C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
39/105, 261/38
C04B 35/101 (2006.01) B22D 41/54 (2006.01) C04B 35/103 (2006.01) C04B 35/583 (2006.01) C04B 35/66 (2006.01)
Patent
CA 1337205
Disclosed is a method of manufacturing an immersion nozzle for metal melts, particularly steel melts, from a starting mixture including aluminium oxide and boron nitride with the use of at least one fluxing agent, a bonding agent and optionally further conventional additives by preparing the starting mixture with liquid, shaping, drying and optionally firing the shaped and to an immersion nozzle manufactured in accordance with the method. The method is characterised in that a) a portion of the aluminium oxide used is replaced by one or more other refractory materials which have a lesser tendency of the deposits formation than aluminium oxide, and b) aluminium oxide has a maximum grain size of 250 m. The immersion nozzle manufactured by the method has an advantage that it has little or no tendency to adhere to oxide components in the melt and nevertheless has a sufficiently good resistance to changes in temperature.
605931
Luhrsen Ernst
Ott Albert
Didier-Werke Ag
Fetherstonhaugh & Co.
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