What materials are obtained after dismantling and processing waste circuit boards?

Circuit board dismantling machines are key pieces of equipment for the pre-treatment and resource recovery of electronic waste. Their primary function is to melt the solder on the circuit boards using heat while employing mechanical friction, impact, or brushing actions to efficiently separate electronic components (chips, capacitors, resistors, transistors, etc.) from the substrate (bare board) without damaging them. This enables the secondary sorting and recovery of components and the subsequent metal extraction from the bare boards.

After processing by the pcb dismantling machine, the materials are clearly separated into the following three categories:

1. Waste electronic components (classified by function and recovery value)

Integrated circuits and chips (IC chips, CPUs, memory modules): These contain high concentrations of precious metals such as gold, silver, and palladium, and can be sold directly to precious metal refineries or chip recyclers.

Capacitors (tantalum capacitors, aluminum electrolytic capacitors, SMD capacitors): Tantalum capacitors are rich in the rare metal tantalum; electrolytic capacitors contain high-purity aluminum and copper.

Plugs and connectors: Gold finger slots, USB ports, terminal blocks, etc.; surfaces are often plated with high-purity gold or silver.

Transformers, inductors, and relays: These contain significant amounts of high-purity enameled copper wire and silicon steel sheets.

Heat sinks and metal brackets: High-purity aluminum alloy or pure copper parts; these can be sold directly as scrap metal.

2. Stripped bare circuit boards

Once the components have been removed, the bare boards are free of large pieces of dissimilar metals. They can be fed directly into a circuit board crushing and sorting line (involving shredding followed by air-density or electrostatic separation) to efficiently recover metal powder and resin powder.