Humanity in the process of industrialization, the consumption of mineral resources in a substantial increase, but mineral resources are limited, non-renewable. Therefore, all countries in the world facing a growing shortage of mineral resources problems. The idea of recycling economy solution for this problem to provide the ideas, and mineral resources in the area of great potential for economic development cycle, the cycle of use of mineral resources is economic development and social progress the only way.
Most of the world's renewable metal to metal can be in the form of recycling. Renewable metal can be divided into two categories is a metal products processing factories in the process of cutting down the corners of the particle is, in fact, the new metal refining, we call it the "new particle" and the other is a metal scrap Products (finished product) recovery, we call it the "old material." Refresher new particle can be melted after the direct use of the old material will need dismantling, sorting, with the exception of impurities, melting, after adjusting ingredients used.
Foreign recycled metals, including steel and iron, brass fitting manganese, chromium, cobalt, vanadium, titanium, tungsten, tin, molybdenum, mercury, aluminum, copper, lead, zinc, nickel, magnesium, beryllium, niobium, tantalum, gold, silver, Platinum group metals, cadmium, gallium, indium and selenium and zirconium, there were 30 species.
The world crude steel production of about 40 percent of raw materials from the iron and steel waste recycling, renewable 2004 world aluminum output 7.56 million t, of refined aluminum production and consumption of 25.18 percent and 25.61 percent in 2004, the world's renewable Copper Output of 5.47 million t, of refined copper production and consumption of 35% and 33% of the 2004 World Secondary Lead production 3.27 million t, of refined lead production and consumption of 45% and 46% in 2003 regeneration of the world, Silver, platinum, palladium and other precious metals for the supply of 943 t, 6138t, 19.86t and 14.42 t, respectively, of the 2003 pension, silver, platinum, palladium total supply of 22.77 percent, 21.77 percent, 9.15 percent and 6.08 percent; zinc about renewable Of the world's zinc consumption of about 30 percent.
Industrialized countries renewable metal industry is large in scale, renewable metal recycling rate high. The United States in 2003 iron and steel, chrome, titanium, aluminum, copper, lead, brass fitting zinc, nickel, magnesium metal and the regeneration of its tin can supply 52%, 27%, 46%, 36%, 30%, 80%, 26 %, 44%, 46% and 19% of the value of these renewable metal were: iron and steel 10.5 billion U.S. dollars, 99.2 million U.S. dollars chromium, titanium 48 million U.S. dollars, 4.23 billion U.S. dollars aluminum, copper 1.77 billion U.S. dollars, 1.1 billion U.S. dollars of lead, zinc 309 million U.S. dollars, 899 million U.S. dollars of nickel and magnesium 168 million U.S. dollars.
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