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 language | English |
|---|---|
| Pages (from-to) | 329-333 |
| Number of pages | 5 |
| Journal | Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science |
| Volume | 45 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2014 Apr |
Fingerprint
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry
Cite this
}
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 journal › Article
TY - JOUR
T1 - Carbon solubility in the CaO-SiO2-3MgO-CaF2 slag system
AU - Park, Jun Yong
AU - Jung, Sung Mo
AU - Sohn, Il
PY - 2014/4
Y1 - 2014/4
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.
UR - http://www.scopus.com/inward/record.url?scp=84899459606&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84899459606&partnerID=8YFLogxK
U2 - 10.1007/s11663-014-0028-9
DO - 10.1007/s11663-014-0028-9
M3 - Article
AN - SCOPUS:84899459606
VL - 45
SP - 329
EP - 333
JO - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
JF - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
SN - 1073-5615
IS - 2
ER -