Removal of impurity metals from waste printed circuit board copper powder of cash machine

被引：1

作者：

Liu W.-F. ^{[1
]}

Wu S. ^{[1
]}

Zhang D.-C. ^{[1
]}

Chen L. ^{[1
]}

Yang T.-Z. ^{[1
]}

Yang Y. ^{[2
]}

机构：

[1] School of Metallurgy and Environment, Central South University, Changsha

[2] School of Minerals Processing and Bioengineering, Central South University, Changsha

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2023年 / 33卷 / 12期

关键词：

controlled potential oxidation leaching; metal recovery; pressure oxidative leaching; waste printed circuit board;

D O I：

10.11817/j.ysxb.1004.0609.2023-44018

中图分类号：

学科分类号：

摘要：

Waste printed circuit board (WPCB) copper powder of cash machine is usually extracted valuable metals by pyrometallurgical copper smelting system. In this paper, a two-stage leaching method was proposed to separate the impurity metals in the WPCB copper powder and provided high-quality raw materials for copper smelting. Firstly, the WPCB copper powder was leached by hydrochloric acid to remove aluminum, the dealuminated residue were separated and recovered lead and tin by hydrochloric acid controlled potential oxidation leaching or alkaline pressure oxidation leaching. The results show that 96.11% aluminum is selectively removed by hydrochloric acid leaching. The dealuminated residue is leached by hydrochloric acid controlled potential oxidation, the leaching rates of lead and tin are 91.12% and 94.69%, respectively. The dealuminated residue is treated by alkaline pressure oxidation leaching, the leaching rates of lead and tin are 86.28% and 96.96%, respectively. In the breaking process of WPCB, due to the mechanical impact force, the impurity metal and copper are bonded to each other, which is difficult to fully dissolve, resulting in incomplete removal of lead and tin. © 2023 Central South University of Technology. All rights reserved.

引用

页码：4152 / 4165

页数：13

共 23 条

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