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US 2026/0308705 A1Published application
Method of producing reduced iron
AssigneeJfe Steel Corporation
InventorsYoshiko NAKAHARA, Koki TERUI, Taihei NOUCHI
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Abstract
Provided is a method of producing reduced iron that can achieve both energy savings and a decrease in CO2 emissions. A system is configured to circulate and reuse top gas and includes a blowing process, a reduction process, a distribution process, a synthesis process, and a reforming process. Additional H2O is supplied to the synthesis process, and an amount of the additional H2O supplied to the synthesis process is controlled according to amounts of CO and H2O contained in a first top gas.
Claims20
A method of producing reduced iron, the method comprising:
- a charging process of charging iron oxide into a reduction furnace;
- a blowing process of blowing reducing gas into the reduction furnace;
- a reduction process, in the reduction furnace, of reducing the iron oxide by the reducing gas to obtain reduced iron;
- a distribution process of distributing top gas discharged from the reduction furnace into a first top gas and a second top gas;
- a synthesis process of synthesizing regenerative methane gas from the first top gas and hydrogen gas;
- and
- an additional supply process of supplying additional H2O to the synthesis process;
- and
- a reforming process of using the regenerative methane gas and the second top gas as feed gas to obtain the reducing gas from the feed gas, wherein
- an amount of the additional H2O supplied to the synthesis process is controlled according to an amount of CO and an amount of H2O contained in the first top gas.
7 more elements
Dependencies are inferred from the claim text.