Aluminum elements are not available onEarthh, they are created from mineral deposits of Bauxite ore (Al2O3⋅nH2O).
Aluminum foil is produced through 2 stages:
Aluminum production stage
Aluminum is extracted from an ore called Bauxite (the largest concentrated reserves are in the Central Highlands of Vietnam). The ore is refined to create alumina – a type of aluminum oxide (Al2O3). The alumina is then electrolytically reduced to produce aluminum metal.
Bauxite (Al2O3⋅nH2O) --> Alumina (Al2O3) --> Nhôm (Al)
Aluminum foil production stage
Pure aluminum ingots are heated to a very high temperature to become liquid, the liquid aluminum is poured into molds to form aluminum ingots. The aluminum ingot rolls are then passed through a rolling mill, the aluminum is rolled into rolls of aluminum foil of the desired thickness.
Applications of aluminum foil
With outstanding properties such as waterproof, durable, flexible, anti-corrosion, conductive, and especially recyclable, aluminum foil is widely used in:
- Food industry
- Medical and pharmaceutical industry
- Chemical and industrial sector
- Electronic industry
- Construction industry
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