Method of producing iron oxide pellets

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 1/245 (2006.01) C21B 11/06 (2006.01) C21B 13/00 (2006.01) C21B 13/10 (2006.01) C22B 1/24 (2006.01) C22B 1/243 (2006.01) C22B 1/244 (2006.01) C22B 13/10 (2006.01)

Patent

CA 2251339

A method for producing an iron oxide pellet including the steps of adding water to a raw material mixture comprising iron oxide which serves as a primary component, a carbonaceous material in an amount sufficient for reducing the iron oxide, an organic binder in an amount sufficient for binding the iron oxide and the carbonaceous material, and an inorganic coagulant in an amount of not less than 0.05 mass% and less than 1 mass%; pelletizing the resultant mixture to thereby obtain a green pellet; and drying the green pellet until the moisture content is reduced to equal to or less than 1.0 mass%. The thus-produced iron oxide pellet is charged in a reducing furnace for reduction to thereby obtain a reduced iron pellet.

Divulgation d'une méthode pour produire un granule d'oxyde de fer, comprenant les étapes suivantes : l'addition d'eau à un mélange de matières brutes comprenant de l'oxyde de fer, servant de composé primaire, une matière carbonée en quantité suffisante pour réduire l'oxyde de fer, un liant organique en quantité suffisante pour lier l'oxyde de fer et la matière carbonée, et un coagulant inorganique en quantité supérieure ou égale à 0,05 % et inférieure à 1 %, en poids; l'agglomération du mélange obtenu pour produire un granule vert; et le séchage de ce granule vert jusqu'à ce que sa teneur massique en eau soit réduite à une valeur inférieure ou égale à 1 %. Le granule d'oxyde de fer ainsi produit est placé dans un four de réduction, afin de le réduire et d'obtenir un granule de fer réduit.

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