Quantification and analysis of slag carryover during liquid steel tapping from BOF vessel

Kamaraj, Ashok and Mandal, Gopi K. and Shanmugam, Sethu P. and et al, . (2022) Quantification and analysis of slag carryover during liquid steel tapping from BOF vessel. Canadian Metallurgical Quarterly, 61 (2). pp. 202-215. ISSN 0008-4433

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Abstract

The amount of slag carryover (SCO) during the liquid steel tapping from the basic oxygen furnace (BOF) vessel has been estimated using a thermodynamic model that ensures the matching the predicted bath silicon with that of experimentally measured silicon in ladle furnace. FactSage 6.4 has been used for thermodynamic analysis. A simple correlation has also been established to estimate SCO immediately after the tapping process using the readily available plant data. Viscosity, interfacial tension of the slag, impurities in the liquid steel, and the tapping temperature has been found to have a profound effect on the amount of SCO. The advantage of the present method of SCO estimation compared to the other methods and the industrially viable control measures for minimising SCO is discussed in light of clean steel practices. Further, industry trials have been conducted to validate the control of SCO by tuning the BOF slag properties. © 2022 Canadian Institute of Mining, Metallurgy and Petroleum.

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IITH Creators:

IITH Creators	ORCiD
Kamaraj, Ashok	UNSPECIFIED

Item Type:

Article

Additional Information:

The authors are thankful to the plant operators working in the steel melting shop of JSW Steel Ltd, Salem, for their kind assistance during data and sample collection to carry out this research activity. The authors are also thankful to Mr. M. Sudhakar (Formerly at M/s. Gerdau Steel India) for conducting the industry trials during June 2018 after attending PTP at CSIR-NML 2017. Author (Ashok Kamaraj) is also thankful to Prof. Seshadri Seetharaman, Distinguished Visiting Professor, Indian Institute of Technology Bombay, for clarifying the complex relationships among the physical properties of the steelmaking slag (via. email conversation) to improve the discussion part of the manuscript.

Uncontrolled Keywords:

FactSage; slag carryover; Steelmaking; tapping

Subjects:

Others > Metallurgy Metallurgical Engineering
Materials Engineering > Materials engineering

Divisions:

Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

23 Jul 2022 11:25

Last Modified:

23 Jul 2022 11:25