1. Introduction to the basic knowledge of aluminum
Aluminum is a silvery white light metal that is malleable. The product is often formed into a rod shape, a sheet shape, a foil shape, a powder shape, a ribbon shape, and a filament shape. An oxide film that prevents corrosion of metals can be formed in humid air. Aluminum powder and aluminum foil are heated in the air to burn violently and give off a dazzling white flame. Soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solution, difficult to dissolve in water. The relative density is 2.70. The temperature of 660 ° C. The boiling point is 2327 ° C. The content of aluminum in the earth's crust is second only to oxygen and silicon, ranking third, and is the most abundant metal element in the earth's crust.
2, aluminum performance and application
The density of aluminum is small, it is 2.7g/cm3 (one-third of the density of iron and copper), and the ductility is good. The conductivity is two-thirds of that of copper wire, but the quality is only one-third. The price is more than that. It is cheap and is used in large quantities to manufacture high-voltage wires, cables, and the radio industry. Aluminum has good thermal conductivity, corrosion resistance, flammability, decorative properties, and reflectivity. Aluminum can also be used as an additive and a catalyst. The density of pure aluminum is relatively low, but the density and hardness of aluminum alloy are greatly improved. The development of three important industries of aviation, construction and automobile requires that the material properties have the unique properties of aluminum and its alloys, which is greatly beneficial to the production and application of such aluminum metal. At present, aluminum alloy has been widely used in aircraft, automobile, train, ship and other manufacturing industries. Because aluminum is very rich in reserves and has many excellent properties, it also determines the wide application of aluminum in industry and life. Cosmic rockets, space shuttles, and artificial satellites also use a large amount of aluminum and its aluminum alloy.
3. The consumption of aluminum and its proportion
At present, the consumption of aluminum includes construction real estate, electronic power, transportation, durable consumer goods, machinery and equipment, and packaging containers. According to the consumption field, the proportion of each field is mainly in the fields of construction real estate, electronic power, transportation, and durable consumer goods. The application prospects in the field of mechanical equipment are more objective.
4, the application prospects of aluminum metal
At present, there is a market for overcapacity and underutilization in the aluminum industry. In the short term, the prospects for the domestic aluminum industry are difficult to be optimistic. However, due to the abundant reserves of aluminum in the earth's crust and the advantages of other metal elements, aluminum will have extremely broad application prospects in the future. For example, automakers are currently exploring the use of large areas of aluminum alloy instead of steel to make the car lighter. With the advancement of technology, aluminum alloy products will continue to grow rapidly in traditional applications such as aerospace, transportation, electronic power, and construction, and will grow rapidly in new areas.
