In-situ observation of thermal expansion of CaO-A12O3-SiO2 melts

Hyelim Kim; Joonho Lee; Chi Hoon Lee; Won Seung Jo; Ji Hwan Lee

In-situ observation of thermal expansion of CaO-A₁₂O₃-SiO₂ melts

Hyelim Kim, Joonho Lee, Chi Hoon Lee, Won Seung Jo, Ji Hwan Lee

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

CaO-Al₂O₃-SiO₂ slag is one of the most important silicate melts in iron- and steel-making processes, and thermophysical properties of the slag is essential to optimize the iron- and steel-making processes. Owing to the amphoteric nature of Al₂O₃, it is known that many thermophysical properties such as viscosity and thermal conductivity depend on the structure evolution with increasing Al₂O₃ concentration. In this study, the effect of Al₂O₃ concentration on the thermal expansion coefficient of the CaO-Al₂O₃- SiO₂ slag was investigated. The experiment was carried out by using the aerodynamic levitation technique. In order to examine the effect of slag structure on the thermal expansion behavior, structure analysis was carried out separately with Raman spectroscopy. An empirical equation to describe the molar volume of the slag was suggested with respect to temperature and composition, and the relationship between the thermal expansion coefficient and the structure evolution was discussed.

Original language	English
Title of host publication	Proceedings of the 6th International Congress on the Science and Technology of Steelmaking, ICS 2015
Publisher	Chinese Society for Metals
Pages	850-851
Number of pages	2
Publication status	Published - 2015
Event	6th International Congress on the Science and Technology of Steelmaking, ICS 2015 - Beijing, China Duration: 2015 May 12 → 2015 May 14

Other

Other	6th International Congress on the Science and Technology of Steelmaking, ICS 2015
Country/Territory	China
City	Beijing
Period	15/5/12 → 15/5/14

Keywords

Aerodynamic levitation
Density
Raman spectroscopy
Slag structure
Thermal expansion coefficient

ASJC Scopus subject areas

Metals and Alloys

Cite this

@inproceedings{fa2f9d3be6524d7086987c7b527da5fa,

title = "In-situ observation of thermal expansion of CaO-A12O3-SiO2 melts",

abstract = "CaO-Al2O3-SiO2 slag is one of the most important silicate melts in iron- and steel-making processes, and thermophysical properties of the slag is essential to optimize the iron- and steel-making processes. Owing to the amphoteric nature of Al2O3, it is known that many thermophysical properties such as viscosity and thermal conductivity depend on the structure evolution with increasing Al2O3 concentration. In this study, the effect of Al2O3 concentration on the thermal expansion coefficient of the CaO-Al2O3- SiO2 slag was investigated. The experiment was carried out by using the aerodynamic levitation technique. In order to examine the effect of slag structure on the thermal expansion behavior, structure analysis was carried out separately with Raman spectroscopy. An empirical equation to describe the molar volume of the slag was suggested with respect to temperature and composition, and the relationship between the thermal expansion coefficient and the structure evolution was discussed.",

keywords = "Aerodynamic levitation, Density, Raman spectroscopy, Slag structure, Thermal expansion coefficient",

author = "Hyelim Kim and Joonho Lee and Lee, {Chi Hoon} and Jo, {Won Seung} and Lee, {Ji Hwan}",

year = "2015",

language = "English",

pages = "850--851",

booktitle = "Proceedings of the 6th International Congress on the Science and Technology of Steelmaking, ICS 2015",

publisher = "Chinese Society for Metals",

address = "China",

note = "6th International Congress on the Science and Technology of Steelmaking, ICS 2015 ; Conference date: 12-05-2015 Through 14-05-2015",

}

TY - GEN

T1 - In-situ observation of thermal expansion of CaO-A12O3-SiO2 melts

AU - Kim, Hyelim

AU - Lee, Joonho

AU - Lee, Chi Hoon

AU - Jo, Won Seung

AU - Lee, Ji Hwan

PY - 2015

Y1 - 2015

N2 - CaO-Al2O3-SiO2 slag is one of the most important silicate melts in iron- and steel-making processes, and thermophysical properties of the slag is essential to optimize the iron- and steel-making processes. Owing to the amphoteric nature of Al2O3, it is known that many thermophysical properties such as viscosity and thermal conductivity depend on the structure evolution with increasing Al2O3 concentration. In this study, the effect of Al2O3 concentration on the thermal expansion coefficient of the CaO-Al2O3- SiO2 slag was investigated. The experiment was carried out by using the aerodynamic levitation technique. In order to examine the effect of slag structure on the thermal expansion behavior, structure analysis was carried out separately with Raman spectroscopy. An empirical equation to describe the molar volume of the slag was suggested with respect to temperature and composition, and the relationship between the thermal expansion coefficient and the structure evolution was discussed.

AB - CaO-Al2O3-SiO2 slag is one of the most important silicate melts in iron- and steel-making processes, and thermophysical properties of the slag is essential to optimize the iron- and steel-making processes. Owing to the amphoteric nature of Al2O3, it is known that many thermophysical properties such as viscosity and thermal conductivity depend on the structure evolution with increasing Al2O3 concentration. In this study, the effect of Al2O3 concentration on the thermal expansion coefficient of the CaO-Al2O3- SiO2 slag was investigated. The experiment was carried out by using the aerodynamic levitation technique. In order to examine the effect of slag structure on the thermal expansion behavior, structure analysis was carried out separately with Raman spectroscopy. An empirical equation to describe the molar volume of the slag was suggested with respect to temperature and composition, and the relationship between the thermal expansion coefficient and the structure evolution was discussed.

KW - Aerodynamic levitation

KW - Density

KW - Raman spectroscopy

KW - Slag structure

KW - Thermal expansion coefficient

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M3 - Conference contribution

AN - SCOPUS:84983103383

SP - 850

EP - 851

BT - Proceedings of the 6th International Congress on the Science and Technology of Steelmaking, ICS 2015

PB - Chinese Society for Metals

T2 - 6th International Congress on the Science and Technology of Steelmaking, ICS 2015

Y2 - 12 May 2015 through 14 May 2015

ER -