| 摘要 |
PURPOSE:To improve the reliability of continuous casting by disposing an oxidation resistant fire resisting material layer and highly stabilizing the hermeticity and life of the nozzle for continuous casting, thereby stabilizing the operation of the continuous casting over a long period of time and improving and stabilizing the quality of a slab. CONSTITUTION:This nozzle for continuous casting of metal is constituted by disposing and integrating an oxidation resistant fire resisting material layer 5 consisting of ZrO2-SiC-C contg. a low melting glass component over a 5 to 120mm range lower than the upper surface of a fitting surface 2 to a fire resisting member existing in the upper part where the nozzle does not come into contact with the molten metal during casting. As a result, the oxidation and the deterioration in the quality by contact of the fitting surface and the outside surface near this fitting surface with the atm. air at the time of the continuous casting including the time of preheating of the long nozzle are drastically and effectively suppressed, by which the long-time safety and stabilization of the continuous casting of the steel are assured, the grade of the quality of the slab is stabilized, the reliability of the continuous casting is enhanced and the cost is reduced. |
