en.m.wikipedia.org/wiki/Aluminium_recycling

Aluminium recycling is the process in which secondary commercial aluminium is created from scrap or other forms of end-of-life or otherwise unusable aluminium.[1] It involves re-melting the metal, which is cheaper and more energy-efficient than the production of virgin aluminium by electrolysis of alumina (Al2O3) refined from raw bauxite by use of the Bayer and Hall–Héroult processes.

Recycling scrap aluminium requires only 5% of the energy used to make new aluminium from the raw ore.[2]