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The present study reports experimental results on the reduction of FeO in molten CaO-SiO 2 -Al 2 O 3 -MgO-FeO slags by solid carbon in an extended-arc plasma reactor. The reduction reaction was found to be controlled by mass transport of FeO in liquid slag. The CO gas generated stirs the bath to establish a convective mass transport system. CO also causes foaming. An analysis using dimensionless numbers provides correlations between the rate constant, k, as well as the foaming index, ⌺, with some properties of the slag such as viscosity, surface tension, and density. A correlation between k and ⌺ is also developed using these parameters for slag characteristics.

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