Cristin-resultat-ID: 1755294
Sist endret: 19. februar 2020, 15:23
NVI-rapporteringsår: 2019
Resultat
Vitenskapelig artikkel
2019

Thermal conductivity of titanium slags

Bidragsytere:
  • Juhani Heimo
  • Ari Jokilaakso
  • Marko Kekkonen
  • Merete Tangstad og
  • Anne Støre

Tidsskrift

Metallurgical Research and Technology
ISSN 2271-3646
e-ISSN 2271-3654
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2019
Publisert online: 2019
Volum: 116
Hefte: 6
Artikkelnummer: 635

Importkilder

Scopus-ID: 2-s2.0-85075842473

Beskrivelse Beskrivelse

Tittel

Thermal conductivity of titanium slags

Sammendrag

In ilmenite smelting furnaces, a freeze lining of solidified slag is used to protect the furnace refractories against the aggressive titanium slag. Freeze lining thickness cannot be measured directly due to harshness of conditions inside the process, thus process modelling is required. Several parameters influence the thickness of the freeze-lining, one of them being thermal conductivity of the frozen slag. However, there is a lack of thermal conductivity values for high titanium slags −especially as a function of temperature. In this study, thermal conductivity of three titanium slag samples and an additional sample of freeze-lining was measured from room temperature to 1100/1400 °C with the laser flash analysis method. In addition, thermal expansion and microstructures of the samples were studied to provide an extensive understanding of how microstructure will affect thermal conductivity. The thermal conductivity of the slag samples was found to increase from 1.2 to a maximum of 2.4 W/(m K) when increasing temperature from room temperature to 1100 °C. An additional experiment at 1400 °C showed that the thermal conductivity increased further as the temperature increased. The freeze-lining sample behaves differently, with conductivity being the highest at room temperature, 2.2 W/(m K).

Bidragsytere

Juhani Heimo

  • Tilknyttet:
    Forfatter
    ved Aalto-yliopiston teknillinen korkeakoulu

Ari Jokilaakso

  • Tilknyttet:
    Forfatter
    ved Aalto-yliopiston teknillinen korkeakoulu

Marko Kekkonen

  • Tilknyttet:
    Forfatter
    ved Aalto-yliopiston teknillinen korkeakoulu

Merete Tangstad

  • Tilknyttet:
    Forfatter
    ved Institutt for materialteknologi ved Norges teknisk-naturvitenskapelige universitet

Anne Støre

  • Tilknyttet:
    Forfatter
    ved Metallproduksjon og prosessering ved SINTEF AS
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