Method for producing raw iron from iron concentrates for the manufacture of gas, and plant apparatus for carrying out the method
US4834791A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1987 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | Mar 23, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S75/958
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for producing raw iron from iron-bearing oxidic material, comprising finally reducing the iron oxide by charging the iron oxide, coal, oxygen gas and slag-forming flux to a molten iron bath contained in at least one reactor vessel, a final reduction reactor (2) for final reduction of the iron oxide, and pre-reducing primarily non-reduced iron oxide in a pre-reduction stage (1), and subsequently charging the pre-reduced iron oxide to the reactor, and generating reduction gas (17) for the aforesaid pre-reduction process. The method is particularly characterized in that reduction gas for the pre-reduction process (1) is generated by a separate gas generating process (3) effected in at least one reactor (3), a gas generating reactor, separate from the final reduction reactor or reactors (2). The invention also relates to a plant for carrying out the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.