Cristin-resultat-ID: 917369
Sist endret: 20. januar 2015, 14:03
NVI-rapporteringsår: 2012
Resultat
Vitenskapelig artikkel
2012

Cryoscopic Data for Hall-Héroult Bath Containing Magnesium Fluoride, Calcium Fluoride, Potassium Cryolite, and Sodium Chloride

Bidragsytere:
  • Asbjørn Solheim
  • Jannicke Hatlø Kvello og
  • Lisbet Irene Rønne Støen

Tidsskrift

Light Metals
ISSN 0147-0809
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2012
Sider: 763 - 768

Importkilder

Isi-ID: 000324538600131

Beskrivelse Beskrivelse

Tittel

Cryoscopic Data for Hall-Héroult Bath Containing Magnesium Fluoride, Calcium Fluoride, Potassium Cryolite, and Sodium Chloride

Sammendrag

The well-known cryoscopy equation for a binary system was extended to the ternary system NaF-AlF3-B, where B is a substance present in small amounts. It was derived that the depression in the liquidus temperature for a given molar fraction of B depends on how B influences the activity of NaF, as well as on the NaF/AlF3 molar ratio. This implies that it is difficult to estimate the effect on the liquidus temperature of contaminants in the Hall-Héroult bath, and the three-component cryoscopy equation can be regarded as a theoretical justification of the cross-terms used in most empirical equations for calculating the liquidus temperature. New cryoscopic data are given for the system Na3AlF6-CaF2 as well as for some substances that are normally present in only small amounts, and empirical equations containing cross-terms between these substances and aluminium fluoride are suggested.

Bidragsytere

Asbjørn Solheim

  • Tilknyttet:
    Forfatter
    ved SINTEF Industri ved SINTEF AS

Jannicke Hatlø Kvello

  • Tilknyttet:
    Forfatter
    ved Bærekraftig energiteknologi ved SINTEF AS

Lisbet Irene Rønne Støen

  • Tilknyttet:
    Forfatter
    ved Klima og miljø ved SINTEF Ocean
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