Method of producing iron and steel from iron ore
US3951644A · kind A · utility
2Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 1974 |
| Grant date | Apr 20, 1976 |
| Priority date | — |
| Expiry date | May 6, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21B2100/66
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to an improved method of producing molten iron and steel from iron ore wherein the iron ore is charged to a shaft furnace along with coke and limestone and the mixture is blasted with a heated gas so that the iron ore is reduced to pig iron. By the present invention, at least a portion of the furnace residue gas stream containing carbon monoxide is oxidized so that a heated gas stream is produced and oxygen is combined therewith. The resulting heated oxygen enriched gas stream is recycled into the furnace as blast gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.