METHOD FOR TREATING STEELMAKING SLAG AND REFORMED SLAG

摘要

PROBLEM TO BE SOLVED: To obtain fine and highly strong reformed steelmaking slag by enhancing the reducing velocity of such oxides as an iron oxide and P₂O₅ in steelmaking slag based on the suitable regulation of the additional amount of Al₂O₃ in a method for treating the steelmaking slag where the steelmaking slag is treated by melting reforming reduction and reformed slag obtained by the treatment.;SOLUTION: In the method for treating the steelmaking slag where the steelmaking slag is treated by the melting reforming reduction by adding an SiO₂-containing reforming material and the carbon source for reduction while heating the steelmaking slag housed in a reaction vessel in which molten iron is reserved by a heating means, an Al₂O₃-containing material is added so that the concentration of Al₂O₃ in the steelmaking slag is 7 mass% or more and 20 mass% or less through the treatment by the melting reforming reduction and the SiO₂-containing reforming material is added so that the basicity of the steelmaking slag after the treatment by the melting reforming reduction is 0.7 or more.;COPYRIGHT: (C)2011,JPO&INPIT