Manufacture of steel from ores containing high phosphorous and other undesirable constituents
US4244732A · kind A · utility
10Cited by
8References
8Claims
0Family size
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Key dates
| Filing date | Mar 27, 1979 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Mar 27, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The production of relatively low phosphorous, semifinished steel from blended presized granules of high phosphorous iron ore and limestone, directly and selectively reducing the iron oxide to sponge iron and calcined lime with the current of hot reducing gases in a shaft furnace, charging heated granules directly to a melting furnace to obtain semifinished steel and slagging off phosphorous and other undesirable components and thereafter refining the semifinished steel in a conventional electric furnace.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.