WO2004074549A3 - Aluminium electrowinning cells with metal-based anodes - Google Patents

Aluminium electrowinning cells with metal-based anodes Download PDF

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Publication number
WO2004074549A3
WO2004074549A3 PCT/IB2004/000431 IB2004000431W WO2004074549A3 WO 2004074549 A3 WO2004074549 A3 WO 2004074549A3 IB 2004000431 W IB2004000431 W IB 2004000431W WO 2004074549 A3 WO2004074549 A3 WO 2004074549A3
Authority
WO
WIPO (PCT)
Prior art keywords
weight
anode
fluoride
aluminium
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2004/000431
Other languages
French (fr)
Other versions
WO2004074549A2 (en
Inventor
Nora Vittorio De
Thinh T Nguyen
Jean-Jacques Duruz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Moltech Invent SA
Original Assignee
Moltech Invent SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Moltech Invent SA filed Critical Moltech Invent SA
Priority to NZ540408A priority Critical patent/NZ540408A/en
Priority to CA2505285A priority patent/CA2505285C/en
Priority to EP04712114A priority patent/EP1608798A2/en
Priority to AU2004213650A priority patent/AU2004213650B2/en
Publication of WO2004074549A2 publication Critical patent/WO2004074549A2/en
Publication of WO2004074549A3 publication Critical patent/WO2004074549A3/en
Anticipated expiration legal-status Critical
Priority to NO20054308A priority patent/NO20054308L/en
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/18—Electrolytes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
    • C25C3/12—Anodes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Primary Cells (AREA)

Abstract

A cell for the electrowinning of aluminium comprises a metal-based anode (10) containing at least one of nickel, cobalt and iron. The anode (10) may be covered with an applied or an integral hematite-based layer and/or a cerium oxyfluoride-based outermost coating. The cell contains a fluoride-containing molten electrolyte (5) at a temperature below 950°C, in which the anode (10) is immersed and which consists of: 6.5 to 11 weight% dissolved alumina; 35 to 44 weight% aluminium fluoride; 38 to 46 weight% sodium fluoride; 2 to 15 weight% potassium fluoride; 0 to 5 weight% calcium fluoride; and 0 to 5 weight% in total of one or more further constituents. An anode stem (14b) containing nickel and/or iron can be used to suspend the anode (10) in the electrolyte (5) facing a cathode (21,21A,25) that has an aluminium-wettable surface (20), in particular a drained horizontal or inclined surface.
PCT/IB2004/000431 2003-02-20 2004-02-18 Aluminium electrowinning cells with metal-based anodes Ceased WO2004074549A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NZ540408A NZ540408A (en) 2003-02-20 2004-02-18 Aluminium electrowinning cells with metal-based anodes and a fluoride-containing molten electrolyte
CA2505285A CA2505285C (en) 2003-02-20 2004-02-18 Aluminium electrowinning cells with metal-based anodes
EP04712114A EP1608798A2 (en) 2003-02-20 2004-02-18 Aluminium electrowinning cells with metal-based anodes
AU2004213650A AU2004213650B2 (en) 2003-02-20 2004-02-18 Aluminium electrowinning cells with metal-based anodes
NO20054308A NO20054308L (en) 2003-02-20 2005-09-19 Aluminum electro recovery cells with metal based anodes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IB0300662 2003-02-20
IBPCT/IB03/00662 2003-02-20

Publications (2)

Publication Number Publication Date
WO2004074549A2 WO2004074549A2 (en) 2004-09-02
WO2004074549A3 true WO2004074549A3 (en) 2005-05-12

Family

ID=32894011

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2004/000431 Ceased WO2004074549A2 (en) 2003-02-20 2004-02-18 Aluminium electrowinning cells with metal-based anodes

Country Status (5)

Country Link
EP (1) EP1608798A2 (en)
CA (1) CA2505285C (en)
NO (1) NO20054308L (en)
NZ (1) NZ540408A (en)
WO (1) WO2004074549A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8097144B2 (en) * 2006-03-10 2012-01-17 Rio Tinto Alean International Limited Aluminium electrowinning cell with enhanced crust
BRPI0918222A2 (en) 2008-09-08 2015-12-08 Rio Tinto Alcan Int Ltd metallic oxygen releasing anode operating at high current density for aluminum reducing cells.
CA2917342C (en) * 2013-07-09 2018-05-29 Obshchestvo S Ogranichennoy Otvetstvennost'yu "Obedinennaya Kompaniya Rusal Inzhenerno-Tekhnologicheskiy Tsentr" Electrolyte for obtaining melts using an aluminum electrolyzer
CN104451779B (en) * 2014-12-17 2017-01-18 湖南创元铝业有限公司 Aluminum fluoride control method of aluminum electrolytic cell

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5006209A (en) * 1990-02-13 1991-04-09 Electrochemical Technology Corp. Electrolytic reduction of alumina
US5725744A (en) * 1992-03-24 1998-03-10 Moltech Invent S.A. Cell for the electrolysis of alumina at low temperatures
US6379512B1 (en) * 1998-02-11 2002-04-30 Northwest Aluminum Technology Combination for electrolytic reduction of alumina
WO2004035871A1 (en) * 2002-10-18 2004-04-29 Moltech Invent S.A. Aluminium electrowinning cells with metal-based anodes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5006209A (en) * 1990-02-13 1991-04-09 Electrochemical Technology Corp. Electrolytic reduction of alumina
US5725744A (en) * 1992-03-24 1998-03-10 Moltech Invent S.A. Cell for the electrolysis of alumina at low temperatures
US6379512B1 (en) * 1998-02-11 2002-04-30 Northwest Aluminum Technology Combination for electrolytic reduction of alumina
WO2004035871A1 (en) * 2002-10-18 2004-04-29 Moltech Invent S.A. Aluminium electrowinning cells with metal-based anodes

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
B. PIRIOU ET AL.: "Essais de caractérisation structurale des bains cryolithiques par spectrométrie infrarouge et par hypertrempe", REVUE INTERNATIONALE DES HAUTES TEMPERATURES ET DES REFRACTAIRES, vol. 15, no. 2, 1978, FRANCE, pages 139 - 146, XP009040625 *
DATABASE COMPENDEX [online] ENGINEERING INFORMATION, INC., NEW YORK, NY, US; SEKHAR J A ET AL: "Micropyretically synthesized porous non-consumable anodes in the Ni-Al-Cu-Fe-X system", XP002307620, Database accession no. EIX98154075458 *
LIGHT MET (WARRENDALE PA); LIGHT METALS: PROCEEDINGS OF SESSIONS, TMS ANNUAL MEETING (WARRENDALE, PENNSYLVANIA); LIGHT METALS 1997 MINERALS, METALS & MATERIALS SOC (TMS), WARRENDALE, PA, USA, 1997, pages 347 - 354 *

Also Published As

Publication number Publication date
EP1608798A2 (en) 2005-12-28
NZ540408A (en) 2007-04-27
WO2004074549A2 (en) 2004-09-02
CA2505285A1 (en) 2004-09-02
CA2505285C (en) 2012-07-17
NO20054308L (en) 2005-09-19
AU2004213650A1 (en) 2004-09-02

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