PCB Board Recycling and Gold Recovery Machinery

PCB recycling and precious metal recovery equipment constitute a comprehensive system designed for the resource recovery of waste printed circuit boards. Through processes such as crushing, sorting, and precious metal extraction, the system efficiently recovers high-value materials—including copper, resin fibers, gold, silver, and palladium—thereby reducing electronic waste pollution while enhancing resource utilization and economic value.

PCB recycling production lines typically feature a modular design, allowing for customized configurations based on raw material types and processing scales. A complete line comprises equipment such as dual-shaft shredders, hammer mills, pulverizing systems, magnetic separators, air classifiers, high-voltage electrostatic separators, pulse dust collection systems, and automatic control systems.

During processing, waste PCBs undergo coarse and fine shredding to reduce particle size to below 5mm. The material then enters a pulverizing system to be ground further to approximately 0.1–0.3mm, ensuring the complete liberation of metals from non-metallic components. Subsequently, magnetic separation removes ferromagnetic impurities, and air classification separates lightweight resin powders. High-voltage electrostatic separation utilizes differences in electrical conductivity to efficiently separate copper and other metals from glass fiber and epoxy resin. Advanced equipment can achieve metal separation purity exceeding 98%; additionally, integrated pulse dust collection systems effectively control dust emissions and enhance workplace safety.

PCB Board Recycling and Gold Recovery Machinery

While standard mechanical PCB sorting primarily recovers base metals like copper, precious metals such as gold, silver, and palladium are concentrated in specific areas like circuit board plating, IC chips, connectors, and CPUs. Specialized precious metal recovery equipment is typically required to extract these high-value materials.

Precious metal recovery processes generally involve multiple stages: pretreatment, incineration or pyrolysis (to remove organic matter), chemical leaching, filtration and purification, metal deposition, and refining. Modern equipment increasingly incorporates automated reagent dosing, enclosed reaction chambers, and exhaust gas purification systems, which not only improve metal recovery efficiency but also reduce chemical consumption and environmental impact. Depending on the specific type of electronic waste, systems for recovering gold or silver, or equipment for the comprehensive recovery of multiple metals, can be selected to achieve high-purity recovery of precious metals such as gold, silver, and palladium, thereby enhancing the value-add of the entire production line.

As the pace of electronic product turnover accelerates and the global volume of discarded PCBs rises, recovery equipment is evolving toward greater automation, intelligence, and environmental sustainability. Modern PCB recovery lines typically employ PLC-based automatic control systems, enabling continuous feeding, real-time monitoring, automated sorting, and centralized dust removal; this minimizes manual intervention and enhances operational stability.

For large-scale electronic waste processing enterprises, combining mechanical sorting with precious metal recovery processes has become the prevailing approach. Mechanical equipment efficiently recovers base metals like copper and aluminum while reducing the costs associated with subsequent precious metal extraction; meanwhile, precious metal recovery systems extract high-value metals, maximizing the resource utilization of the electronic waste. This integrated process not only improves overall recovery rates but also lowers unit processing costs, offering a more stable and efficient solution for the resource recovery of electronic waste.