Device for injecting divided solid materials in a smelting blast furnace
US4771993A · kind A · utility
4Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 1986 |
| Grant date | Sep 20, 1988 |
| Priority date | — |
| Expiry date | May 2, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21B5/003
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The tuyere comprises a substantially cylindrical or slightly convergent frusto-conical downstream part, and a divergent frusto-conical upstream part; the plasma torch is placed co-axially to the tuyere at the inlet to the upstream part thereof; the solid materials injection nozzle issues at an angle into the upstream part of the tuyere and the angle of taper of the upstream part of the tuyere substantially corresponds to the angle of natural expansion of the plasma jet, so that said materials are carried with the plasma jet and that part of them are provided onto the inner wall of the tuyere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.