Printed Circuit Board Gold Extraction Machine
With a large number of obsolete electronic equipment being eliminated, especially the printed circuit board (Printed Circuit Board, referred to as PCB), because it contains gold, silver, copper, and other precious metals and has a high recycling value. Especially gold, although the content in the PCB is not high, because of its excellent conductivity and oxidation resistance, is widely used in circuit contacts and plating. To efficiently and environmentally friendly PCB gold extraction, the related machinery and equipment in the whole recycling process play a crucial role.
PCB recycling is mainly through the “crushing → separation → purification” three core steps. The first step is that the PCB crushing mill will break the whole circuit board into small particles, for the subsequent separation and purification to create conditions. This equipment has a robust structure and can handle many types of electronic boards, ensuring thorough crushing and uniform particles. Next to enter the separation stage, the magnetic separator and gravity separator are used in conjunction, respectively, the use of magnetic differences in materials and the difference in specific gravity, to achieve the effective separation of metals and non-metals. The magnetic separation equipment can first screen out the ferromagnetic materials, while the gravity separation further separates the light non-metals from the heavy metals, improving the purity and efficiency of separation.
To further increase the metal extraction rate, the addition of eddy current separators and electrostatic separators is indispensable. Eddy current separators use a high-speed rotating magnetic field to induce eddy currents in metals, thereby separating non-ferrous metals such as copper and gold from non-metals; while electrostatic separators achieve higher purity separation of metals and non-metals through the different charging capabilities of materials under high-voltage electric fields. These two types of equipment are especially suitable for separating trace precious metals from complex mixtures, enhancing the economic efficiency and resource utilization of the entire recovery process.
Finally, in the purification stage, wet gold extraction equipment plays a key role. This stage usually adopts wet metallurgical processes such as cyanidation or thiourea, in which gold is dissolved from impurities through chemical solutions. Related equipment, such as leaching tanks, reactors, and filtration devices, together constitute a closed, controlled gold extraction system, which can effectively improve the gold recovery rate while reducing the secondary pollution of the environment. Overall, from PCB crushing to metal sorting to wet gold extraction, all kinds of equipment work closely together to build a highly efficient, environmentally friendly, automated electronic waste gold recovery production line, which provides strong support for the realization of e-waste resourcing and minimization.
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