Process for the production of carburized sponge iron
AssigneeHYBRIT Development AB
InventorsJenny Anna Gunilla Hyllander, Magnus Tottie
Life of this patent
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Abstract
The present disclosure relates to a process for the production of carburized sponge iron. The process comprises the steps of reducing iron ore pellets using a carbon-lean reducing gas in a direct reduction shaft reactor to provide a sponge iron intermediate; transferring the sponge iron intermediate to a carburization unit; and carburizing the sponge iron intermediate in the carburization unit using a carburizing gas to provide carburized sponge iron. The disclosure further relates to a system for the production of carburized sponge iron, a carburized sponge iron produced by the aforementioned process, and a sponge iron intermediate obtained during the production of such a carburized sponge iron.
Claims10
A process for the production of carburized sponge iron (109, 209), the process comprising the steps:
- reducing (s303) iron ore (107, 207) using a carbon-lean reducing gas (115, 215), said carbon-lean reducing gas comprising less than about 10 vol % of carbon-containing gases, in a direct reduction shaft (111, 211) to provide a sponge iron intermediate (108, 208), wherein the sponge iron intermediate has a degree of reduction from about 60% to about 80%;
- transferring (s305) the sponge iron intermediate to a carburization unit (112, 213);
- and
- carburizing (s307) the sponge iron intermediate in the carburization unit using a carburizing gas (114, 214) to provide carburized sponge iron.
Dependencies are inferred from the claim text.