NO954893L - Treatment of burnt carbon anodes for aluminum production - Google Patents

Treatment of burnt carbon anodes for aluminum production

Info

Publication number
NO954893L
NO954893L NO954893A NO954893A NO954893L NO 954893 L NO954893 L NO 954893L NO 954893 A NO954893 A NO 954893A NO 954893 A NO954893 A NO 954893A NO 954893 L NO954893 L NO 954893L
Authority
NO
Norway
Prior art keywords
anode
boron
aluminum production
cell
treatment
Prior art date
Application number
NO954893A
Other languages
Norwegian (no)
Other versions
NO954893D0 (en
Inventor
Fausto Alures Manganiello
Jean-Jacques Duruz
Vittorio Alures Bello
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
Priority claimed from US08/218,679 external-priority patent/US5486278A/en
Application filed by Moltech Invent Sa filed Critical Moltech Invent Sa
Publication of NO954893L publication Critical patent/NO954893L/en
Publication of NO954893D0 publication Critical patent/NO954893D0/en

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
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5006—Boron compounds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
    • 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
    • C25C3/125—Anodes based on carbon

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)

Abstract

En forbrent karbonbasert anode for en elektrolysecelle for produksjon av aluminium, spesielt ved elektrolyse av alumina i en smeltet fluoridelektrolytt, behandles over dens sider og topp for å forbedre deres motstandsdyktighet overfor erosjon under operasjon av cellen på grunn av oksiderende gasser frigjort på anoden, ved neddykking av anoden i en borholdig oppløsning som inneholder 5-60 vekt% H3BO3 eller B2O3 i metanol, etylenglykol, glyserol eller vann med et overflateaktivt stoff, f.eks. ved 80°C til 120°C. Etter 2-60 minutters neddykking er den borholdige oppløsning impregnert til en dybde på 1-10 cm, som regel ca. 2-4 cm, over anodens topp- og sideoverflater som skal beskyttes, under frembringelse av en borkonsentrasjon i den impregnerte overflate fra 200 ppm til 0,35%. Den samme behandling kan anvendes for cellesidevegger.A burned carbon-based anode for an electrolysis cell for aluminum production, especially by electrolysis of alumina in a molten fluoride electrolyte, is treated over its sides and top to improve their resistance to erosion during operation of the cell due to oxidizing gases released at the anode, by immersion of the anode in a boron-containing solution containing 5-60% by weight of H3BO3 or B2O3 in methanol, ethylene glycol, glycerol or water with a surfactant, e.g. at 80 ° C to 120 ° C. After 2-60 minutes immersion, the boron-containing solution is impregnated to a depth of 1-10 cm, usually approx. 2-4 cm, over the top and side surfaces of the anode to be protected, producing a boron concentration in the impregnated surface from 200 ppm to 0.35%. The same treatment can be used for cell side walls.

NO954893A 1993-06-02 1995-12-01 Treatment of burnt carbon anodes for aluminum production NO954893D0 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP93810401 1993-06-02
EP93810545 1993-08-02
US08/218,679 US5486278A (en) 1993-06-02 1994-03-28 Treating prebaked carbon components for aluminum production, the treated components thereof, and the components use in an electrolytic cell
PCT/IB1994/000134 WO1994028200A1 (en) 1993-06-02 1994-06-01 Treating prebaked carbon anodes for aluminium production

Publications (2)

Publication Number Publication Date
NO954893L true NO954893L (en) 1995-12-01
NO954893D0 NO954893D0 (en) 1995-12-01

Family

ID=27235584

Family Applications (1)

Application Number Title Priority Date Filing Date
NO954893A NO954893D0 (en) 1993-06-02 1995-12-01 Treatment of burnt carbon anodes for aluminum production

Country Status (8)

Country Link
AU (1) AU684775B2 (en)
CA (1) CA2161541C (en)
DE (1) DE69410089T2 (en)
NO (1) NO954893D0 (en)
PL (1) PL311881A1 (en)
RU (1) RU2111287C1 (en)
SK (1) SK142095A3 (en)
WO (1) WO1994028200A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5753382A (en) * 1996-01-10 1998-05-19 Moltech Invent S.A. Carbon bodies resistant to deterioration by oxidizing gases
DE69701788T2 (en) * 1996-01-18 2000-11-23 Moltech Invent S.A., Luxemburg/Luxembourg PROTECTION OF POROUS BODIES AGAINST OXIDATION
AU5085698A (en) * 1996-10-18 1998-05-15 Moltech Invent S.A. The start-up of aluminium electrowinning cells
CN102660757B (en) * 2012-05-23 2015-01-21 深圳市新星轻合金材料股份有限公司 Preparation technology for inert anode material or inert cathode coating material for aluminum electrolysis
RU2532200C2 (en) * 2012-07-20 2014-10-27 Анатолий Иванович Киселев Method of obtaining of aluminium by electrolysis of cryolite-aluminuos melt using carbon oxide
RU2570076C1 (en) * 2014-07-31 2015-12-10 Открытое Акционерное Общество "Уральский научно-исследовательский институт композиционных материалов" Method to manufacture items from composite material with carbon-ceramic matrix
US20190390355A1 (en) * 2017-01-12 2019-12-26 UNIVERSITé LAVAL Process For Manufacturing Carbon Anodes For Aluminium Production Cells And Carbon Anodes Obtained From The Same
CN113402299A (en) * 2021-04-27 2021-09-17 北京化工大学 Method for improving friction performance of graphite material and preparation process
CN113388864B (en) * 2021-06-23 2022-08-16 中国铝业股份有限公司 Carbon anode for low-carbon-slag aluminum electrolysis and preparation method thereof
CN114315356B (en) * 2022-01-21 2023-05-26 东北大学 Aluminum electrolysis carbon anode antioxidation coating and preparation method thereof
CN114965879B (en) * 2022-05-12 2023-10-24 中国铝业股份有限公司 Method for determining carbon dioxide emission in aluminum electrolysis process and related equipment
CN115490525B (en) * 2022-10-12 2023-03-14 焦作市凌飞环保科技有限公司 Carbon anode anti-oxidation liquid coating and preparation method thereof
CN116496085A (en) * 2023-04-10 2023-07-28 广西强强碳素股份有限公司 Preparation method of prebaked anode for electrolysis of semi-graphite aluminum

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2042810C3 (en) * 1970-08-28 1975-01-09 Tatabanyai Aluminiumkoho, Tatabanya (Ungarn) Process for reducing the oxidative corrosion of carbon or graphite moldings
AU677777B2 (en) * 1992-04-01 1997-05-08 Moltech Invent S.A. Prevention of oxidation of carbonaceous and other materials at high temperatures

Also Published As

Publication number Publication date
WO1994028200A1 (en) 1994-12-08
RU2111287C1 (en) 1998-05-20
SK142095A3 (en) 1997-05-07
DE69410089D1 (en) 1998-06-10
PL311881A1 (en) 1996-03-18
DE69410089T2 (en) 1998-12-17
AU6657594A (en) 1994-12-20
NO954893D0 (en) 1995-12-01
AU684775B2 (en) 1998-01-08
CA2161541C (en) 1999-09-21

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Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application