EP0065534B1 - Cathode pour cellule d'electrolyte fondu pour la preparation d'aluminium - Google Patents

Cathode pour cellule d'electrolyte fondu pour la preparation d'aluminium Download PDF

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Publication number
EP0065534B1
EP0065534B1 EP81903120A EP81903120A EP0065534B1 EP 0065534 B1 EP0065534 B1 EP 0065534B1 EP 81903120 A EP81903120 A EP 81903120A EP 81903120 A EP81903120 A EP 81903120A EP 0065534 B1 EP0065534 B1 EP 0065534B1
Authority
EP
European Patent Office
Prior art keywords
aluminum
solid cathode
elements
cathode according
aluminide
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.)
Expired
Application number
EP81903120A
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German (de)
English (en)
Other versions
EP0065534A1 (fr
Inventor
Tibor Kugler
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.)
Rio Tinto Switzerland AG
Original Assignee
Schweizerische Aluminium AG
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 Schweizerische Aluminium AG filed Critical Schweizerische Aluminium AG
Priority to AT81903120T priority Critical patent/ATE9234T1/de
Publication of EP0065534A1 publication Critical patent/EP0065534A1/fr
Application granted granted Critical
Publication of EP0065534B1 publication Critical patent/EP0065534B1/fr
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    • 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

Definitions

  • the invention relates to an exchangeable wettable solid-state cathode for a melt flow electrolysis cell for the production of aluminum.
  • the electrolysis generally takes place in a temperature range of about 940-970 ° C.
  • the electrolyte becomes poor in aluminum oxide.
  • aluminum oxide in the electrolyte, there is an anode effect, which results in a voltage increase of, for example, 4-4.5 V to 30 V and above.
  • the crust formed from solidified electrolyte material must be hammered in and the aluminum oxide concentration increased by adding new aluminum oxide (alumina).
  • cathodes made of titanium diboride, titanium carbide, pyrolytic graphite, boron carbide and other substances are proposed, mixtures of these substances which, for. B. can be sintered together, are used.
  • the aluminides are present as individual binary compounds or as ternary, quaternary or quinary alloys. Their chemical and thermal resistance allows them to be used in both molten electrolytes and molten aluminum, although they are of limited solubility in the latter. However, this solubility drops sharply with falling temperature.
  • phase diagrams for Ti-Al alloys in the relevant specialist literature show that the melting points of the -y phase are between 1,340 and 1,460 ° C. These relatively low melting points allow the moldings to be produced from the aluminides both by melt metallurgy and by powder metallurgy.
  • the aluminum can be treated with elemental boron, a boron-aluminum alloy or a boron compound, such as, for example, potassium borofluoride, the titanium content of the deposited aluminum being reduced to 0.01% by weight by precipitation of the titanium as titanium diboride can.
  • elemental boron a boron-aluminum alloy or a boron compound, such as, for example, potassium borofluoride
  • the titanium content of the deposited aluminum being reduced to 0.01% by weight by precipitation of the titanium as titanium diboride can.
  • cathode elements can be made from other aluminides and used in aluminum electrolysis:

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  • 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)

Claims (10)

1. Cathode mouillable et échangeable, consistant en un corps solide, pour une cellule d'électrolyse à l'état fondu servant à la fabrication de l'aluminium, caractérisée en ce que la cathode consiste en un aluminiure d'au moins un métal du groupe formé par le titane, le zirconium, le hafnium, le vanadium, le niobium, le tantale, le chrome, le molybdène et le tungstène, sans phase de liaison en aluminium métallique.
2. Cathode consistant en corps solide selon la revendication 1, caractérisée en ce qu'elle consiste en aluminiure de titane de la phase y existant entre TiAI et TiAi3.
3. Cathode en corps solide selon la revendication 1, caractérisée en ce que les composants autres que l'aluminium sont alliés avec les aluminiures en proportions supérieures aux proportions stoechiomé- triques.
4. Cathode en corps solide selon l'une des revendications 1 à 3, caractérisée en ce qu'elle consiste en éléments individuels échangeables, ayant à peu près les mêmes dimensions horizontales que les surfaces utiles des anodes.
5. Cathode en corps solide selon au moins une des revendications 1 à 4, caractérisée en ce que les éléments consistent en éléments inférieurs associés dans des fixations.
6. Cathode en corps solide selon la revendication 5, caractérisée en ce que les fixations des éléments inférieurs consistent en un matériau isolant résistant à l'aluminium fondu.
7. Cathode en corps solide selon la revendication 5, caractérisée en ce que les éléments inférieurs consistent en plaques ou barreaux en disposition verticale.
8. Cathode en corps solide selon la revendication 7, caractérisée en ce que les éléments inférieurs consistent dans la partie supérieure (10, 20) en un aluminiure, alors que la partie inférieure (18, 26) en association mécanique rigide, et qui se trouve exclusivement dans le métal liquide, consiste en un matériau isolant résistant en l'aluminium fondu.
9. Cathode en corps solide selon au moins une des revendications 1 à 8, caractérisée en ce que la surface opératoire de la cathode utilisée est parallèle à celle de l'anode.
10. Cathode en corps solide selon l'une des revendications 1 à 3, caractérisée en ce qu'elle consiste en billes et/ou grenaille d'aluminiure mises en tas sous la table d'anodes.
EP81903120A 1980-11-26 1981-11-16 Cathode pour cellule d'electrolyte fondu pour la preparation d'aluminium Expired EP0065534B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81903120T ATE9234T1 (de) 1980-11-26 1981-11-16 Kathode fuer eine schmelzflusselektrolysezelle zur herstellung von aluminium.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH873780A CH645675A5 (de) 1980-11-26 1980-11-26 Kathode fuer eine schmelzflusselektrolysezelle zur herstellung von aluminium.
CH8737/80 1980-11-26
DE3045349A DE3045349C2 (de) 1980-11-26 1980-12-02 Kathode für eine Schmelzflusselektrolysezelle zur Herstellung von Aluminium

