Thermodynamic behavior of carbon in molten slags

Joo Hyun Park; Dong Joon Min

doi:10.2355/isijinternational.40.suppl_s96

Thermodynamic behavior of carbon in molten slags

Joo Hyun Park, Dong Joon Min

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The solubility of carbon in the MO-B₂O₃ (MO = CaO, BaO, and Na₂O) and CaO-RO (RO = SiO₂ and Al₂O₃) slags at high temperatures was measured to understand the thermodynamic behavior of carbon in molten slags. The solubility of carbon as a function of the composition of slags shows a minimum value, indicating that carbon dissolves by different mechanisms in the acidic and basic slags, respectively. The infrared spectra measurements indicate that the B-C bond is about 1150 and 1140 cm^-1 in the acidic region of the CaO-B₂O₃ and Na₂O-B₂O₃ slags; hence, the incorporation of carbon into the borate network is confirmed qualitatively. The dissolution of carbon and nitrogen into the slags shows a similar behavior in the B₂O₃-bearing slags, while the different behavior is shown in the CaO-SiO₂ and CaO-Al₂O₃ slags, based on the relationship between carbide capacity and nitride capacity.

Original language	English
Pages (from-to)	S96-S100
Journal	ISIJ International
Volume	40
Issue number	SUPPL.
DOIs	https://doi.org/10.2355/isijinternational.40.suppl_s96
Publication status	Published - 2000

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Thermodynamic behavior of carbon in molten slags",

abstract = "The solubility of carbon in the MO-B2O3 (MO = CaO, BaO, and Na2O) and CaO-RO (RO = SiO2 and Al2O3) slags at high temperatures was measured to understand the thermodynamic behavior of carbon in molten slags. The solubility of carbon as a function of the composition of slags shows a minimum value, indicating that carbon dissolves by different mechanisms in the acidic and basic slags, respectively. The infrared spectra measurements indicate that the B-C bond is about 1150 and 1140 cm-1 in the acidic region of the CaO-B2O3 and Na2O-B2O3 slags; hence, the incorporation of carbon into the borate network is confirmed qualitatively. The dissolution of carbon and nitrogen into the slags shows a similar behavior in the B2O3-bearing slags, while the different behavior is shown in the CaO-SiO2 and CaO-Al2O3 slags, based on the relationship between carbide capacity and nitride capacity.",

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AU - Min, Dong Joon

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AB - The solubility of carbon in the MO-B2O3 (MO = CaO, BaO, and Na2O) and CaO-RO (RO = SiO2 and Al2O3) slags at high temperatures was measured to understand the thermodynamic behavior of carbon in molten slags. The solubility of carbon as a function of the composition of slags shows a minimum value, indicating that carbon dissolves by different mechanisms in the acidic and basic slags, respectively. The infrared spectra measurements indicate that the B-C bond is about 1150 and 1140 cm-1 in the acidic region of the CaO-B2O3 and Na2O-B2O3 slags; hence, the incorporation of carbon into the borate network is confirmed qualitatively. The dissolution of carbon and nitrogen into the slags shows a similar behavior in the B2O3-bearing slags, while the different behavior is shown in the CaO-SiO2 and CaO-Al2O3 slags, based on the relationship between carbide capacity and nitride capacity.

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