Cathhodes for aluminum electrolysis cell with non-planar slot configuration

US7776191B2 · kind B2 · utility

Assignee

• SGL CARBON SE · DE

Inventors

• Frank Hiltmann · Kriftel, DE
• Philippe Beghein · Cluses, FR

Key dates

• Filing date: Oct 14, 2008
• Grant date: Aug 17, 2010
• Expiry date: Oct 14, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/53204
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Cathodes for aluminum electrolysis cells are formed of cathode blocks and current collector bars attached to those blocks. The cathode block has a cathode slot for receiving the collector bar and has a higher depth at a center than at both lateral edges of the cathode block. Additionally, the collector bar thickness is higher at the center than at both lateral edges of the cathode block. This cathode configuration provides a more even current distribution and, thus, a longer useful lifetime of such cathodes and increases cell productivity.