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US 11,021,766 B2Granted
Direct reduction with coal gasification and coke oven gas
AssigneeMidrex Technologies, Inc.
InventorsHaruyasu Michishita, John Winter
Life of this patent
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Abstract
A method and apparatus for producing direct reduced iron (DRI), including: generating a reducing gas in a coal gasifier using coal, oxygen, steam, and a first coke oven gas (COG) stream as inputs to the coal gasifier; and delivering the reducing gas to a shaft furnace and exposing iron ore agglomerates to the reducing gas to form metallic iron agglomerates. The method further includes delivering a second COG stream directly to the shaft furnace.
Claims11
A method for producing direct reduced iron (DRI), comprising:
- generating a reducing gas in a coal gasifier using coal, oxygen, steam, and a first coke oven gas (COG) stream as inputs to the coal gasifier, wherein the first COG stream is reformed by the coal gasifier and tar and heavy hydrocarbons in the first COG stream are converted to one or more of a reducing gas component and an oxidant in the coal gasifier;
- and
- delivering the reducing gas to a shaft furnace and exposing iron ore agglomerates to the reducing gas to form metallic iron agglomerates.
Dependencies are inferred from the claim text.