The reduction of MnO in molten slag with carbon undersaturated iron was studied. It was found that the process is affected by the carbon content of molten metal and the tem- perature. The higher the carbon content and the temperature, the faster both the reduction And the emerging of the hump on curve of ω_FeO, the larger the difference between ω_FeO, max and ωFeO, e. The phenomena were exaplained with three-step reaction model.
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