Reasons for the generation of waste circuit boards: In today’s electronic age, smart appliances are completely flooded in our lives. Every smart appliance or non-smart appliance is controlled by a circuit board, and each circuit board has its own lifespan, that is, the scrap deadline. Some appliances are directly turned into discarded appliances due to external influences and cannot work. This directly leads to the generation of waste circuit boards.
Hazards of circuit boards: In the world, billions of circuit boards are shipped out of circuit board manufacturers every day. In daily life, there are probably hundreds of millions of tons of waste circuit boards piled up. Once the circuit boards are piled up, they will cause harm to our ecological environment and human health over time. No matter which circuit board, it will cause organic pollution to the society. In addition, the electronic components on the PCBA board will also cause pollution. The main pollution is metal pollution, especially heavy metals such as tin, lead, and cadmium, which directly endanger human health. To be more professional, waste printed circuit boards are a mixture of glass fiber reinforced resin and various metals. They are typical electronic waste. If they are not properly handled and disposed of, they will not only cause a large loss of useful resources, but also contain a large number of teratogenic, mutagenic and carcinogenic substances such as cadmium and brominated flame retardants, which will cause serious harm to the environment and human health. Recycling of waste circuit boards: At present, many regions generally use direct landfill, incineration, water washing and cracking methods, but all of them release toxic substances, which are easy to cause serious secondary pollution of the air or soil. The national environmental protection policy does not allow this or restricts these treatment modes. The method of recycling and treating waste circuit boards promoted internationally is physical method. The remarkable characteristics of this method are small environmental pollution, high comprehensive utilization rate, high added value and other advantages. It is the development trend of electronic waste treatment in the future; its disadvantage is that the treatment cost is slightly higher than the recycling and treatment mode of incineration or water washing. Since waste circuit boards are very tough and mostly in the shape of flat plates, it is difficult to separate metal from non-metal in one crushing. In addition, they contain many types of substances and the separation and decomposition process is complicated. These characteristics determine that the recycling of waste circuit boards is difficult.
