Slag foaming in electric furnace steelmaking

K. Ito; R. J. Fruehan

Slag foaming in electric furnace steelmaking

K. Ito, R. J. Fruehan

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

Abstract

In order to understand the effect of slag composition on foaming in an EAF, slag foaming was quantitatively studied for CaO-SiO₂-FeO slags at temperatures ranging from 1,250 to 1,400°C. It was found that slag foaming could be characterized by a foaming index (Σ) which is equal to the retention or traveling time of the gas in the slag. The effects of P₂O₅, S, MgO and CaF₂ on foaming was studied. As expected, slag foaming increased with increasing viscosity and decreasing surface tension. Suspended second phase solid particles such as CaO, 2CaO-SiO₂ and MgO stabilized the foam and were more important than viscosity and surface tension. Anticipated foaming in the EAF was estimated using experimentally obtained parameter Σ for various operating conditions and slag compositions.

Original language	English
Pages (from-to)	55-60
Number of pages	6
Journal	I & SM
Volume	16
Issue number	8
Publication status	Published - 1989 Aug 1
Externally published	Yes

ASJC Scopus subject areas

Engineering(all)

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abstract = "In order to understand the effect of slag composition on foaming in an EAF, slag foaming was quantitatively studied for CaO-SiO2-FeO slags at temperatures ranging from 1,250 to 1,400°C. It was found that slag foaming could be characterized by a foaming index (Σ) which is equal to the retention or traveling time of the gas in the slag. The effects of P2O5, S, MgO and CaF2 on foaming was studied. As expected, slag foaming increased with increasing viscosity and decreasing surface tension. Suspended second phase solid particles such as CaO, 2CaO-SiO2 and MgO stabilized the foam and were more important than viscosity and surface tension. Anticipated foaming in the EAF was estimated using experimentally obtained parameter Σ for various operating conditions and slag compositions.",

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AB - In order to understand the effect of slag composition on foaming in an EAF, slag foaming was quantitatively studied for CaO-SiO2-FeO slags at temperatures ranging from 1,250 to 1,400°C. It was found that slag foaming could be characterized by a foaming index (Σ) which is equal to the retention or traveling time of the gas in the slag. The effects of P2O5, S, MgO and CaF2 on foaming was studied. As expected, slag foaming increased with increasing viscosity and decreasing surface tension. Suspended second phase solid particles such as CaO, 2CaO-SiO2 and MgO stabilized the foam and were more important than viscosity and surface tension. Anticipated foaming in the EAF was estimated using experimentally obtained parameter Σ for various operating conditions and slag compositions.

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Slag foaming in electric furnace steelmaking

Abstract

ASJC Scopus subject areas

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