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Aluminium (or aluminum in North American English) is a chemical element; it has symbol Al and atomic number 13. Aluminium has a density lower than that of other common metals, about one-third that of steel. It has a great affinity towards oxygen, forming a protective layer of oxide on the surface when exposed to air.
The introduction of these methods for the mass production of aluminium led to extensive use of the light, corrosion-resistant metal in industry and everyday life. Aluminium began to be used in engineering and construction. In World Wars I and II, aluminium was a crucial strategic resource for aviation.
You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
Pure aluminium remained scarce until industrial production began in 1856; since the 1886 discovery of the Hall–Héroult process, production has grown exponentially. Engineering and construction applications began in the first half of the 20th century; aluminium was a vital strategic resource for aviation during both world wars.
In addition, US industry recycled 3.4 million tons of aluminum (so-called secondary production aluminum). [1] Total annual imports of metal and alloy for use in secondary production stood at 2.6 million metric tons in the year to August 2023, with the previous decade seeing a fundamental shift toward recycled production. [2]
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Aluminium smelting is the process of extracting aluminium from its oxide, alumina, generally by the Hall-Héroult process. Alumina is extracted from the ore bauxite by means of the Bayer process at an alumina refinery .