Publications (2)

Publication Number Publication Date
EP0065534A1 EP0065534A1 (fr) 1982-12-01
EP0065534B1 true EP0065534B1 (fr) 1984-09-05

Family

ID=25703715

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81903120A Expired EP0065534B1 (fr) 1980-11-26 1981-11-16 Cathode pour cellule d'electrolyte fondu pour la preparation d'aluminium

Country Status (11)

Country Link
US (1) US4410412A (fr)
EP (1) EP0065534B1 (fr)
JP (1) JPS57501865A (fr)
AU (1) AU546045B2 (fr)
BR (1) BR8108889A (fr)
CA (1) CA1191816A (fr)
CH (1) CH645675A5 (fr)
DE (1) DE3045349C2 (fr)
SU (1) SU1243629A3 (fr)
WO (1) WO1982001899A1 (fr)
ZA (1) ZA818047B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2103246A (en) * 1981-07-01 1983-02-16 Diamond Shamrock Corp Electrolytic production of aluminum
CH654031A5 (de) * 1983-02-10 1986-01-31 Alusuisse Verfahren zur herstellung von festkoerperkathoden.
US5472578A (en) * 1994-09-16 1995-12-05 Moltech Invent S.A. Aluminium production cell and assembly
US8747515B2 (en) * 2003-12-27 2014-06-10 Advance Material Products, Inc Fully-dense discontinuously-reinforced titanium matrix composites and method for manufacturing the same
CN109312484B (zh) * 2016-03-30 2022-02-11 美铝美国公司 用于垂直电解池的装置和系统
WO2020072541A1 (fr) * 2018-10-03 2020-04-09 Alcoa Usa Corp. Systèmes et procédés de production électrolytique d'aluminium
CN115383111B (zh) * 2022-08-26 2023-12-19 山东滨州华创金属有限公司 多组元含能合金材料制备工艺及多组元含能合金材料

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US993002A (en) * 1911-02-28 1911-05-23 Russell & Erwin Mfg Co Double-acting floor-hinge.
US3168394A (en) * 1962-05-10 1965-02-02 Arthur F Johnson Purification of aluminum
US3416917A (en) * 1962-11-13 1968-12-17 Gen Electric Superconductor quaternary alloys with high current capacities and high critical field values
US3391999A (en) * 1964-08-17 1968-07-09 Texaco Inc Preparation of metal aluminides
US4071420A (en) * 1975-12-31 1978-01-31 Aluminum Company Of America Electrolytic production of metal
US4187155A (en) * 1977-03-07 1980-02-05 Diamond Shamrock Technologies S.A. Molten salt electrolysis
CH635132A5 (de) * 1978-07-04 1983-03-15 Alusuisse Kathode fuer einen schmelzflusselektrolyseofen.
US4224128A (en) * 1979-08-17 1980-09-23 Ppg Industries, Inc. Cathode assembly for electrolytic aluminum reduction cell
GB2062862B (en) * 1979-11-08 1984-03-14 Sumitomo Metal Ind Fully automatic ultrasonic flaw detection apparatus
US4239606A (en) * 1979-12-26 1980-12-16 Aluminum Company Of America Production of extreme purity aluminum

Also Published As

Publication number Publication date
DE3045349C2 (de) 1982-12-23
CH645675A5 (de) 1984-10-15
ZA818047B (en) 1982-11-24
JPS57501865A (fr) 1982-10-21
AU7709081A (en) 1982-06-03
DE3045349A1 (de) 1982-07-08
EP0065534A1 (fr) 1982-12-01
SU1243629A3 (ru) 1986-07-07
WO1982001899A1 (fr) 1982-06-10
BR8108889A (pt) 1982-10-26
AU546045B2 (en) 1985-08-15
CA1191816A (fr) 1985-08-13
US4410412A (en) 1983-10-18

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