C - Chemistry – Metallurgy – 21 – B
Patent
C - Chemistry, Metallurgy
21
B
C21B 13/00 (2006.01) B22F 1/00 (2006.01) B22F 8/00 (2006.01) B22F 9/00 (2006.01) C22C 33/02 (2006.01)
Patent
CA 2404607
A method for producing sponge iron wherein iron oxide is reduced through heating together with a solid reducing agent to form sponge iron, characterized in that a mixed powder of a hematite powder and an iron ore powder or a mixed powder of a hematite powder and a mill scale powder is used as the iron oxide, and the hematite powder has a specific surface area of 2.0 m2/g or more and is used in an amount of 5 to 45 mass % based on the total amount of the iron oxide.
L'invention concerne un procédé de production de fer spongieux qui consiste à réduire l'oxyde de fer par chauffage avec un agent de réduction solide pour former du fer spongieux, le procédé se caractérisant en ce qu'un mélange de poudre d'hématite et de poudre de minerais de fer, ou un mélange de poudre d'hématite et de poudre d'écailles de laminage, est utilisé comme oxyde de fer. En outre, la poudre d'hématite, qui présente une aire spécifique d'au moins 2,0 m?2¿/g, est utilisée dans une proportion de 5 à 45 % en masse sur la base de la quantité totale d'oxyde de fer.
Sonobe Akio
Sugihara Hiroshi
Uenosono Satoshi
Jfe Steel Corporation
Kawasaki Steel Corporation
Moffat & Co.
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