Use of alumina-carbon agglomerates in the carbothermic production of aluminum

US7819937B2 · kind B2 · utility

Assignees

• ALCOA INC. · US
• ELKEM AS · NO

Inventors

• Richard J. Fruehan · Murrysville, US
• David J. Roha · Greensburg, US
• Anders Schei · Kristiansand, NO
• Mark L. Weaver · Washington, US

Key dates

• Filing date: Jan 7, 2010
• Grant date: Oct 26, 2010
• Expiry date: Jan 7, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/3217
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

An agglomerate comprising alumina, carbon, and a binder for use in a vapor recovery reactor of a carbothermic alumina reduction furnace is disclosed. A method for using alumina-carbon agglomerates to capture aluminum vapor species and utilize waste heat from off-gases in a vapor recovery reactor to form a recyclable material is also disclosed.