Process for the production of steel from fine ore hot briquetted after fluidized bed reduction
US4946498A · kind A · utility
49Cited by
2References
7Claims
0Family size
Inventor
Key dates
| Filing date | Oct 16, 1989 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Oct 16, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Fine ore is reduced in a circulating fluidized bed by a reduction gas in the presence of fine coal, the discharged mixture of iron sponge particles and fine coal is subjected to hot compacting and then fed to a melting vessel in which oxygen is injected into the molten material through nozzles. The melting vessel can also be supplied with scrap which has been pre-heated by the hot waste gases from the melting vessel, in a scrap pre-heater which is fitted onto the melting vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.