| 摘要 |
<p>A refractory sleeve, in particular a collector nozzle, which can be used on a metallurgical vessel, comprises an outer seal surface (3), a gas connection (5) disposed above the latter and a gas supply line (4) with an open outlet (8) preferably leading to its lower sleeve face surface (9). There is provided at least one further gas connection (5') with a respective gas supply line (4') where the outlet (8') is closed. This outlet (8') is arranged here such that it can easily be opened and so a supply of gas in the direction of the lower sleeve face surface (9) is made possible by this gas supply line (4'). In this way the service life of the collector nozzle can be doubled.</p> |
