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AssigneeMidrex International B.V. Zurich Branch
InventorsYasuhiro Tanigaki, Osamu Tsuge, Isao Kobayashi, Keisuke Honda, Koji Tokuda, Shoichi Kikuchi, Shuzo Ito
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A method of manufacturing a molten metal iron by charging a starting material at least comprising a carbonaceous reducing material and an iron oxide-containing material into a rotary hearth furnace, reducing under heating the charged starting material into a solid reducing iron, carburizing the metal iron in the solid reduced iron with the carbon ingredient in the carbonaceous reducing material, thereby melting the metal iron, separating the slag ingredient contained in the starting material by the melting, and discharging the molten metal alloy in the molten state as it is to the outside of the rotary hearth furnace for recovery, wherein a downward inclined surface is disposed at an angle 3 to 30° relative to the horizontal plane on the upper surface of a hearth of the rotary hearth furnace on which the starting material is placed, and the molten metal iron is discharged at the discharging position for the molten metal iron from the lowest portion of the inclined surface.
A method of manufacturing a molten metal iron comprising the following steps:
A method of manufacturing a molten metal iron by molding a starting material at least comprising a carbonaceous reducing material and an iron oxide-containing material, charging the molded starting material into a rotary hearth furnace, reducing under heating the charged starting material into a solid reduced iron, carburizing the metal iron in the solid reduced iron with the carbon ingredient in the carbonaceous reducing material, thereby melting the metal iron, separating the slag ingredient contained in the starting material by the melting, and discharging the molten metal iron in the molten state as it is to the outside of the rotary hearth furnace for recovery, wherein a downward inclined surface is disposed at an angle of 3 to 30° relative to the horizontal plane on the upper surface of a hearth of the rotary hearth furnace on which the starting material is placed, and the molten metal iron is discharged at a discharging position for the molten metal iron from the lowest portion of the inclined surface.
Dependencies are inferred from the claim text.