METHOD FOR PRODUCING GRANULAR METALLIC IRON

PROBLEM TO BE SOLVED: To provide a method for producing granular metallic iron with good productivity, even in the case of using a hematite-containing substance as the iron oxide-containing substance, when the granular metallic iron is produced by using a movable hearth type heating and reducing furnace, such as a rotary hearth type, and heating raw material mixture containing iron oxide-containing substance and carbonaceous reducing agent and directly reducing the iron oxide-containing substance in the raw material mixture with the carbonaceous reducing agent. SOLUTION: The hematite-containing substance is used as the iron oxide-containing substance, LiO2content in slag is controlled to be ≥0.05% by blending LiO2-feeding substance in the raw material mixture 2, and a basicity [(CaO+MgO)/SiO2] of the slag obtained from the contents of CaO, MgO and SiO2in the slag may be in the range of 1.5-1.9 by adjusting the quantities of MgO-feeding substance and SiO2-feeding substance. COPYRIGHT: (C)2010,JPO&INPIT