APPARATUS AND METHOD FOR INCREASING CARBON CONTENT OF HOT DIRECTLY REDUCED IRON

APPARATUS AND METHOD FOR INCREASING CARBON CONTENT OF HOT DIRECTLY REDUCED IRON

A method of producing a hot, carburized metallized iron product in a generally vertical shaft furnace having an upper reducing zone in which iron oxide reacts with a gaseous reductant, and a lower carbon control and product discharge zone, including: establishing a gravitationally descending iron ox...

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Hauptverfasser: GREGORY DAREL HUGHES, MICHAEL NEAL FREELAND
Format: Patent
Sprache:eng
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CHEMISTRY
MANUFACTURE OF IRON OR STEEL
METALLURGY
METALLURGY OF IRON
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creator GREGORY DAREL HUGHES
MICHAEL NEAL FREELAND
description A method of producing a hot, carburized metallized iron product in a generally vertical shaft furnace having an upper reducing zone in which iron oxide reacts with a gaseous reductant, and a lower carbon control and product discharge zone, including: establishing a gravitationally descending iron oxide burden in the furnace; reacting hot gaseous gaseous reductant with the descending burden to form a metallized iron product and a reacted top gas; and injecting a hydrocarbon gas mixture consisting of hot reformed reducing gas and cool natural gas to the product discharge section of the shaft furnace; whereby the carbon content of the metallized iron pellet product is controlled by mixing the reformed gas and natural gas in the proper ratio to balance the endothermic and exothermic reactions within the discharge zone of the furnace. Apparatus for carrying out the method includes means for controlling the respective amounts of gas introduced to the product discharge zone from the reformer and the source of natural gas.
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subjects CHEMISTRY
MANUFACTURE OF IRON OR STEEL
METALLURGY
METALLURGY OF IRON
title APPARATUS AND METHOD FOR INCREASING CARBON CONTENT OF HOT DIRECTLY REDUCED IRON
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