Technical study on the treatment of PCB production waste liquid and copper extraction

College of Information Engineering, Shaanxi Institute of International Trade & Commerce, Xi’an 712046, Shaanxi, China

^* Corresponding author: 24131266@qq.com

Abstract

The increase in the use of electronic products has increased the production of printed circuit boards, in the production of circuit boards in the etching, micro-etching process, will produce a large number of high concentration of copper-containing etching waste liquid, these waste liquid, if directly discharged, will not only cause serious pollution to the human living environment, but also a large number of copper resources will be wasted. Therefore, this paper adopts a closed circulation system to treat the etching mother liquor discharged from the production line, extracting copper ions from the high concentration copper-containing etching liquid, and then returning the low concentration copper-containing etching liquid to the production line, which can not only effectively recover copper resources, but also make the pollution emission of etching waste liquid zero and not produce secondary pollution, so as to realize the harmony between human and nature by increasing production without increasing pollution. Development.