Method for producing sponge iron, and reduced iron powder and method for production thereof
US6918945B2 · kind B2 · utility
4Cited by
6References
21Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 13, 2002 |
| Grant date | Jul 19, 2005 |
| Priority date | — |
| Expiry date | Feb 13, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for manufacturing sponge iron includes heating iron oxide together with a solid reducing agent to reduce the iron oxide into sponge iron, wherein the iron oxide includes a mixture of powdered hematite and powdered iron ore or a mixture of powdered hematite and powdered mill scale, the powdered hematite has a specific surface area of 2.0 m2/g or more, and the content of the powdered hematite is 5-45% by mass with respect to the total quantity of iron oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.