Abstract
Experiments were carried out in a system with BOF slags from industrial operations in order to optimize the conditions of recycling BOF slags produced in the steelmaking process. Reduction reactions of FeO and P2O5 proceeded steadily and the FeO reduction rate was almost identical to that of P2O5. The reduction reaction of FeO and P2O5 in BOF slag at the slag/gas interface is the rate‐controlling step. The reaction rates of FeO and P2O5 by dissolved carbon in molten iron are of first order with respect to their respective concentrations. The reduction reactions of FeO and P2O5 by dissolved carbon in iron are much closer to the equilibrium state compared with the reduction by solid carbon. It is necessary to control the portion of phosphorus vaporization during reduction treatment in order to obtain efficient operational conditions for BOF slag reduction.
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