Aluminium is the third-most abundant element in the earths crust. There are various different minerals. Bauxite is the most common raw material used to produce alumina for aluminium metal production.
Bauxite deposits are mainly found in a wide belt around the equator. Hydros bauxite mines are located in the state of Pará, in the northernmost part of Brazil. A significant portion of Hydros bauxite is further processed in the companys own plants, but some of it is also sold directly to other companie
The raw material required to produce primary aluminium is aluminium oxide, also called alumina. It is a white powder produced by the refining of bauxite. Some two tonnes of alumina are needed to produce one tonne of aluminium through an electrolytic process. Alumina is also used for a number of other purposes, such as water purification and as an additive in various applications.
Hydro produces alumina at Hydro Alunorte in Brazil, the worlds largest alumina refinery. Some of this is used as a basis for Hydros own aluminium production, but much is sold to other companies.
This hydropower-based aluminium has a maximum carbon footprint of 4.0 kg CO2 per kg aluminium. It is certified by DNV GL according to ISO 14064, covering all carbon emissions from bauxite mining and alumina refining to the production of aluminium in electrolysis and casting.
Hydro 4.0™ is available in all grades and forms from our Norwegian aluminium plants:
Extrusion ingots Foundry alloys Sheet ingots Wire rod