METHOD FOR MANUFACTURING SPONGE IRON AND METHOD FOR MANUFACTURING REDUCED IRON POWDER

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing sponge iron having low apparent density and a method for manufacturing reduced iron powder having low apparent density. SOLUTION: As iron oxide powder, 5-45 mass% hematite powder of >=2 m2/g specific surface area and mill scale powder are mixed. The resultant powder mixture is heated together with solid reducing agents to reduce the iron oxide into sponge iron. Then, the sponge iron is pulverized and finish- reduced. It is preferable to regulate the average particle size of the mill scale powder to 30μm to 1 mm.