Aluminum is a light metal, and its compounds are widely dispersed in the natural world. The resources of aluminum in the earth's crust is about 400 to 50 billion tons, second only to oxygen and silicon, and it has the third place. Among the metal types, second only to steel, it is the second largest metal. Aluminum has special chemical and physical properties. It is not only light in weight and strong in texture, but also has excellent ductility, electrical conductivity, thermal conductivity, heat resistance, and nuclear radiation resistance. It is an important basic raw material for the development of the national economy.
Aluminum has a specific gravity of 2.7 and a density of 2.72 g/cm3, about 1/3 of the usual metal. The mechanical properties of industrial pure aluminum are not only related to purity, but also related to the processing conditions of the data. Because of its excellent plasticity and ductility, aluminum is suitable for all kinds of cold and hot press processing. It can be made into aluminum foil with a thickness of only 0.006 mm, and it can also be cold drawn into a very fine wire. After adding other elements, aluminum can also be made into an alloy to harden it, strength can even exceed the structural steel, but still maintain the advantages of light weight.
The production of aluminum ingots is composed of bauxite mining, alumina production, and electrolytic production of aluminum.
Second, aluminum and aluminum commodity classification
1. The production process of electrolytic aluminum: bauxite → alumina → electrolytic aluminum.
2. Divided into three categories according to the main composition of aluminum ingots: High-grade pure aluminum (content of aluminum: 99.93%-99.999%), industrial high-purity aluminum (content of aluminum: 99.85%-99.90%), industrial pure aluminum (aluminum content) 98.0%-99.7%).
3. According to the market shape of aluminum ingot can be divided into three categories: one is processed materials, such as plates, belts, foils, tubes, rods, forgings, powders, etc.; one is forged aluminum alloy, wire rod cable Etc. One type is aluminum products of various types in ordinary days.
Third, the main purpose of aluminum
In the past fifty years, aluminum has become one of the more widely used metals in the world. Especially in these years, aluminum has been used as an environmental protection material for energy saving and consumption reduction, and its use has been further expanded regardless of scale. Especially in the construction, transportation and packaging industries, the aluminum costs of these three occupations usually account for 60% of the total aluminum consumption in the year.
In the construction industry, because of the stability of aluminum in the air and the excellent appearance after anode disposal, aluminum has been widely used in the construction industry, especially in aluminum alloy doors and windows, aluminum plastic pipe, decoration plate, aluminum plate The use of curtain walls and other aspects.
In the transportation industry, in order to reduce the weight of transport itself and reduce the pollution of exhaust emissions to the environment, motorcycles, all kinds of cars, trains, subways, airplanes, ships and other transportation tools begin to use aluminum and aluminum alloys as components and Decoration pieces. As the hardness and strength of aluminum alloy processing materials continue to increase, the share of aerospace applications began to increase year by year.
In the packaging industry, various types of aluminum foils for flexible packaging, all-aluminum cans, various types of caps, lids, and pharmaceutical packaging are also expanding.
In other areas of expenditure, the use of electric and electronic appliances, household appliances (refrigerators, air conditioners), and daily-use hardware has become increasingly widespread.
Pvc Double Coating Fire Hose,Rubber Fire Hose,Double Side Coating Fire Hose,Double Coating Fire Fighting Hose
NANTONG SENTIAN FIRE-FIGHTING EQUIPMENT CO.,LTD. , http://www.firehosefactory.com