Copper is a non-ferrous metal which is very closely related to human beings. It is widely used in electrical, light industry, machinery manufacturing, construction industry, national defense industry and other fields. It is second only to aluminum in China's consumption of non-ferrous metals. Copper is a kind of red metal, and it is also a kind of green metal. It is said to be a green metal, mainly because its melting point is low, and it is easy to melt and resmelt, so it is quite cheap to recycle. Mainly used for utensils, ancient art and weapons casting, more famous, such as works of art ware and Si Muwu Ding four sheep square statue.
The electrical and electronic market accounts for about 28% of the total. In 1997, the two markets became the second largest end users of copper consumption, with a share of 25%. In many electrical products, such as wires, busbars, transformer windings, heavy motors, telephone lines and telephone cables, the life of copper is quite long. After 20 to 50 years, copper can be recycled. Other copper - containing electrical and electronic products (such as small appliances and consumer electronics) have a shorter service life, usually for 5-10 years. Commercial electronics and large electrical products are usually recycled because they have other precious metals in addition to copper. In spite of this, the recovery rate of small electronic consumer products is still quite low, because there are almost little copper elements in them.