NO994951L - Fremgangsmåte for kontroll av A1F3-innholdet i kryolittsmelter - Google Patents

Fremgangsmåte for kontroll av A1F3-innholdet i kryolittsmelter

Info

Publication number
NO994951L
NO994951L NO994951A NO994951A NO994951L NO 994951 L NO994951 L NO 994951L NO 994951 A NO994951 A NO 994951A NO 994951 A NO994951 A NO 994951A NO 994951 L NO994951 L NO 994951L
Authority
NO
Norway
Prior art keywords
reference value
measured
liquidus temperature
content
temperature
Prior art date
Application number
NO994951A
Other languages
English (en)
Other versions
NO994951D0 (no
Inventor
Paul Clement Verstreken
Original Assignee
Heraeus Electro Nite Int
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 Heraeus Electro Nite Int filed Critical Heraeus Electro Nite Int
Publication of NO994951D0 publication Critical patent/NO994951D0/no
Publication of NO994951L publication Critical patent/NO994951L/no

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
    • C25C3/20—Automatic control or regulation of cells

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Coating With Molten Metal (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

Oppfinnelsen vedrører en fremgangsmåte til kontroll av AlF-innholdet i kryollittsmelter til aluminium-reduksjonen, hvor temperaturen til smeiten måles. For å tilveiebringe en meget nøyaktig fremgangsmåte, som gjør det mulig å utføre aluminium-reduksjonen ved en lavest mulig temperatur, altså mest mulig energibesparende, blir likvidustemperaturen til kryolittsmelten målt og sammenlignet med en første referanseverdi, hvor A1Ftilsettes til badet når den målte likvidustemperaturen er høyere enn den første referanseverdien og hvor den målte likvidustemperaturen sammenlignes med en annen referanseverdi som er lavere enn den første referanseverdien, når den målte likvidustemperaturen er lavere enn den første referanseverdien og hvor NaF eller NaC0tilsettes badet når den målte likvidustemperaturen er lavere enn den andre referanseverdien.
NO994951A 1998-02-12 1999-10-11 Fremgangsmåte for kontroll av A1F3-innholdet i kryolittsmelter NO994951L (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19805619A DE19805619C2 (de) 1998-02-12 1998-02-12 Verfahren zur Regelung des AlF¶3¶-Gehaltes in Kryolithschmelzen
PCT/EP1999/000846 WO1999041432A1 (de) 1998-02-12 1999-02-10 VERFAHREN ZUR REGELUNG DES AlF3-GEHALTES IN KRYOLITHSCHMELZEN

Publications (2)

Publication Number Publication Date
NO994951D0 NO994951D0 (no) 1999-10-11
NO994951L true NO994951L (no) 1999-10-11

Family

ID=7857426

Family Applications (1)

Application Number Title Priority Date Filing Date
NO994951A NO994951L (no) 1998-02-12 1999-10-11 Fremgangsmåte for kontroll av A1F3-innholdet i kryolittsmelter

Country Status (9)

Country Link
US (1) US6183620B1 (no)
CN (1) CN1144900C (no)
AU (1) AU3027399A (no)
BR (1) BR9904777A (no)
CA (1) CA2285992A1 (no)
DE (1) DE19805619C2 (no)
FR (1) FR2774701B1 (no)
NO (1) NO994951L (no)
WO (1) WO1999041432A1 (no)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2821364B1 (fr) 2001-02-28 2004-04-09 Pechiney Aluminium Procede de regulation d'une cellule d'electrolyse
FR2821363B1 (fr) 2001-02-28 2003-04-25 Pechiney Aluminium Procede de regulation d'une cellule d'electrolyse
EP1344847A1 (de) * 2001-12-03 2003-09-17 Alcan Technology & Management AG Regulierung einer Aluminiumelektrolysezelle
US7255783B2 (en) 2003-08-21 2007-08-14 Alcoa Inc. Use of infrared imaging to reduce energy consumption and fluoride consumption
US6942381B2 (en) * 2003-09-25 2005-09-13 Alcoa Inc. Molten cryolitic bath probe
CN101270485B (zh) * 2008-05-10 2010-06-16 中国铝业股份有限公司 电解过热度控制方法
RU2651931C2 (ru) * 2016-06-08 2018-04-24 Общество с ограниченной ответственностью "Объединенная Компания РУСАЛ Инженерно-технологический центр" Способ и устройство для определения состава электролита
AU2021287240A1 (en) * 2020-06-09 2023-01-19 Alcoa Usa Corp. Methods of producing aluminum fluoride from cryolite bath

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2145912C3 (de) * 1970-09-22 1973-10-18 Comalco Ltd., Melbourne, Victoria (Australien) Verfahren zur Herstellung von Aluminium
NO135034B (no) * 1975-04-10 1976-10-18 Norsk Hydro As
DE3564825D1 (en) * 1985-03-18 1988-10-13 Alcan Int Ltd Controlling alf 3 addition to al reduction cell electrolyte
FR2620738B1 (fr) * 1987-09-18 1989-11-24 Pechiney Aluminium Procede de regulation de l'acidite du bain d'electrolyse par recyclage des produits fluores emis par les cuves d'electrolyse hall-heroult
ES2075401T3 (es) * 1990-05-04 1995-10-01 Alusuisse Lonza Services Ag Regulacion y estabilizacion del contenido de alf3 en una celda de electrolisis de aluminio.
DE4433685C2 (de) * 1994-09-21 1997-02-13 Heraeus Electro Nite Int Sensoranordnung zur Temperaturmessung, Temperaturmeßeinrichtung und - verfahren

Also Published As

Publication number Publication date
NO994951D0 (no) 1999-10-11
FR2774701A1 (fr) 1999-08-13
WO1999041432A1 (de) 1999-08-19
AU3027399A (en) 1999-08-30
DE19805619C2 (de) 2002-08-01
FR2774701B1 (fr) 2000-06-23
CN1256721A (zh) 2000-06-14
CA2285992A1 (en) 1999-08-19
DE19805619A1 (de) 1999-09-09
CN1144900C (zh) 2004-04-07
BR9904777A (pt) 2000-03-08
US6183620B1 (en) 2001-02-06

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