Aluminium is a silver-white metal obtained from bauxite, a rock composed of more than 50% aluminium hydroxides formed by weathering in tropical regions.
Aluminium is the earth’s third most available element (after oxygen and silicon) and the most abundant metal in the earth’s crust (8% by mass).
Aluminium bearing compounds have been used by man from the earliest times. Pottery was made from clays rich in hydrated silicate of aluminium and at one point in history aluminium was so valuable that rulers and the wealthy preferred cutlery made by aluminium instead of gold.
Today more aluminium is produced each year than all other nonferrous metals combined.
The production of aluminium goes via two different routes: primary aluminium production from ore and recycling aluminium from process scrap and used aluminium products