Refining method of molten iron and smelting reduction method...

Details Refining method of molten iron and smelting reduction method... Refining method of molten iron and smelting reduction method...

C - Chemistry, Metallurgy

21

C

C21C 1/02 (2006.01) C21B 11/00 (2006.01) C21B 13/14 (2006.01) C21C 5/50 (2006.01) C21C 5/56 (2006.01) C21C 7/00 (2006.01) C21C 7/064 (2006.01) C21C 7/068 (2006.01)

Patent

CA 2315031

A method of smelting a low carbon molten iron comprising the steps of executing desulfurization treatment by supplying a desulfurizer to a molten iron and stirring the molten iron; heating or carburizing the molten iron before or after the desulfurization treatment; and executing decarburization treatment of the molten iron after the desulfurization treatment in a decarbonization furnace. The molten iron is produced by charging an ore reduced to metallization into a melting/reducing furnace. Dust coke, oil coke and waste plastics can be used as the carbon material. A sintered ore having a small particle size can be used as an iron source.

Cette invention concerne un procédé de fusion de fer fondu à faible teneur en carbone, lequel procédé consiste à effectuer un traitement de désulfuration en introduisant un agent désulfurant dans le fer fondu et en remuant ledit fer fondu. On effectue un chauffage ou une carburation du fer fondu avant ou après le traitement de désulfuration. On effectue enfin un traitement de décarburation du fer fondu après le traitement de désulfuration, ceci dans un four de décarbonisation. Le fer fondu est obtenu en chargeant un minerai réduit jusqu'à métallisation dans un four de fusion/réduction. De la poussière de coke, de la coke huileuse et des déchets plastiques peuvent être utilisés comme matériau à base de carbone. Un minerai fritté ayant des particules de petite taille peut être utilisé comme source de fer.

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