EP 1448810 B1 20080102 - ALLOY-BASED ANODE STRUCTURES FOR ALUMINIUM PRODUCTION
Title (en)
ALLOY-BASED ANODE STRUCTURES FOR ALUMINIUM PRODUCTION
Title (de)
ANODENSTRUKTUREN AUF DER BASIS VON LEGIERUNGEN FÜR DIE HERSTELLUNG VON ALUMINIUM
Title (fr)
STRUCTURES D'ANODES A BASE D'ALLIAGE POUR LA PRODUCTION D'ALUMINIUM
Publication
Application
Priority
- IB 0202732 W 20020709
- IB 0101275 W 20010713
Abstract (en)
[origin: WO03006716A2] A long-lasting metal-based oxygen-evolving anode (10) for the electrowinning of aluminium from alumina dissolved in a molten electrolyte, has a plurality of electrochemically active anode members (15,15') spaced apart and parallel to one another. Each anode member (15) can comprise a bottom part (15a) which has a substantially constant width over its height and which is extended upwardly by a tapered top part (15b for guiding a circulation of electrolyte (30) thereon. The bottom part (15a) is usually made of a metal alloy with a substantially flat oxide bottom surface (16) which is electrochemically active for the oxidation of oxygen. The metal alloy can comprise an electrically conductive inert structural metal and an active diffusable metal that during electrolysis slowly diffuses to the electrochemically active bottom surface (16) where it is oxidised for maintaining the electrochemically active bottom surface (16) and slowly dissolves into the molten electrolyte (30), in which case the bottom part (15a) forms a long-lasting supply of the active metal diffusable to the electrochemically active bottom surface (16).
IPC 8 full level
C25C 3/12 (2006.01)
CPC (source: EP US)
C25C 3/12 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
WO 03006716 A2 20030123; WO 03006716 A3 20040603; AT E382722 T1 20080115; AU 2002321684 A1 20030129; CA 2450071 A1 20030123; DE 60224436 D1 20080214; EP 1448810 A2 20040825; EP 1448810 B1 20080102; NO 20040143 L 20040113; US 2004231979 A1 20041125
DOCDB simple family (application)
IB 0202732 W 20020709; AT 02755397 T 20020709; AU 2002321684 A 20020709; CA 2450071 A 20020709; DE 60224436 T 20020709; EP 02755397 A 20020709; NO 20040143 A 20040113; US 47931204 A 20040609