Title

Foamy Slag Fundamentals and their Practical Application to Electric Furnace Steelmaking

Foamy Slag Fundamentals and their Practical Application to Electric Furnace Steelmaking

Authorship

PRETORIUS, EUGENE B.; CARLISLE, ROBERT C.; LOPEZ, FRANCISCO

PRETORIUS, EUGENE B.

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CARLISLE, ROBERT C.

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LOPEZ, FRANCISCO

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DOI

10.5151/2594-5327-C00841

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Abstract

This paper will define the slag compositions required to obtain and control optimum foamy slag conditions in the Electric Furnace. In defining the optimal slags, consideration is given to the effects of scrap quality, carbon injection, slag basicity and MgO content. A computer model based on published phase-diagrams has been developed which graphically maps the chemistries for optimal foaming conditions. The model has been applied to steelmaking operations yielding excellent results between the predicted and actual outcomes.

This paper will define the slag compositions required to obtain and control optimum foamy slag conditions in the Electric Furnace. In defining the optimal slags, consideration is given to the effects of scrap quality, carbon injection, slag basicity and MgO content. A computer model based on published phase-diagrams has been developed which graphically maps the chemistries for optimal foaming conditions. The model has been applied to steelmaking operations yielding excellent results between the predicted and actual outcomes.

Keywords

slag foaming, MgO saturation, isothermal stability diagrams, carbon injection, slag basicity

slag foaming, MgO saturation, isothermal stability diagrams, carbon injection, slag basicity