Thermodynamic Modeling to Improve Foamy Slag Practice in the EAF

Eric Schmidt
Rodrigo Corbari
Michael Kan
Luis Trueba, University of Texas at El Paso


The use of a foamy slag practice in the electric arc furnace has been shown to have several advantages including reduced refractory wear and energy consumption, and a more stable arc. However, maintaining a foamy slag can be difficult, particularly in batch-charge furnaces where continuous feeding of iron units and flux additions are not possible. The improvement in computational thermodynamic databases and computing capabilities now permits a more precise understanding of and design for foaming characteristics in the EAF. In this paper and presentation, efforts to optimize the slag practice in a commercial EAF through computational thermodynamics are presented and preliminary results are reported.