Refractory casting nozzle for a changing device arranged at the outlet of a metallurgical vessel

A refractory casting nozzle, comprising:

• a tubular part;
• a top side refractory plate on a top side of the tubular part and which includes front and rear abutting surfaces on opposite front and rear end faces, a first lateral side surface and a second lateral side surface on an opposite side of the top side refractory plate from the first lateral side surface, the front abutting surface having an end region alongside the first lateral side surface and another end region alongside the second lateral side surface and the rear abutting surface having an end region alongside the first lateral side surface and another end region alongside the second lateral side surface;
• two centering elements protruding outward from the front abutting surface, each of the two centering elements protruding outward on a respective one of the two end regions of the front abutting surface;
• and
• a sheet jacket on the first and second lateral side surfaces and part of the front and rear abutting surfaces,
• the top side refractory plate including two bevellings each on a respective one of the two end regions of the rear abutting surface,
• the bevelling and the centering element on the end regions of the front and rear abutting surfaces alongside the first lateral side surface having a cooperating profile and the bevelling and the centering element on the end regions of the front and rear abutting surfaces alongside the second lateral side surface having a cooperating profile,
• the sheet jacket having a width between upper and lower surfaces of the top side refractory plate in portions on the front and rear abutting surfaces that is less than a width in portions on the first and second lateral side surfaces, and the front and rear abutting surfaces protrude beyond the sheet jacket and provide contact surfaces of the top side refractory plate adjacent the upper surface of the top side refractory plate.