Turning waste into treasure: A green innovation in the water-based recycling technology for used circuit boards

#Industry ·2026-02-26

In today's era of rapid technological innovation, massive amounts of waste circuit boards have become the "urban mines" of the digital age, containing precious metals but also posing environmental risks. How to efficiently and environmentally friendly separate and extract resources from them has become an important issue in the circular economy. The water-based sorting and recovery equipment for waste circuit boards is an innovative solution to this challenge, achieving a win-win situation of resource recovery and environmental protection through hydraulic sorting technology. The core principle of this equipment is based on gravity sorting. After crushing, circuit board particles are subjected to specific water flow and vibration, resulting in stratification due to the density differences between metals and non-metallic materials. Metal particles sink and accumulate, while non-metallic light materials float and separate. The entire process does not require high-temperature incineration or strong acid leaching, thereby avoiding dioxin emissions and heavy metal pollution at the source. Compared with traditional recycling methods, water sorting technology exhibits three major advantages: First, the sorting purity reaches 98%, greatly improving metal recovery rates; Second, water resources can be recycled, reducing energy consumption by more than 40%; Third, the fully enclosed design ensures zero dust emissions, completely eliminating the pollution risks of traditional crushing processes. On the production line of a certain environmental protection enterprise in Jiangsu, the entire system is operating stably. After being crushed into particles smaller than 25mm by a coarse crusher, the waste boards are separated from iron materials by a magnetic separator before entering a hydraulic cyclone for the separation of copper foil and resin fibers. The final output metal ingots meet the standards for electrolytic copper, while non-metallic materials such as glass fibers become high-quality raw materials for building partitions. The entire production line can process 30,000 tons of waste boards annually, equivalent to extracting 500 kilograms of gold, 2 tons of silver, and 8,000 tons of copper from electronic waste, truly realizing the "transformation of waste into treasure". The environmental benefits of this technology are equally impressive. For every ton of waste circuit boards recovered, 200 tons of primary ore mining can be reduced, saving 15.8 tons of standard coal in energy consumption, and avoiding the discharge of 35 tons of acidic wastewater. The environmentally friendly flocculants added during the water sorting process are biodegradable, and the design of the circulating water tank ensures that the water consumption per ton of material is controlled within 0.3 cubic meters. Behind these data is the equipment manufacturer's profound practice of the concept of "green water and green mountains are as valuable as mountains of gold and silver". Of course, technological innovation never stops. At present, the R&D team is focusing on the upgrade of intelligent sensing systems, using X-ray identification and machine vision technology to achieve accurate identification and sorting of different metals. In the future, combined with Internet of Things technology, a full-process traceability system from the recycling point to the processing center will be built, allowing every circuit board to receive the most environmentally friendly "life cycle". This seemingly cold large-scale equipment actually pulsates with the warmth of green development. It redefines the value of waste with the power of technology, playing the melody of resource recycling in the swirling water flow. When we gaze at the gleaming metal particles emerging from the sorting trough, we see not only the rebirth of scarce resources, but also the intelligent spark of human beings' reconciliation with nature.

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