Steel-making method and plant
US6126717A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1998 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Jul 29, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method wherein air is separated in an air separation unit (9), the oxygen thus generated is consumed during at least one step (2, 12, 13) of the steel-making process, the resulting gas is at least partially decarbonated, and the at least partially decarbonated gas is used (at 13) in a reduction reaction of the steel-making process. The partial decarbonation step cyclically includes a CO.sub.2 fixation step using a fixation agent, and a regeneration step in which the agent is regenerated in a reactor. Nitrogen generated by the air separation unit (9) is fed into the reactor during the fixation agent regeneration step. The method is useful in combined coal gassification/direct iron ore reduction processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.