B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
B22D 41/50 (2006.01)
Patent
CA 2387375
The invention concerns a refractory nozzle for arrangement in or on a wall of a metallurgical crucible, particularly for steel melts, having a flow passage and a discharge duct surrounding the flow passage, wherein the discharge duct has a surface delimiting the flow passage and an outer housing. In order to improve the known solutions of the prior art, the nozzle is characterized in that the discharge duct has an upper part and a lower part, in that the surface of the upper part delimiting the flow passage is made of a different material than the surface of the lower part delimiting the flow passage, and in that the lower part is fixed in or on the upper part. In a second embodiment the invention is characterized in that the discharge duct has an upper part and a lower part, in that the lower part is fixed on or in the upper part, and in that the diameter of the flow passage in the upper part is greater than in the lower part.
Hallam Chris
Kendall Martin
Heraeus Electro-Nite International N.v.
Macrae & Co.
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