Rippled surface stopper rod system
US7581663B2 · kind B2 · utility
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12Claims
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Assignee
Inventors
Key dates
| Filing date | Nov 3, 2004 |
| Grant date | Sep 1, 2009 |
| Priority date | — |
| Expiry date | Jun 12, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D3/1536
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention concerns stopper rod system for use in a metallurgical vessel, comprising a stopper rod and a nozzle. At least one of the stopper rod nose and the internal surface of the nozzle bore comprise a plurality of ripples that are arranged such that the size of a flow channel between the stopper rod nose and the internal stopper rod when the stopper rod system is in an open position discontinuously increases in size as a function of the distance downstream from the point of contact between the stopper rod and the nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.