The first five elements in the crust are oxygen, silicon, aluminum, iron, calcium, and aluminum is second only to oxygen and silicon, which exists in large quantities, and is the most metal element in the crust. As the world's largest non -ferrous metal, aluminum is widely used in the fields of construction, packaging, transportation, transportation, power, aerospace and other fields. It is an indispensable basic raw material for national economic construction, strategic emerging industries and national defense technology industries. China is the world's largest aluminum consumer country, accounting for about one -third of the global total consumption. Its downstream consumption is mainly concentrated in buildings, transportation, electricity, machinery and other industries. %.

The industrial chain of aluminum is mainly composed of four links: aluminum ore mining, aluminum refining, raw aluminum production and aluminum processing. The first is aluminum ore mining, and then refine alumina for dissolving, filtering, acidification and burning of aluminum ore, and then prepare electrolytic aluminum by electrolytic melting. After the melting of electrolytic aluminum, it can be further processed into various aluminum, aluminum alloy and aluminum powder.

The aluminum industry chain is continuously extended in the technical upgrade, expanded from the initial simple casting pressure delay to the field of precision processing, and continuously expands the field of aluminum applications. At present Essence The highest -tech aluminum depth processing is high -voltage electronic aluminum foil, and tadpole foil in the field of electronic equipment, automobiles and aviation.

Upstream industry chain

The upstream industrial chain of aluminum includes aluminum ore mining, aluminum aluminum refinement and raw aluminum production.

The global reserves of aluminum ore are rich in countries, mainly concentrated in countries near the equator, including Australia, Guinea, Brazil, Vietnam, and Jamaica, with total reserves accounted for 64%of the world's. my country's reserves account for only 3%of the world's, but the distribution is highly concentrated. The total proportion of four provinces in Guangxi, Henan, Shanxi and Guizhou has reached more than 90%.

As an intermediate link, the output is mainly distributed in China, Australia and Brazil. China imports a large amount of aluminum ore from overseas, and eventually produces alumina. The proportion of aluminum oxide oxide accounted for about 50%. Production needs, only a small amount is required.

Downstream industrial chain

After processing, the original aluminum is made into aluminum processing materials and is used in all walks of life in the lower reaches. Aluminum processing is divided into two forms: deformation processing and casting processing:

(1) Deformation processing: divided into two ways: squeezing and pressure extension. The products made by the squeezing process are called extruded profiles, mainly including architectural profiles and industrial profiles. It mainly includes a variety of aluminum plates, bands, foils.

(2) Casting and processing: The original aluminum is processed into a variety of precision aluminum alloy casting and precision sheet metal through the method of die casting. Aluminum alloy pressure castings are mainly concentrated in the two consumer fields of communication equipment structures and automotive components.