#Industry ·2026-03-15
At 4 a.m., the dismantling towns in the Pearl River Delta are still brightly lit. Conveyor belts, like a glowing river, continuously deliver waste computers, mobile phones, and base stations into the workshop. In the past, people used acid soaking and fire burning to "extract" copper particles from circuit boards, but left behind thick smoke and acidic wastewater in the villages. Today, a row of milky-white enclosed cabinets stands silently, with only the muffled sound of water indicating that they are in operation. This is the just-commissioned waste circuit board water selection and recovery equipment, like a silent ferryman, transporting electronic waste to its "second life". The heart of the equipment is the "multi-layer turbulent sorting tank". When the crushed circuit board powder is fed into the tank, metals and non-metals of different densities begin to "part ways" under the onslaught of water and bubbles. Copper, tin, and lead, due to their higher specific gravity, sink to the bottom like heavy lead balls; aluminum, plastic, and fiberglass, like light-footed leaves, are gently carried away by the water. The entire process only requires tap water and a small amount of environmentally friendly reagents, with a recycling rate of 96%. The effluent water is flocculated and filtered before being reintroduced into the production line, without any external discharge. Outside the workshop, the pond that had once been stained rusty by acid now reflects the blue sky for the first time. However, the path of technology is not an overnight success. The R&D team remembers that during the first batch of trials, the purity of copper powder always stuck at 85%, and the mixed fiberglass clung to the metals like stubborn glue. To "persuade" them to separate, Chief Engineer Li Zheng moved the laboratory into the factory and stayed by the tank for 72 hours, recording water flow speed, bubble size, temperature, and even workshop humidity. On the third day at midnight, she accidentally lowered the foaming pressure by 0.02 MPa, and the copper powder instantly settled like golden snowflakes, with the purity soaring to 98%. At that moment, she crouched in the corner of the workshop with her notebook, crying louder than when she received her admission notice. The significance of the equipment goes beyond just numbers. Aunt Huang, two kilometers away from the factory, once relied on manual board-smashing to send her daughter to university. The solder fumes she inhaled for years made her cough like a leaky bellows. After the new equipment was put into operation, she became a quality inspector, sampling copper particles daily with white gloves, and her monthly salary doubled. She smiled and said, "Before, we earned 30 cents for smashing one board. Now, let the machine do it for us, and we earn clean money." Further afield, Yunnan Copper recycles the recovered copper into wires for mountainous photovoltaic power stations; a Shenzhen startup company uses gold extraction resin to adsorb precious metals from residual liquids and makes "urban mine" commemorative rings, donating 10 yuan to western recycling stations for each sale. Waste circuit boards are finally no longer scars on the earth, but have been renamed "reverse ores". Of course, the story is far from over. The equipment still needs to overcome challenges such as "low temperature solder separation" and "brominated flame retardant degradation"; the market also faces low-price competition that "drives out good money". But every night, the row of milky-white cabinets lights up with a pale blue indicator, like a quiet sea of stars, reminding people: so-called waste is just resources placed in the wrong place; so-called future lies in the extra meter of recycling water pipes we are willing to walk. Giving new life to electronic waste is not a showcase of technology, but a make-up exam for humanity given by the earth. And the water selection and recovery equipment is slowly unfolding the answer sheet.
2026-03-15
2026-03-15
2026-03-15
2026-03-15
2026-03-15
2026-03-15
No. 15 Industrial Avenue, Industrial Park, Shicheng County, Jiangxi Province
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