PRODUCTION
OVERVIEW
The Aluminium Oxid Stade GmbH (AOS) alumina refinery was built in the Stade-Bützfleth industrial zone between 1970 - 1973. The plant covers an area of 55 hectares (approx. 133 acres), and boasts an outstanding infrastructure. Production started at the end of 1973.
Our commitment to continuous improvement has allowed AOS to increase the nominal production capacity of 600,000 to over 1 million metric tons of alumina per year by enhancing processes and the infrastructure. These improvements have also significantly reduced emissions.
Aluminium Oxid Stade GmbH is a tolling company, owned by Dadco Alumina and Chemicals Limited. The technology was supplied by the former Vereinigte Aluminium-Werke AG.
Watch the AOS Facility "White Gold" Video
PRODUCTION PROCESS
The production of aluminium trihydrate and aluminium oxide is based on the Bayer Process. Austrian Karl Josef Bayer received patents in 1887 and 1892 for his process to extract aluminium hydroxide from bauxite using caustic soda. The Bayer process has four distinct stages: Digestion, Clarification, Precipitation and Calcination.
QUALITY MANAGEMENT
Our emphasis is on customer satisfaction and improving the organisation's effectiveness, efficiency and profitability.
In 1996, AOS was certified for the first time by GAZ (Company for Accreditation and Certification) in accordance with DIN EN ISO 9001.
The reconfirmation of the certificate took place in July 2006. In addition, an environmental system according to DIN EN ISO 14001 and an occupational safety and health management system according to DIN EN ISO 45001 have been implemented and certified as integrated management.
Furthermore, the energy management system (EnMS) of AOS was certified in December 2012 in accordance with DIN EN ISO 50001. This was done in cooperation with the GUT Certifizierungsgesellschaft für Managementsysteme mbH. The EnMS is an effective tool for lowering the energy consumption and associated CO2-emissions.
A Quality Management delegate has been appointed to co-ordinate the quality function and the management handbook includes quality, environment and safety.
Download our ISO 45001 Certificate
Download our ISO 9001 Certificate
Download our ISO 14001 Certificate
Download our ISO 50001 Certificate