Description: History of aluminium. The history of aluminium in human usage goes back at least 2500 years when its compound alum was used for dyeing and city defense. During the Middle Ages alum was traded in international commerce. In the Age of Enlightenment the earth of alum alumina was shown to be an oxide of a new metal which was then discovered in the 1820s. Pure aluminium remained scarce until industrial production began in 1856; since the 1886 discovery of the HallHéroult process production has grown
By sai shankar
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Thursday, June 6, 2019
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