Process and plant for the direct reduction of iron-oxide-containing materials
US5871560A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 15, 1997 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Jan 15, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/143
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A direct reduction process is disclosed for iron oxide-containing materials. Synthesis gas is mixed with top gas produced during direct reduction of the iron oxide-containing materials and is used as reduction gas for directly reducing and heating the iron oxide-containing materials up to reduction temperature. In order to set the H.sub.2 S content at a predetermined value by a relatively simple technique and with a relatively simple equipment, at least part of the sulphur contained in the iron oxide-containing materials as H.sub.2 S produced during heating or direct reduction is added to the reduction gas together with the top gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.