Holder for an injector and method for its operation

The invention relates to a holder 10 for receiving at least one injector in metallurgical vessels, in particular in electric arc furnaces, with the media, such as gases and / or solids that are introduced into the metallurgical vessel, having means of the coolant guides 14, 15 support 10 of the is respective injector via an opening 11 arranged at or protected in the vessel wall of the metallurgical vessel. It is thereby inventively provided that the wall thickness W of the Injektorkuhlblocks 10 is made variable in response to the heat load on the hot side of the Injektorenblocks 10 between the hot side and the coolant guide base. The invention also relates to a method for operating such a holder 10th