Carbon solubility in the CaO-SiO2-3MgO-CaF2 slag system

Jun Yong Park, Sung Mo Jung, Il Sohn

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The carbon solubility in the CaO-SiO2-3MgO-CaF2 slag system at 1773 K (1500 °C) was investigated under CO/Ar and CO/N2 gases. Higher extended basicity [(CaO + MgO)/SiO2) increased the carbon solubility in the slag as the activity of free oxygen ions ( α02-] promoted the reaction of the free carbide mechanism. Higher CaF2 also resulted in higher carbon dissolution into the slag as fluorine ions interact with the bridged oxygen (O0) in the melt structure to increase the activity of the free oxygen ions in the melt. Structural information obtained from the Fourier transformed infra-red (FT-IR) and Raman revealed a depolymerization of the network structure as the simpler structural units of NBO/Si = 4 increased and the Si-O-Si bending vibrations decreased with higher basicity and CaF 2 content. This correlated well with higher free oxygen ions (O 2-) in the slag system and subsequently higher carbon dissolution. A correlation of the theoretical optical basicity (Ath) with the logarithm of the carbon content in slag showed a relatively similar trend and an increase of carbon was observed with higher optical basicity.

Original languageEnglish
Pages (from-to)329-333
Number of pages5
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume45
Issue number2
DOIs
Publication statusPublished - 2014 Apr

Fingerprint

slags
Slags
Carbon
solubility
Solubility
Alkalinity
carbon
oxygen ions
Ions
Oxygen
Carbon Monoxide
dissolving
Dissolution
depolymerization
Depolymerization
bending vibration
Fluorine
logarithms
carbides
fluorine

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

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abstract = "The carbon solubility in the CaO-SiO2-3MgO-CaF2 slag system at 1773 K (1500 °C) was investigated under CO/Ar and CO/N2 gases. Higher extended basicity [(CaO + MgO)/SiO2) increased the carbon solubility in the slag as the activity of free oxygen ions ( α02-] promoted the reaction of the free carbide mechanism. Higher CaF2 also resulted in higher carbon dissolution into the slag as fluorine ions interact with the bridged oxygen (O0) in the melt structure to increase the activity of the free oxygen ions in the melt. Structural information obtained from the Fourier transformed infra-red (FT-IR) and Raman revealed a depolymerization of the network structure as the simpler structural units of NBO/Si = 4 increased and the Si-O-Si bending vibrations decreased with higher basicity and CaF 2 content. This correlated well with higher free oxygen ions (O 2-) in the slag system and subsequently higher carbon dissolution. A correlation of the theoretical optical basicity (Ath) with the logarithm of the carbon content in slag showed a relatively similar trend and an increase of carbon was observed with higher optical basicity.",
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Carbon solubility in the CaO-SiO2-3MgO-CaF2 slag system. / Park, Jun Yong; Jung, Sung Mo; Sohn, Il.

In: Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science, Vol. 45, No. 2, 04.2014, p. 329-333.

Research output: Contribution to journalArticle

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N2 - The carbon solubility in the CaO-SiO2-3MgO-CaF2 slag system at 1773 K (1500 °C) was investigated under CO/Ar and CO/N2 gases. Higher extended basicity [(CaO + MgO)/SiO2) increased the carbon solubility in the slag as the activity of free oxygen ions ( α02-] promoted the reaction of the free carbide mechanism. Higher CaF2 also resulted in higher carbon dissolution into the slag as fluorine ions interact with the bridged oxygen (O0) in the melt structure to increase the activity of the free oxygen ions in the melt. Structural information obtained from the Fourier transformed infra-red (FT-IR) and Raman revealed a depolymerization of the network structure as the simpler structural units of NBO/Si = 4 increased and the Si-O-Si bending vibrations decreased with higher basicity and CaF 2 content. This correlated well with higher free oxygen ions (O 2-) in the slag system and subsequently higher carbon dissolution. A correlation of the theoretical optical basicity (Ath) with the logarithm of the carbon content in slag showed a relatively similar trend and an increase of carbon was observed with higher optical basicity.

AB - The carbon solubility in the CaO-SiO2-3MgO-CaF2 slag system at 1773 K (1500 °C) was investigated under CO/Ar and CO/N2 gases. Higher extended basicity [(CaO + MgO)/SiO2) increased the carbon solubility in the slag as the activity of free oxygen ions ( α02-] promoted the reaction of the free carbide mechanism. Higher CaF2 also resulted in higher carbon dissolution into the slag as fluorine ions interact with the bridged oxygen (O0) in the melt structure to increase the activity of the free oxygen ions in the melt. Structural information obtained from the Fourier transformed infra-red (FT-IR) and Raman revealed a depolymerization of the network structure as the simpler structural units of NBO/Si = 4 increased and the Si-O-Si bending vibrations decreased with higher basicity and CaF 2 content. This correlated well with higher free oxygen ions (O 2-) in the slag system and subsequently higher carbon dissolution. A correlation of the theoretical optical basicity (Ath) with the logarithm of the carbon content in slag showed a relatively similar trend and an increase of carbon was observed with higher optical basicity.

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