Machinery of Precious Metal Recovery from E-waste
Electronic waste, such as discarded circuit boards, computer motherboards, mobile phones, and home appliances, contains significant amounts of precious metals like gold, silver, copper, and palladium. How can these valuable resources be recycled efficiently and environmentally? SUNY GROUP's advanced PCB circuit board recycling and precious metal extraction production line provides an industrial-scale solution for electronic waste regeneration, transforming waste into a sustainable source of profit.
I. Mechanical Pre-processing and Physical Sorting
Electronic waste recycling begins with disassembly and crushing. Large components undergo pre-crushing, while smaller parts proceed directly to shredders or hammer mills for fine grinding, ensuring thorough separation of metals from non-metallic materials like plastics and glass fibers. Ferromagnetic substances (e.g., iron, steel) are then removed via magnetic separation equipment. Electrostatic separators efficiently segregate metals from non-metals based on conductivity differences. This stage achieves preliminary purification of the e-waste, laying the foundation for subsequent precious metal extraction.
II. Smelting and Chemical Extraction
After mechanical sorting, materials enter deeper processing stages. Some industrial systems employ TBRC top-blown rotary furnaces for high-temperature smelting, separating impurities to form base metal alloys. For fine-grained materials containing precious metals, chemical leaching processes employ acidic or cyanide solutions to dissolve gold, silver, and other precious metals from the matrix. Precious metal ions in the solution are then captured via activated carbon adsorption or ion exchange techniques, enabling selective extraction. This stage effectively recovers trace metals from e-waste, enhancing overall recovery rates.
III. Electrolytic Refining and Purification
The final stage involves refining and purifying precious metals. Through electrowinning technology, precious metal ions are deposited onto the cathode surface in an electrolytic cell, forming a high-purity metal layer. Subsequent secondary smelting and chemical refining remove residual impurities, yielding high-purity gold, silver, copper, and other metals. Concurrently, vibrating shaker tables leverage density differences to physically separate metal particles from lightweight impurities, ensuring the entire recovery system achieves industrial-grade precision and purity standards.
This integrated e-waste precious metal recovery line combines mechanical sorting, thermal treatment, chemical leaching, and electrolytic purification. It not only significantly boosts metal recovery rates but also effectively reduces pollution emissions, achieving truly green metallurgy and resource reuse.
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