2019 Pittsburgh AISTech

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Slag Engineering for Phosphorus Removal in the EAF and Sulfur Removal in the Ladle (Room 410)

Slag-metal reaction kinetics and thermodynamics are dependent on physical and chemical properties of the slag. During steel refining, the two primary residual elements that are directly impacted by the slag properties are phosphorus and sulfur. EAF slags are suitable for phosphorus removal, and ladle slags are suitable for sulfur removal. In addition, both EAF and ladle slags should be compatible with the refractories. This paper discusses slag properties relevant for efficient dephosphorization and desulfurization during refining in the EAF and ladle. An analysis of a newly developed index for dephosphorization efficiency is also provided.