Download center Contact us Global site About aluminium Products Our future Investor relations Careers Press room About Hydro Home Products Bauxite and alumina Alumina Alumina Bauxite and alumina Bauxite Alumina Energy Casthouse products Rolled products Extruded solutions Industries we serve All products Low-carbon aluminium Commercial services Find your sales contacts Our value chain Aluminium oxide Alumina, or aluminium oxide, is the largest single cost in connection with aluminium production. Top quality alumina is required to produce quality metal with low environmental impact. The worldwide production of close to 100 millions tonnes is mainly produced from Bauxite in the Bayer process. Key features Hardness and strength Low heat retention and high melting point Application areas For production of Aluminium by the Hall–Héroult process Other industrial uses include abrasives, fillers in plastics and catalyst support for industrial catalysts Product details To turn bauxite into alumina, we grind the ore and mix it with lime and caustic soda, pump this mix into high-pressure containers, and heat it. The aluminium oxide we’re after is dissolved by the caustic soda, then precipitated out of this solution, washed, and heated to drive off water. What’s left is the sugar-like white powder called alumina, or aluminium oxide (Al2O3). Alumina in the value chain Bauxite Alumina Energy Primary Casting Rolling Extru- sion Products Alumina is refined bauxite and is a raw material for making aluminium The raw material required for the production of primary aluminium is aluminium oxide, or alumina, a white powder refined from bauxite. To produce one tonne of aluminium in an electrolytic reduction process requires approximately two tonnes of alumina. How we can help you Our objective is to establish a close relationship with our clients when it comes to long-term alumina supply including topics such as logistics, quality and R&D. Find your contact Related sites A Hydro no Brasil Where we produce Barcarena, Brazil Updated: October 3, 2016 About Hydro Hydro worldwide The Hydro Way Our history Corporate governance UK Modern Slavery Act Contact Contact us Sales contacts Media contacts Investor relations contacts External links Renew by Hydro Hydro Service Portal Extruded solutions Shapes Follow us Facebook Flickr LinkedIn YouTube Instagram Twitter Facebook (Shapes) Instagram (Shapes) Twitter (Shapes) Privacy Terms and conditions Accessibility Sitemap © 2018 Norsk Hydro ASA We use cookies to provide the best possible experience for you. By closing this message you agree to our use of cookies. To learn more about how we handle and process the personal data we collect on this website, please see our Privacy policy.