Abstract: A converter plant with a sealing ring provided between the hood of a tiltable converter and the mouth of a smoke gas flue, drives are provided, for moving the sealing ring can be moved so far away from the converter hood that the converter can be tilted without obstruction. At the same time, the sealing ring is designed as a sleeve which surrounds the smoke gas flue from outside. The mouth of the sleeve is capable, in the closing position, of leaning against the converter hood the and the sleeve has vertical severing cuts which divide the sleeve into at least two segments.

Abstract: The invention is directed to a gas tight lance closing device at a cooling chimney hood for steel converters. An opening is provided in the cooling chimney for a jetting lance, which latter can be raised and lowered. The diameter of the opening is dimensioned in such a way that an annular gap remains between the inner edge of the opening and the outer circumference of the jetting lance. In order to close the chimney opening toward the lance so as to be gas tight and to enable operation at an internal overpressure of more than 0.