Industrial furnace and associated jet element

A nozzle element for introducing gas into an industrial furnace for melting metals, having the following features:

• a) a nozzle body (3) made of a refractory material having a hot side (5) and a cold side (7);
• b) a metal jacket (9) covering the refractory material on the cold side (7) of the nozzle body (3);
• c) heat-conducting elements (11, 13, 15, 17/17.2) which are in contact with the metal jacket (9) and extend into the refractory material whereby the heat-conducting elements (11, 13, 15, 17.1, 17.2)) are able to absorb heat and convey it rapidly to the metal jacket (9), said heat-conducting elements (11, 15, 17, 17.1, 17.2) each having an end that faces the hot side (5) of the nozzle body (3) and that is disposed a distance from the hot side (5) of the nozzle body (3);
• d) the metal jacket (9) is coolable;
• and
• e) an outer nozzle pipe (19) which extends through the metal jacket (9) and the nozzle body (3) from the cold side (7) to the hot side (5) of the nozzle body (3).