Patent ID: 9180521
Filing Date: 2015-11-10
Classification: B22F,C21B,F27B,F27D

Abstract:
1. A method for producing a granular metallic iron, which comprises: leveling an adhesion inhibitor fed to a hearth of a reducing melting furnace having a hearth with a moving-bed; feeding an agglomerate including particles of an iron oxide-containing material and a carbonaceous reducing material onto the leveled adhesion inhibitor; leveling the agglomerate fed onto the adhesion inhibitor; subsequently heating the agglomerate to reduce and melt the iron oxide contained in the agglomerate to produce a granular metallic iron; and discharging the produced granular metallic iron using a discharger comprising a screw, wherein the adhesion inhibitor fed to the hearth is evenly leveled using an adhesion inhibitor leveler comprising a screw so that the leveled adhesion inhibitor has a flatness of 40% or less of an average particle diameter of the agglomerate, and wherein the agglomerate fed onto the adhesion inhibitor is evenly laid using an agglomerate leveler comprising a screw, so that the agglomerate forms a single layer of the particles, wherein after or at the same time as the granular metallic iron is discharged and before a fresh adhesion inhibitor is fed to the hearth, a surface layer of the used adhesion inhibitor remaining on the hearth is removed using the discharger comprising a screw so that a residual used adhesion inhibitor remaining on the hearth has a flatness of 40% or less of the average particle diameter of the agglomerate.