Method for producing directly reduced iron in a layered furnace

Details Method for producing directly reduced iron in a layered furnace Method for producing directly reduced iron in a layered furnace

C - Chemistry, Metallurgy

21

B

C21B 13/06 (2006.01) C21B 13/10 (2006.01) F27B 9/18 (2006.01)

Patent

CA 2312465

The invention relates to a method for producing reduced iron in a layered furnace comprising several superimposed layers, whereby ore is continually fed into the layered furnace, deposited on the uppermost layer, gradually transferred to the lower layers, and the reducing agent is deposited on the uppermost layer and/or layers thereunder and reacted with the ore in order to form directly reduced iron. The directly reduced iron and reducing agent residues are discharged in the vicinity of the lowest layer of the furnace.

L'invention concerne un procédé permettant de produire du fer directement réduit dans un four à étages qui comporte plusieurs étages superposés. Selon ledit procédé, du minerai est introduit en continu dans le four à étages et déposé sur l'étage le plus haut puis transféré peu à peu aux étages inférieurs, un agent de réduction étant déposé sur l'étage le plus haut, et/ou sur un des étages inférieurs et mis à réagir avec le minerai pour former du fer directement réduit. Le fer directement réduit est extrait, avec les résidus d'agent de réduction, dans la zone de l'étage le plus bas du four.

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