METHOD FOR MANUFACTURING REDUCED IRON

摘要

Provided is a method in which, when manufacturing reduced iron by heating an agglomerate, the yield of the reduced iron is increased and the productivity is improved. A method for manufacturing reduced iron including: a step for agglomerating a mixture containing an iron oxide source, a carbonaceous reducing agent, and a melting point adjustment agent; and a step for heating the resulting agglomerate and reducing and melting the iron oxide in the agglomerate; the agglomerate used being such that the value X calculated according to the formula (1) on the basis of the T.Fe, CaO, SiO2, Al2O3, MgO, and CaF2 contents of the agglomerate is no greater than 370 kg/ton, and the value Y calculated according to the formula (2) on the basis of the CaO, SiO2, and Al2O3 contents of the agglomerate is at least 0.5. In the formulae, items in parentheses represent amounts of respective components contained in the agglomerate (in mass%). X = 1000 × [(CaO) + (SiO2) + (Al2O3) + (MgO) + (CaF2)]/(T.Fe)...(1); Y = (CaO)/[(SiO2) + (Al2O3)]...(2)