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US 12,686,893 B2Granted
Direct reduced iron system and method
AssigneeNucor Corporation
InventorsBrad True, Lindsay Leveen, Mirmohammadyousef Motamedhashemi
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Abstract
A method of direct reduction of iron (DRI) is disclosed, the method comprising generating metallic iron by removing oxygen from iron ore using a reducing gaseous mixture with excess carbon monoxide that produces an excess CO2 by-product is provided. CO2 by-product is optionally sequestered. A system for carrying out the method is also disclosed.
Claims10
A method of direct reduction of iron (DRI) comprising:
- reducing a source of iron ore with a reducing gaseous mixture feed to produce a direct reduced iron product and a top gas feed;
- scrubbing the top gas feed;
- separating the top gas feed to provide a carbon dioxide by-product feed and an unreacted hydrogen and carbon monoxide feed;
- processing unreacted hydrogen and/or unreacted carbon monoxide from the unreacted hydrogen and carbon monoxide feed to provide a carbon monoxide feed and an essentially pure hydrogen feed;
- and
- sequestering the carbon dioxide by-product feed;
- wherein the reducing gaseous mixture feed is provided to a DRI unit by a partial oxidation unit (POX).
4 more elements
Dependencies are inferred from the claim text.