Thermodynamic Calculations Predicting MgO Saturated EAF Slag for Use in EAF Steel Production

[Peyman 16150]

Thermodynamic Calculations Predicting MgO Saturated EAF Slag for Use in EAF Steel Production

 

Abstract

 

Foamy slags are widely used in EAF steel production because the use of these slags result in energy savings, productivity improvements, and enhanced refractory service life. Foamy slag requiers the control of slag viscosity to sustain gas bubbles during processing. This is accomplished through the precipitation of magnesium w_stite particles in the slag at the operating temperature. A thermodynamic program, Factsage™, was utilized to study the quaternary oxide system of MgO-CaO-FeO-SiO2, to predict the dual (saturated with CaO and MgO) and MgO saturated EAF slag chemistry under different oxygen partial pressures, temperatures, and slag basicity. These predictions indicate a linear relationship between oxide components and slag basicity, from which an accurate prediction of the optimum slag chemistry can be made. The results of the Factsage™ models will be compared to models developed by other researchers and experimental data.

 

 

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