Top-blowing lance and method for refining molten iron using the same
US9580764B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2012 |
| Grant date | Feb 28, 2017 |
| Priority date | — |
| Expiry date | Apr 1, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A top-blowing lance includes a refining oxygen gas blowing nozzle having a plurality of ejection openings through which oxygen gas is blown into an iron bath in a reaction vessel, the ejection openings being disposed along a circular orbit at intervals, and a burner nozzle having an axis coaxial with the central axis of the circular orbit, forming a flame inside the refining oxygen gas blowing nozzle, and having ejection openings for blowing a powder heated by the flame into the iron bath, wherein an indicator A that indicates the positional relationship between the ejection openings of the refining oxygen gas blowing nozzle and the ejection openings of the burner nozzle satisfies the specified conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.