Thermophysical properties of continuous casting mold flox for advanced steel developments

Sung Suk Jung, Gi Hyun Kim, Il Sohn

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The effect of Al2O3 on the crystallization and viscosity of calcium-silicate based fluxes with Na2O and Li 2O additions used for continuous casting mold fluxes have been studied using the confocal laser scanning microscope and the rotating spindle rheometer. Al2O3 additions lowered the crystallization temperature of the flux and several crystalline phases for fluxes with high concentrations of SiO2 forms depending on the cooling rate. High Al2O3 containing fluxes formed relatively few crystalline phases and were not highly dependent on the cooling rate. At slow cooling rates of 25 K/min for 10 and 20 wt% Al2O3 containing samples, SEM images revealed dendrites formed within the crystalline phases. At faster cooling rates the dendrite formation is inhibited and a spherical morphology could be observed. The substitution of SiO2 with Al2O 3 content modified the dominant silicate network into complex alumino-silicates. This increased the viscosity of the melt. FTIR and Raman analysis showed increased amounts of symmetric Al-O0 stretching with higher Al2O3. With higher CaO/(SiO2 + Al 2O3), the symmetric Al-O0 stretching and the Si-O-Al seems to decrease.

Original languageEnglish
Pages (from-to)577-585
Number of pages9
JournalTransactions of the Indian Institute of Metals
Volume66
Issue number5-6
DOIs
Publication statusPublished - 2013 Dec 1

Fingerprint

Steel
Continuous casting
Thermodynamic properties
Fluxes
Cooling
Silicates
Crystallization
Crystalline materials
Stretching
Viscosity
Calcium silicate
Dendrites (metallography)
Rheometers
Complex networks
Microscopes
Substitution reactions
Scanning
Scanning electron microscopy
Lasers
Temperature

All Science Journal Classification (ASJC) codes

  • Metals and Alloys

Cite this

@article{a740de38c75e4650a7155972ff9ef0bd,
title = "Thermophysical properties of continuous casting mold flox for advanced steel developments",
abstract = "The effect of Al2O3 on the crystallization and viscosity of calcium-silicate based fluxes with Na2O and Li 2O additions used for continuous casting mold fluxes have been studied using the confocal laser scanning microscope and the rotating spindle rheometer. Al2O3 additions lowered the crystallization temperature of the flux and several crystalline phases for fluxes with high concentrations of SiO2 forms depending on the cooling rate. High Al2O3 containing fluxes formed relatively few crystalline phases and were not highly dependent on the cooling rate. At slow cooling rates of 25 K/min for 10 and 20 wt{\%} Al2O3 containing samples, SEM images revealed dendrites formed within the crystalline phases. At faster cooling rates the dendrite formation is inhibited and a spherical morphology could be observed. The substitution of SiO2 with Al2O 3 content modified the dominant silicate network into complex alumino-silicates. This increased the viscosity of the melt. FTIR and Raman analysis showed increased amounts of symmetric Al-O0 stretching with higher Al2O3. With higher CaO/(SiO2 + Al 2O3), the symmetric Al-O0 stretching and the Si-O-Al seems to decrease.",
author = "Jung, {Sung Suk} and Kim, {Gi Hyun} and Il Sohn",
year = "2013",
month = "12",
day = "1",
doi = "10.1007/s12666-013-0288-0",
language = "English",
volume = "66",
pages = "577--585",
journal = "Transactions of the Indian Institute of Metals",
issn = "0972-2815",
publisher = "Springer Science + Business Media",
number = "5-6",

}

Thermophysical properties of continuous casting mold flox for advanced steel developments. / Jung, Sung Suk; Kim, Gi Hyun; Sohn, Il.

In: Transactions of the Indian Institute of Metals, Vol. 66, No. 5-6, 01.12.2013, p. 577-585.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Thermophysical properties of continuous casting mold flox for advanced steel developments

AU - Jung, Sung Suk

AU - Kim, Gi Hyun

AU - Sohn, Il

PY - 2013/12/1

Y1 - 2013/12/1

N2 - The effect of Al2O3 on the crystallization and viscosity of calcium-silicate based fluxes with Na2O and Li 2O additions used for continuous casting mold fluxes have been studied using the confocal laser scanning microscope and the rotating spindle rheometer. Al2O3 additions lowered the crystallization temperature of the flux and several crystalline phases for fluxes with high concentrations of SiO2 forms depending on the cooling rate. High Al2O3 containing fluxes formed relatively few crystalline phases and were not highly dependent on the cooling rate. At slow cooling rates of 25 K/min for 10 and 20 wt% Al2O3 containing samples, SEM images revealed dendrites formed within the crystalline phases. At faster cooling rates the dendrite formation is inhibited and a spherical morphology could be observed. The substitution of SiO2 with Al2O 3 content modified the dominant silicate network into complex alumino-silicates. This increased the viscosity of the melt. FTIR and Raman analysis showed increased amounts of symmetric Al-O0 stretching with higher Al2O3. With higher CaO/(SiO2 + Al 2O3), the symmetric Al-O0 stretching and the Si-O-Al seems to decrease.

AB - The effect of Al2O3 on the crystallization and viscosity of calcium-silicate based fluxes with Na2O and Li 2O additions used for continuous casting mold fluxes have been studied using the confocal laser scanning microscope and the rotating spindle rheometer. Al2O3 additions lowered the crystallization temperature of the flux and several crystalline phases for fluxes with high concentrations of SiO2 forms depending on the cooling rate. High Al2O3 containing fluxes formed relatively few crystalline phases and were not highly dependent on the cooling rate. At slow cooling rates of 25 K/min for 10 and 20 wt% Al2O3 containing samples, SEM images revealed dendrites formed within the crystalline phases. At faster cooling rates the dendrite formation is inhibited and a spherical morphology could be observed. The substitution of SiO2 with Al2O 3 content modified the dominant silicate network into complex alumino-silicates. This increased the viscosity of the melt. FTIR and Raman analysis showed increased amounts of symmetric Al-O0 stretching with higher Al2O3. With higher CaO/(SiO2 + Al 2O3), the symmetric Al-O0 stretching and the Si-O-Al seems to decrease.

UR - http://www.scopus.com/inward/record.url?scp=84884816612&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84884816612&partnerID=8YFLogxK

U2 - 10.1007/s12666-013-0288-0

DO - 10.1007/s12666-013-0288-0

M3 - Article

VL - 66

SP - 577

EP - 585

JO - Transactions of the Indian Institute of Metals

JF - Transactions of the Indian Institute of Metals

SN - 0972-2815

IS - 5-6

ER -