Patent ID: 8097206

Claim:
A device for introducing blow or burner lances, which are displaceable in an axial direction, into a vacuum-sealed reaction chamber for the purpose of metallurgical treatment of liquid metal or steel melts in a vacuum, comprises a guide tube ( 8 ) with gland ( 14 ) for guiding and sealing off the lance ( 7 ), a water-cooled connection ( 1 ) with connector flange ( 4 ), which connection is attached to the reaction chamber and connected thereto, and a vacuum-sealed housing ( 5 ) with a housing flange ( 3 ), as well as a compensator ( 12 ) installed between the housing and the gland guide tube ( 8 ) for compensating lateral, axial or angular relative motions of the guide tube ( 8 ) and housing ( 5 ) during the course of movement of the lance, a lower flange of the compensator ( 12 ) is connected to a flange ( 10 ) attached to the movable guide tube ( 8 ) with gland ( 14 ), and an upper flange of the compensator ( 12 ) is screwed onto an upper fixed housing flange ( 11 ) so that an internal annular space ( 6 ), formed between the compensator walls and the flanges on the one hand and the outer surface of the guide tube ( 8 ) on the other hand, is connected to external air and is thus at atmospheric pressure, while the internal space ( 5 ) of the housing chamber, which space surrounds the compensator ( 12 ), is connected to the vacuum pressure prevailing in the reaction chamber.