EP 1554416 B1 20120201 - ALUMINIUM ELECTROWINNING CELLS WITH METAL-BASED ANODES
Title (en)
ALUMINIUM ELECTROWINNING CELLS WITH METAL-BASED ANODES
Title (de)
ALUMINIUM-ELEKTROGEWINNUNGSZELLEN MIT ANODEN AUF BASIS VON METALLEN
Title (fr)
CELLULES D'EXTRACTION ELECTROLYTIQUE DE L'ALUMINIUM AVEC ANODES A BASE DE METAL
Publication
Application
Priority
- IB 0304649 W 20031017
- IB 0204059 W 20021018
Abstract (en)
[origin: WO2004035871A1] A cell for the electrowinning of aluminium comprises a metal-based anode (10) containing at least one of nickel, cobalt and iron, for example an anode made from an alloy consisting of 50 to 60 weight% in total of nickel and/or cobalt; 25 to 40 weight% iron; 6 to 12 weight% copper; 0.5 to 2 weight% aluminium and/or niobium; and 0.5 to 1.5 weight% in total of further constituents. The anode (10) may have an applied hematite-based coating and optionally a cerium oxyfluoride-based outermost coating. The cell contains a fluoride-containing molten electrolyte (5) at a temperature below 940 DEG C, in which the anode is immersed and which consists of: 5 to 14 weight% dissolved alumina; 35 to 45 weight% aluminium fluoride; 30 to 45 weight% sodium fluoride; 5 to 20 weight% potassium fluoride; 0 to 5 weight% calcium fluoride; and 0 to 5 weight% in total of one or more further constituents. A nickel-containing anode stem (14b) can be used to suspend the anode (10) in the electrolyte facing a cathode (21,21A,25) that has an aluminium-wettable surface (20), in particular a drained horizontal or inclined surface.
IPC 8 full level
C25C 3/18 (2006.01); C25C 3/06 (2006.01); C25C 3/12 (2006.01); C25C 7/02 (2006.01)
CPC (source: EP US)
C25C 3/12 (2013.01 - EP US); C25C 3/125 (2013.01 - EP US); C25C 7/025 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004035871 A1 20040429; AT E543927 T1 20120215; AU 2003269385 A1 20040504; AU 2003269385 B2 20090604; CA 2498622 A1 20040429; CA 2498622 C 20110920; CN 1735717 A 20060215; CN 1735717 B 20111228; EP 1554416 A1 20050720; EP 1554416 B1 20120201; ES 2381927 T3 20120601; NO 20052377 L 20050513; NZ 538777 A 20070223; RU 2005115103 A 20051027; RU 2318924 C2 20080310; SI 1554416 T1 20120531; US 2011031129 A1 20110210
DOCDB simple family (application)
IB 0304649 W 20031017; AT 03751166 T 20031017; AU 2003269385 A 20031017; CA 2498622 A 20031017; CN 200380107076 A 20031017; EP 03751166 A 20031017; ES 03751166 T 20031017; NO 20052377 A 20050513; NZ 53877703 A 20031017; RU 2005115103 A 20031017; SI 200332133 T 20031017; US 53088403 A 20031017