A 1:6 torpedo car physical model was built to assess the optimum refining conditions for pigiron desulfurization in the torpedo car considering the industrial parameters used in the steelplant CSBM (Companhia Siderurgica Belgo-Mineira, Jo(a)o Monlevade, MG, Brazil). Therefining practice in this plant is through injection of a CaO-CaF2-Mg powder in the pig ironmelt. Similarity between the model and prototype were established through Froude andturbulent Reynolds criteria. Mixing times were evaluated by pulse tracer addition and thekinetics of metal/slag interactions were assessed from experiments investigating iodine transferfrom kerosene to water. The influence of parameters such as level of metal, gas flow rate, lancepenetration, lance orientation were also evaluated.
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