PCB Waste management

PCB waste management has becoming a necessary trend encouraged by governments. So what’s the best way for PCB waste management?

Waste PCB contain a large numbers of precious metals and resin, fiber. with a good way for PCB waste management, it will not only bring harm to the environment, but also cause waste of resources. Based on this, DOING company developed a green way for PCB waste management.

First we analysis the material composition of Waste PCB, then we can know what kind and percentage of metals are contained in PCB.

Component of circuit board

Checking the form of material composition, waste PCB contain a large number of Non-metallic materials, such as recyclable metals and plastics, which have high recycling value. Here the base metal, like: Aluminum, Copper, Iron, Nickel, Lead, Tin with higher content; The precious and Rare metals like Au, Ag, Pt, Pd Alloys with lower content, however, it also contains lead, mercury and cadmium heavy metal and brominated flame retardants etc. Harmful substances. If misconduct, it will cause serious pollution to the atmosphere, soil and groundwater.

The integrated handing techniques of PCB waste management: DOING company deal with them in two categories to get highest pure metals, protecting the machine and save cost, resource for our clients.

1. Large and medium-sized Electronic products: Like the PCB waste boards of Televisions, computers, refrigerator which have large area and more of components. DOING PCB waste manage them first by the electric welding and liquefied gas. This way advantage are can complete disassembly with high efficiency.

2. Small Electronic products: Like Electronic toys, Lamps, Sockets, mobile phones, etc. Adopting the method of whole crushing and sorting.

After the whole circuit board is broken, the metal and resin powders are separated by electrostatic separation. Low boiling point metals were separated from metal powders by vacuum distillation, and mixed metal powders containing copper and precious metals were obtained.

Printed circuit board recycling

When we get the resources of copper and precious mixed metals. Here still have a question that how to separate the copper and precious metal mixed. Here DOING company offer one solution:

1. If the market price of Copper is higher and copper sulfate price is low, it can be sent to metal production plant for processing as the product.

2. If the copper sulfate price is high, it can be treated by hydrometallurgy. The route adopted is usually leaching copper before purifying precious metals(Using the way of copper leaching from dilute sulfuric acid, sodium chloride and copper sulfate solution )

The principle of exudation as follow:

The principle of exudation

After evaporation and crystallization to get pure copper sulfate.

After the separation and recovery of copper, the remaining metals are mainly precious metals (such as gold, silver, platinum, palladium, etc.). The remaining metals are mainly precious metals (such as gold, silver, platinum, palladium, etc.), which can be recycled by using the existing wet process.

The Non-metals in the PCB waste board are mostly organic plastics and fiber resins. The organic plastics can be sold directly as products to plastic recycling manufacturers after crushing and sorting. Also can mix thermoplastic with sawdust, and add additives, then after hot-press to get plastic wood products.

At last, DOING company for PCB Waste management basis on the characteristics of circuit boards and the status of industrialization technology, DOING company proposed a tailor-made PCB Waste management for the overall recycling of waste circuit boards, and Giving the solutions for the deep processing of metal and Non-metal resources. DOING company PCB waste management provides a reasonable comprehensive recycling scheme for PCB waste circuit boards.

PCB recycling machine

Any more details you want to understand, please give DOING Group inquiry by any time.