Aluminum is an extremely rich metal element on the earth, and its reserves rank the first among metals. At the end of the 19th century, aluminum came to the fore and became a competitive metal in engineering applications. The development of the three important industries of aviation, construction and automobile requires that the materials have unique properties of aluminum and its alloys, which is greatly conducive to the production and application of this new metal aluminum.

Aluminum (Al) is a light metal, and its compounds are widely distributed in nature. The resources of aluminum in the crust are about 40~50 billion tons, ranking third only after oxygen and silicon. It is the first major metal category among metal varieties. Aluminum has special chemical and physical properties. It is not only light in weight and hard in texture, but also has good ductility, conductivity, thermal conductivity, heat resistance and nuclear radiation resistance. It is an important basic raw material for national economic development.