How do you extract the various metals from end-of-life circuit boards?

Author:Suny Group

Circuit boards are substrates made of resin and glass fibre materials, on which a large number of electronic components etc. are constructed. They are mainly used in electronic products such as computers and mobile phones, and in a wider range, in communication, military and aerospace fields. With the continuous development of science and the increasing demand for circuit boards in various fields, there has been a sharp increase in the production of waste circuit boards and edge materials. On the one hand, waste circuit boards in a variety of toxic and harmful substances must be recycled; on the other hand, waste printed circuit board substrates in the heavy metal elements and has a very high resource recycling value, is a potential secondary resources. Therefore, a reasonable and effective recycling of used circuit boards has an important significance for the economy and environmental protection.

Circuit Board Recycling Line

At present, there are three methods of extracting metals from used circuit boards at home and abroad, namely heat treatment technology, wet treatment technology and mechanical treatment technology.

1. Heat treatment technology: Heat treatment technology is to incinerate the waste circuit board in a high-temperature furnace to remove inorganic components such as resin, and then use fire and electrolysis to recover the precious metals in the ash residue. The disadvantages of this method are: during the incineration process a large amount of dioxins, furans and PCBs and other toxic substances are produced in the smoke, there is secondary pollution and health hazards for humans.

Wet treatment technology: Wet metallurgy technology and heat treatment technology are developed on the basis of metal mineral smelting. Compared to heat treatment technology, wet metallurgy technology needs to consume a lot of chemical reagents for metal leaching, although it does not produce a lot of toxic and harmful gases and consumes less energy, but it will produce the phenomenon of wastewater pollution and cause a lot of water waste.

2. Mechanical processing technology: mechanical processing technology refers to the use of Henan Dong Ying circuit board recycling equipment to deal with waste circuit boards, through dry crushing, physical sorting, from the waste circuit boards in the metal copper, aluminum, iron and other metals, metal recovery rate of up to 99% or more.

At present, the more environmentally friendly method of recycling waste circuit boards is to use Henan Dongying circuit board recycling equipment for processing. Through SUNY GROUP circuit board recycling equipment to deal with waste circuit boards is not only environmentally friendly, but also large processing capacity, energy efficient. Is currently a better way to separate used circuit boards!