Evaluation of desulphurization flux in CaO-Al2O 3-BaO-CeO2-MgO system

Etsuro Shibata; Takashi Nakamura; Takeshi Nishida; Mitsunori Endo; Hideyuki Itou; Tomio Takasu

doi:10.1002/srin.200405960

Evaluation of desulphurization flux in CaO-Al₂O ₃-BaO-CeO₂-MgO system

Etsuro Shibata, Takashi Nakamura, Takeshi Nishida, Mitsunori Endo, Hideyuki Itou, Tomio Takasu

IMRAM - Center for Mineral Processing and Metallurgy (CMPM)

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

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Abstract

The flux of the CaO-Al₂O₃-BaO-CeO₂-MgO system as a desulphurization flux containing no fluorine for the secondary metallurgy process was evaluated in this study. The flux composition was designed using the eutectic compositions of the binary systems. The melting and desulphurization abilities of the fluxes were evaluated by measuring their liquidus temperatures and the distribution ratios of sulphur between the fluxes and the carbon-saturated iron or stainless steel. The lowest liquidus temperature of 1325°C was obtained by adding 5.7 mass% MgO to the 80mass%A-20mass%B flux. (A: 12CaO · 7Al₂O₃, B: BaCeO₃+12mass%Al₂O₃). The distribution ratios of sulphur and sulphide capacities of the fluxes in this study were higher than those of the commercial product of calcium aluminate flux. This means that the CaO-Al₂O₃-BaO-CeO₂-MgO fluxes developed in this study have higher desulphurization and melting abilities compared with the commercial product of calcium aluminate flux.

Original language	English
Pages (from-to)	308-313
Number of pages	6
Journal	Steel Research International
Volume	75
Issue number	5
DOIs	https://doi.org/10.1002/srin.200405960
Publication status	Published - 2004 May

Keywords

Desulphurization
Flux
Steelmaking
Sulphide capacity

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abstract = "The flux of the CaO-Al2O3-BaO-CeO2-MgO system as a desulphurization flux containing no fluorine for the secondary metallurgy process was evaluated in this study. The flux composition was designed using the eutectic compositions of the binary systems. The melting and desulphurization abilities of the fluxes were evaluated by measuring their liquidus temperatures and the distribution ratios of sulphur between the fluxes and the carbon-saturated iron or stainless steel. The lowest liquidus temperature of 1325°C was obtained by adding 5.7 mass% MgO to the 80mass%A-20mass%B flux. (A: 12CaO · 7Al2O3, B: BaCeO3+12mass%Al2O3). The distribution ratios of sulphur and sulphide capacities of the fluxes in this study were higher than those of the commercial product of calcium aluminate flux. This means that the CaO-Al2O3-BaO-CeO2-MgO fluxes developed in this study have higher desulphurization and melting abilities compared with the commercial product of calcium aluminate flux.",

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AU - Nishida, Takeshi

AU - Endo, Mitsunori

AU - Itou, Hideyuki

AU - Takasu, Tomio

PY - 2004/5

Y1 - 2004/5

N2 - The flux of the CaO-Al2O3-BaO-CeO2-MgO system as a desulphurization flux containing no fluorine for the secondary metallurgy process was evaluated in this study. The flux composition was designed using the eutectic compositions of the binary systems. The melting and desulphurization abilities of the fluxes were evaluated by measuring their liquidus temperatures and the distribution ratios of sulphur between the fluxes and the carbon-saturated iron or stainless steel. The lowest liquidus temperature of 1325°C was obtained by adding 5.7 mass% MgO to the 80mass%A-20mass%B flux. (A: 12CaO · 7Al2O3, B: BaCeO3+12mass%Al2O3). The distribution ratios of sulphur and sulphide capacities of the fluxes in this study were higher than those of the commercial product of calcium aluminate flux. This means that the CaO-Al2O3-BaO-CeO2-MgO fluxes developed in this study have higher desulphurization and melting abilities compared with the commercial product of calcium aluminate flux.

AB - The flux of the CaO-Al2O3-BaO-CeO2-MgO system as a desulphurization flux containing no fluorine for the secondary metallurgy process was evaluated in this study. The flux composition was designed using the eutectic compositions of the binary systems. The melting and desulphurization abilities of the fluxes were evaluated by measuring their liquidus temperatures and the distribution ratios of sulphur between the fluxes and the carbon-saturated iron or stainless steel. The lowest liquidus temperature of 1325°C was obtained by adding 5.7 mass% MgO to the 80mass%A-20mass%B flux. (A: 12CaO · 7Al2O3, B: BaCeO3+12mass%Al2O3). The distribution ratios of sulphur and sulphide capacities of the fluxes in this study were higher than those of the commercial product of calcium aluminate flux. This means that the CaO-Al2O3-BaO-CeO2-MgO fluxes developed in this study have higher desulphurization and melting abilities compared with the commercial product of calcium aluminate flux.

KW - Desulphurization

KW - Flux

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KW - Sulphide capacity

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Evaluation of desulphurization flux in CaO-Al₂O ₃-BaO-CeO₂-MgO system

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