Home Contact Dictionary Site info RSS About Sustainability Products Operations Investor Relations Press Career Zinc Copper Lead Gold Silver Sulphur Products Concentrates Aluminium fluoride By-products REACH Material Safety Data Sheets Back Aluminium fluoride Facts Symbol: AlF3 Appearance: Colourless Solid Melting Point: 1291 C Boiling Point: Not applicable Did you know that... This colourless solid can be prepared synthetically but also occurs in nature as the rare mineral rosenbergite. Boliden's production of Aluminium fluoride and synthetic anhydrite Aluminium fluoride and synthetic anhydrite (gypsum) is produced at the Noralf plant at Boliden Odda. The main product is aluminium fluoride (AlF3), which is produced through a process where the raw materials are sulphuric acid (H2SO4), fluorspar (CaF2) and aluminium hydrate (Al(OH)3). The annual production of aluminium fluoride is 40.000 tonnes and of synthetic anhydrite 95.000 tonnes. Aluminium fluoride Aluminium fluoride is primarily used in the production of aluminium. It is a critical additive to the molten electrolyte in aluminium metal production. Using today's technologies, it is impossible to manufacture aluminium without AIF3. Adding AIF3 allows the electrolytic process to take place at a temperature around 850°C, which is considerably lower than the melting point for aluminium oxide (Al2O3, mp ab. 1,500°C). As a result of its temperature-lowering properties, AlF3 has a definite energy saving effect. Synthetic anhydrite (gypsum) Synthetic anhydrite (CaSO4) is a by-product of the aluminium fluoride production. This gypsum differs from "regular" gypsum due to its lack of water and the slower hardening process. Anhydrite, which previously was a waste product, has seen wide use in recent years in Central Europe for fluid floor screed. It is also used as an additive in fertilisers and in cement. Contact us Aluminium Flouride Sales Contact Head Office Boliden Aitik Boliden Bergsöe Boliden Area Boliden Garpenberg Boliden Harjavalta, Smelter Boliden Harjavalta, Copper Refinery Boliden Kokkola Boliden Odda Boliden Rönnskär Boliden Tara Mines Marketing Office - Stockholm Marketing Office - Germany Marketing Office - UK Marketing Office - Denmark Boliden Kylylahti Boliden Group Klarabergsviadukten 90 P.O. Box 44, SE-101 20 Stockholm, Sweden Tel: +46 8 610 15 00 Quick links I want to... Work at Boliden Buy your products Become a supplier About Strategy and goals Policies Corporate Governance Boliden's history Fun facts Presentations Sustainability Social responsibility Environmental responsibility Economic responsibility Business partners Sustainability Reports In focus Products Zinc Copper Lead Gold Silver Sulphur Products Concentrates Aluminium fluoride By-products REACH Material Safety Data Sheets Operations Exploration Mines Smelters Market Expansion projects Investor Relations Financial reports Capital Markets Day 2014 Metals and currencies Boliden in figures Sensitivity analysis Risk management The Boliden share Insiders Subscribe Financial events IR contact Reports and presentations Press Press releases News Films Images Publications Presentations Calendar Career Job Vacancies Working at Boliden Grow with Boliden Well-being Who does what in Boliden? Students Summer Jobs Meet Boliden