pH 为 1、异极距为5 cm、电流密度为200 A/m2 、阴阳极板 面积比为 1:3 的试验条件下，料液中镉提取率大于97%，所得海绵镉中镉品位大于 85%，可直接用于压团制精镉。 关键词：铜镉渣；浸出液；电加强置换；海绵镉 中图分类号：TF819.2 ；X758 文献标志码：A Extraction of cadmium from leaching solution of Cu-Cd slag through electrically enhanced replacement process YANG Jian-guang, LEI Jie, PENG Si-yao, HE Jing, QI Chun-ping, WANG Xia-yang, LI Jun-yuan (School of Metallurgy and Environment, Central South University, Changsha 410083, China) Abstract: Cadmium was extracted from the leaching solution of Cu-Cd slag by electrically enhanced replacement process using zinc plate as anode and titanium plate as cathode. The effects of process parameters, such as temperature, pH value, polar distance, current density and the electrode area ratio of cathode to anode on the cadmium extraction efficiency and the resultant sponge cadmium grade were investigated by orthogonal and single factor experiments. A maximum cadmium extraction rate of more than 97% and sponge cadmium grade of 85% were obtained under the optimized condition of temperature of 40 ℃, pH of 1, polar distance of 5 cm, current density of 200 A/m2, the electrode area ratio of cathode to anode of 1:3. The resultant