When old mobile phones gather dust in drawers and old computers are thrown into scrap yards, their core components - circuit boards - are quietly becoming a paradox of environmental hazards and resource treasures. Circuit boards containing heavy metals such as lead and mercury, if discarded indiscriminately, will pollute soil and water sources. However, the precious metals like copper, silver, and gold hidden within them are non-renewable and scarce resources. Circuit board recycling equipment, however, serves as a green bridge connecting "environmental protection" and "resource recycling". The workflow of circuit board recycling equipment is like a precise "resource surgery". The first step is pre-processing disassembly: the equipment uses mechanical arms or manual assistance to remove vulnerable components such as batteries and capacitors from the circuit boards to avoid potential hazards during subsequent crushing. The second step is low-temperature crushing: liquid nitrogen is used to cool the circuit boards to make them brittle, and then they are crushed into micron-sized particles using a crusher. This step not only prevents plastics from melting at high temperatures and generating toxic gases, but also enables more thorough separation of metals from non-metals. The third step is intelligent sorting: heavy and light materials are separated using a gravity sorting machine, iron-based metals are extracted using a magnetic separator, and non-magnetic metals such as copper and aluminum are extracted using an eddy current separator. Finally, non-metallic materials like resins and plastics are classified using an electrostatic separator. The entire process is equipped with dust filtration and exhaust gas purification systems to ensure no secondary pollution. The value of this equipment goes beyond simply "turning waste into treasure". One ton of waste circuit boards can recover approximately 300 kilograms of copper, 2 kilograms of silver, 0.1 kilograms of gold, as well as a large amount of plastics and resins. If these resources are reintroduced into production, it can reduce nearly 80% of mineral extraction and reduce carbon emissions. For example, the intelligent recycling line of a certain environmental protection company has a daily processing capacity of 50 tons and an annual metal recovery value of over 10 million yuan, while reducing the landfill of tens of thousands of tons of electronic waste. Under the "Double Carbon" goal, such equipment has become an essential tool for enterprises to achieve green transformation. Today, circuit board recycling equipment is evolving towards being smarter and more efficient: AI vision recognition technology can accurately sort different types of circuit boards, and the Internet of Things system monitors equipment operation and resource recovery rates in real time. It is not just a machine for processing electronic waste, but also an "invisible hero" driving the circular economy. When we enjoy the convenience of technology, these silently operating devices are enabling "waste" to return to the circular chain of resources, safeguarding the sustainable future of the Earth.