Process for producing molten pig iron or steel pre-products
US4725308A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Jun 18, 1986 |
| Grant date | Feb 16, 1988 |
| Priority date | — |
| Expiry date | Jun 18, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21B2100/66
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
There is disclosed a process for the production of molten pig iron or of steel pre-products from particulate ferrous material as well as for the production of reduction gas in a meltdown gasifier. A fluidized-bed zone is formed by coke particles upon the addition of coal and by blowing in oxygen-containing gas by nozzle pipes penetrating the wall of the meltdown gasifier. The ferrous material to be reduced is introduced into the fluidized bed. In order to be able to produce molten pig iron and liquid steel pre-products in a direct reduction process with a lower sulfur content than has hitherto been the case, without having to make any particular demands on the sulfur content of the coal used, the ferrous material to be reduced is supplied closely above the blow-in gas nozzle plane producing the fluidized bed. An arrangement for carrying out the process includes a meltdown gasifier in which charging pipes penetrating its wall are provided in the region of the fluidized-bed zone closely above the plane formed by the nozzle pipes. The ferrous material to be melted as well as the dusts separated from the reduction gas and, if desired, fluxes containing calcium oxide, magnesium oxide, c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.