Thermal conductivity of titanium slags

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Thermal conductivity of titanium slags. / Heimo, Juhani; Jokilaakso, Ari; Kekkonen, Marko; Tangstad, Merete; Støre, Anne.

julkaisussa: Metallurgical Research and Technology, Vuosikerta 116, Nro 6, 635, 01.01.2019.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Heimo, Juhani ; Jokilaakso, Ari ; Kekkonen, Marko ; Tangstad, Merete ; Støre, Anne. / Thermal conductivity of titanium slags. Julkaisussa: Metallurgical Research and Technology. 2019 ; Vuosikerta 116, Nro 6.

Bibtex - Lataa

@article{dc484f95ae6e4ae68978cada8f81da71,
title = "Thermal conductivity of titanium slags",
abstract = "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).",
keywords = "Freeze lining, Ilmenite smelting, Laser flash analysis",
author = "Juhani Heimo and Ari Jokilaakso and Marko Kekkonen and Merete Tangstad and Anne St{\o}re",
year = "2019",
month = "1",
day = "1",
doi = "10.1051/metal/2019064",
language = "English",
volume = "116",
journal = "Metallurgical Research & Technology",
issn = "2271-3646",
publisher = "EDP SCIENCES",
number = "6",

}

RIS - Lataa

TY - JOUR

T1 - Thermal conductivity of titanium slags

AU - Heimo, Juhani

AU - Jokilaakso, Ari

AU - Kekkonen, Marko

AU - Tangstad, Merete

AU - Støre, Anne

PY - 2019/1/1

Y1 - 2019/1/1

N2 - 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).

AB - 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).

KW - Freeze lining

KW - Ilmenite smelting

KW - Laser flash analysis

UR - http://www.scopus.com/inward/record.url?scp=85075842473&partnerID=8YFLogxK

U2 - 10.1051/metal/2019064

DO - 10.1051/metal/2019064

M3 - Article

VL - 116

JO - Metallurgical Research & Technology

JF - Metallurgical Research & Technology

SN - 2271-3646

IS - 6

M1 - 635

ER -

ID: 39507149