Apparatus for producing quality steel directly from iron ores

Details Apparatus for producing quality steel directly from iron ores Apparatus for producing quality steel directly from iron ores

C - Chemistry, Metallurgy

21

C

39/104

C21C 7/072 (2006.01)

Patent

CA 2024237

ABSTRACT OF THE INVENTION The apparatus of the present invention is for producing quality steel directly from iron ores with reducing gas. The apparatus comprises three vessels: (1) a primary reduction vessel, (2) a reducing gas production vessel and (3) a secondary or final reduction vessel. (3) is a high temperature vessel having two hoppers at the top, one into which the partially reduced iron ores are introduced by a conveyor from the bottom of vessel (1), and the other for holding the iron ores and slag ingredients. Molten steel and slag floating on it collect in the bottom where they are held prior to batch withdrawal. Conduits are provided in the wall of vessel (3) (a) to withdraw molten steel and (b) to withdraw molten slag. A plurality of tuyers having arcuate ends are rotatably mounted in the wall above the molten slag layer for introducing (1) oxygen, (11) coke and (iii) reducing gas. By rotating the tuyers, the angle of introduction of the fluid ingredients can be changed to cause them to impinge on the surface of the slag and cause it to rotate clockwise or counterclockwise. The coke and oxygen react to form a reducing gas that rises countercurrent to descending partially reduced iron ores and slag ingredients and flows from the top of the high temperature vessel into the gas production vessel where waste heat is utilized to convert carbonaceous materials, steam and carbon dioxide into hot, strong reducing gas comprising hydrogen and carbon monoxide. Conduits are provided to conduct (1) this gas to (a) the primary and (b) the secondary reduction vessels and (2) sulfur and phosphorus vapors to recovery vessels.

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