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

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