When an old mobile phone is thrown into the trash, its circuit board might be "crying" silently—containing precious metals like copper and gold, but also carrying toxic substances like lead and mercury. Random disposal is a waste of resources, and simple incineration will release toxic gases. At this point, circuit board recycling equipment acts like magical "miners," extracting valuable resources from the "urban mine" of e-waste. The working process of circuit board recycling equipment is highly intelligent. The first step is "dismantling": smart robotic arms act like dexterous hands, precisely removing capacitors, resistors, and chips; The second step is "crushing": high-speed blades cut the circuit boards into millimeter-sized particles, fully exposing the metals and plastics; The third step is "sorting": magnetic separators remove iron filings, eddy current separators separate non-ferrous metals (copper, aluminum), and electrostatic separators separate plastics from metals using electrical charges. Throughout the process, no chemical reagents are used, preventing toxic leaks. These devices are far more valuable than just environmental protection. Each ton of circuit boards contains 20% copper, 0.1% gold, and rare metals. A single device can "mine" hundreds of tons of copper annually, equivalent to reducing the need for small-scale copper mines. Recycled plastics are turned into industrial materials, achieving a closed-loop recycling system. It transforms e-waste from a "burden" to a "treasure," embodying the essence of a circular economy. In the future, as AI and the Internet of Things integrate into these devices, they will become even more precise and energy-efficient. Circuit board recycling equipment represents humanity's intelligent solution to resource scarcity and pollution, ensuring that the treasures of the "urban mine" are never wasted. (Word count: approximately 580 words)