Ways to recover precious metals from waste circuit boards

How to better recycle these wastes called “e-waste” deserves attention. Discarded home appliances contain huge resources. Plastics, precious metals such as gold, silver, copper, aluminum and non-ferrous metals in waste household appliances have huge resource reuse value. At present, my country has entered the peak period of home appliances scrapping, and the entire market scale is as high as tens of billions of yuan. I think a lot of people don’t know much about what to do with discarded circuit boards, or just have a general idea. At present, the recycling and processing of waste circuit boards has become an industry, which has far-reaching significance for social development. Recycling waste circuit boards can reduce resource waste and environmental pollution problems. The equipment and process for treating and recycling waste printed circuit boards by physical methods mainly include the crushing and separation of waste printed circuit boards, and the separation of metals and non-metals by dry and wet separation technology.

At present, the waste circuit boards on the market are mainly circuit boards such as household appliances and computers. Therefore, it can be divided into several categories for recycling. If there are electronic components, first disassemble the electronic components on the circuit board with a disassembly machine, and then further process the disassembled electronic components and the main board. No electronic components can be directly shredded for recycling, in which resin, fiber and copper can be separated to obtain high-grade metals, recycled and sold for profit. The recycling of electronic waste in my country started late and developed rapidly. The electronic information industry has gradually transformed into a green industry that is environmentally friendly and resource-saving. At present, in the “Yangtze River Delta” and “Pearl River Delta”, there are many enterprises mainly engaged in the dismantling of “electronic waste”, forming a veritable circular economy.

Recycling circuit boards can make money. After learning to tell the difference, the spread for recycling boards is also good. Now, the cost of recycling circuit boards ranges from a few yuan to a dozen yuan per kilogram. It is easy to sell for tens or hundreds of dollars after changing hands. Don’t do it if you don’t know anything. It will have a lot of holes, especially with very cheap CPUs sold on the internet. I dare say that 99% of it has been laundered by others, and it will definitely lose money if it is taken back. Some boards look yellow. We think they are made of gold. Some are made of copper. Copper will darken after a long time and some will turn green. Gold does not change color. Colors are gold and yellow. Therefore, in order to make money, we should study carefully and differentiate carefully.