Title:
鋼の連続鋳造用浸漬ノズルおよびそれを用いる鋼の連続鋳造方法
Document Type and Number:
Japanese Patent JP4343907
Kind Code:
B2
Abstract:
Disclosed is a nozzle for continuous casting of clean steel, capable of preventing adhesion of Al 2 O 3 -based inclusions to a wall surface of the inner hole of the nozzle while fully achieving an effect of a swirl vane provided as a means to prevent occurrence of drift in molten steel passing through the inner hole. The swirl vane is disposed in the inner hole having the wall surface at least partly formed as a tubular-shaped refractory layer prepared by controlling a weight ratio of CaO / MgO and an apparent porosity to have a thickness of 3 to 20 mm, so as to prevent adhesion of Al 2 O 3 -based inclusions to the wall surface and the swirl vane while effectively maintaining the anti-drift effect for long hours. Further, inert gas is injected into a molten steel flow between an upper nozzle and the swirl vane to facilitate surfacing of Al 2 O 3 -based inclusions in a mold and reduce Al 2 O 3 -based inclusions in molten steel so as to achieve stable casting operation and high-quality steel with high cleanness.
Inventors:
Katsumi Morikawa
Takeki Yoshitomi
Asano Keisuke
Ueda Saeko
Takeki Yoshitomi
Asano Keisuke
Ueda Saeko
Application Number:
JP2005513327A
Publication Date:
October 14, 2009
Filing Date:
August 23, 2004
Export Citation:
Assignee:
Kurosaki Harima Co., Ltd.
International Classes:
B22D11/10; B22D41/50; B22D41/54; B22D41/58; C04B35/01; C04B35/043; C04B35/057; C04B35/06; C04B35/18; C04B35/66
Domestic Patent References:
| JP8039214A | ||||
| JP2002239690A | ||||
| JP10263765A | ||||
| JP9194253A | ||||
| JP7024557A |
Attorney, Agent or Firm:
Masu Kobori
Takato Tsutsumi
Takato Tsutsumi
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