Assessing the Effectiveness of Slag Foaming in Electric-Arc Furnaces

Resumo

The crucial role of foamed slag in improving the effectiveness of the arc-furnace process is beyond any doubt. However, there is no consistent approach to the description of the slag foaming mechanism despite the wide application of this process in modern electric-arc furnaces. Aspects of assessing the effectiveness of slag foaming are considered. A new index characterizing the slag foaming rate is introduced. It allows determining the superficial gas velocity that ensures effective foaming of slag depending on its physical and chemical properties.