| 摘要 |
<p><P>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. <P>SOLUTION: The hematite-containing substance is used as the iron oxide-containing substance, LiO<SB>2</SB>content in slag is controlled to be≥0.05% by blending LiO<SB>2</SB>-feeding substance in the raw material mixture 2, and a basicity [(CaO+MgO)/SiO<SB>2</SB>] of the slag obtained from the contents of CaO, MgO and SiO<SB>2</SB>in the slag may be in the range of 1.5-1.9 by adjusting the quantities of MgO-feeding substance and SiO<SB>2</SB>-feeding substance. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
