Tap-hole closing arrangement of a metallurgical vessel
US4261554A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1979 |
| Grant date | Apr 14, 1981 |
| Priority date | — |
| Expiry date | Oct 9, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21C5/4653
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An arrangement for closing the tap hole of a metallurgical vessel designed for separating metal and slag, includes a closure body which is insertable into the tap hole so as to leave free an annular gap relative to the tap hole wall. The closure body contains a compressed-gas conduit and has an outer jacket tapering towards the mouth of the compressed-gas conduit. In order to ensure the maintenance of an annular gap of constant size, and thus the original diameter of the tap hole, the tap hole is set off in step-like manner by two parts so as to widen outwardly. The outer tap hole part has a larger diameter than that the inner part, which is delimited by the lining of the metallurgical vessel. The outer part is formed by a hollow body whose inner ring wall surrounds the outer jacket of the closure body peripherally at a radial distance. The hollow body also has a cavity into which at least one supply and one discharge conduit for a coolant enter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.