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Waste circuit boards are a treasure, recycling is worth paying attention to
Every year in my country, at least 5 million TV sets, 4 million refrigerators, and 6 million washing machines reach the end of life; 8 million tons of waste electronic products need to be processed every year. In addition, as the upgrading of electronic products such as computers, mobile phones, VCDs, and DVDs accelerates, the number of scrapped products will also rise sharply. How to better recycle these waste products called "e-waste" deserves attention. Abandoning home appliances contains huge resources. The plastics and the gold, silver, copper, aluminum and other precious metals and non-ferrous metals contained in waste home appliances have great resource reuse value. my country has now entered the peak period of household appliance scrapping, and the entire market has reached tens of billions of yuan.
At present, the waste circuit boards on the market are mainly home appliances, computers and other circuit boards. Therefore, it can be divided into several categories for recycling. Those with electronic components need to be disassembled manually, and then disassembled and recycled with circuit board recycling equipment; those without electronic components can be directly shredded and recycled.
I think many people don’t know much about the method of disposal of used circuit boards, or they just know a general idea. At present, the recycling of used circuit boards has become an industry, which has far-reaching significance for social development. Recycling waste circuit boards can reduce resource waste, environmental pollution and other issues. The equipment and processes for the physical treatment and recycling of waste printed circuit boards mainly include the crushing and dissociation of waste printed circuit boards, and the separation of metals and non-metals by dry and wet separation techniques.
The study found that when it is crushed to 1.2mm, the waste motherboard can be basically dissociated. The crushed product contains about 6% copper, 18% other metals, and 76% non-metals; copper is mainly distributed in <0.5mm powder, and the metal is mainly In the >0.5mm particle size; the high-frequency air separator can effectively separate non-metals and metals, and it has a wide range of separation particle size, low separation limit, and low operating cost. It is an ideal dry separation.
Circuit board recycling process
The recycling of "e-waste" in my country started late and developed rapidly. In recent years, relevant departments have successively promulgated policies and regulations such as the "Regulations on the Recycling and Disposal of Waste Home Appliances and Electronic Products" and the "Administrative Measures on Pollution Control of Electronic Information Products", which have promoted the gradual transformation of the electronic information industry into an environmentally friendly and resource-saving green industry. At present, in the "Yangtze River Delta" and "Pearl River Delta" regions, there are already many companies whose main business is to dismantle "e-waste", forming a veritable circular economy, which on the one hand solves the employment problem and saves national investment On the other hand, it reduces resource consumption and waste discharge. This "e-waste" recycling model of "cheap renewable resources + cheap second-hand equipment + cheap labor = cheap products" highlights the efficient use of resources and the pursuit of large economic and social benefits with less resource consumption and environmental costs. It is worth paying attention to.
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