Method for producing directly reduced, desulphurized iron
US6464752B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2001 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | May 7, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/134
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a method for producing directly reduced, desulfurized iron in a multiple-hearth furnace which comprises two zones arranged one above the other and each having several hearths. Iron ore is reacted with a reducing agent in a first zone of the multiple-hearth furnace at a temperature ranging from 800° C. to 1100° C. to obtain metallic iron. In addition, the gases are desulfurized using desulphurizing agents, whereby the directly reduced iron is discharged from the multiple-hearth furnace and the desulfurized gases are guided into a second zone where the iron ore is preheated to a temperature ranging from 600° C. to 800° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.