Circuit Board Micro Waste Etching Ammonia Washing Water Precious Metal Regeneration Equipment

Circuit Board Micro-waste Etching Ammonia Washing Water Precious Metal Regeneration equipment

Copper Recovery Technology and Equipment for PCB Circuit Board
The traditional treatment methods of etching waste liquor for printed circuit boards have some problems, such as backward technology, inconvenient operation, secondary pollution and low benefit. The special extraction electrolysis and adsorption electrolysis technology are adopted in this process, which makes the etching waste liquor recycled. Copper can be recovered by 100%, copper with low copper content wastewater can be recovered by 98%, and the whole system does not produce secondary pollution. The obtained copper is a high purity copper plate. At the same time of pollution control, waste water has been utilized as a resource.
1: Copper etching waste liquid and Micro-etching waste liquid are abundant waste liquid in PCB plant, which not only cause pollution, but also have recycling value. Therefore, while developing PCB production, how to recycle wastewater treatment, recycle waste liquor, reduce pollution and pollution, maximize the reuse of useful resources, reduce pollution emissions, turn waste into treasure, and realize the harmonious development of waste by waste, increase production without pollution, create a harmonious development of human and nature, and take the road of sustainable development, is of great significance to the PCB industry. Of particular importance.
2: Treatment and Utilization of Etching Wastewater at Home and Abroad
Etching waste liquid contains 140-160 g/l of copper. At present, the common practice is to store them in PCB factories and put them in sealed pools or cans waiting for the outside units to pull them away. Outside units are generally qualified companies approved by the local environmental protection department to recycle. They pull back the waste liquor and use chemical methods (neutralization, electrolysis, replacement) to recover copper from the waste liquor or or copper sulphate products. These methods are backward in technology, incomplete recovery of copper, no obvious economic benefits of treatment, and secondary pollution pollutants are discharged. Especially alkaline etching, due to the presence of a large number of ammonia, once improperly treated and discharged, it will inevitably cause a great impact on the water ecosystem.
At present, there are many treatment methods for etching solution and low copper wastewater, one of the main pollutants in PCB production process. These methods not only make use of copper resources, but also have the shortcomings mentioned above. On the basis of summarizing the pros and cons of previous research results and aiming at the characteristics of etching process in PCB production, we efficiently utilize the residual useful components in etching waste liquid, extract the components that affect etching effect, form separation copper, electrolysis copper plate, so as to achieve the purpose of reducing pollution and recovering resources.
Technical Principle: In the process of PCB production, etching process is used to make the copper wall attached to the copper foil plate into the required circuit graphics. High-culvert copper waste liquor which loses etching function is produced by etching waste liquor in the process of etching. The technical scheme is based on adding special extractant to the super-high copper waste etching solution and separating copper selectively, so that the etching waste liquid can recover the etching function and recycle because of the reduction of copper concentration, and the separated copper liquid can be electrolyzed to form high purity copper plate, thus obtaining good economic benefits. The whole process adopts closed-circuit circulating system without secondary pollution and realizes zero emission of pollutants. The operation is also convenient and simple.