Title:
IMMERSION NOZZLE
Document Type and Number:
WIPO Patent Application WO/2011/121802
Kind Code:
A1
Abstract:
Disclosed is an immersion nozzle which includes a vertically tubular straight barrel portion and a pair of right-and-left symmetric discharge holes. The barrel portion allows molten steel to pass therethrough in the vertical direction downward from a molten steel inlet portion provided on the upper end. The pair of discharge holes is provided at a lower portion of the straight barrel portion to discharge the molten steel sideward from the side of the straight barrel portion. To allow the molten steel to be discharged through the discharge holes of the immersion nozzle in a uniform and laminar flow and to prevent inclusion of mold powder in the vicinity of the immersion nozzle, the immersion nozzle is constructed such that the discharge holes have the following inner shape in the longitudinal cross section of the immersion nozzle passing through the center of the immersion nozzle and the center of the discharge holes. That is, the inner shape is gradually reduced in diameter in a curve from the starting point to the end portion of the discharge hole. Furthermore, within at least part or the entirety of the discharge hole, the curve representing the gradual reduction in diameter has an inner shape of the discharge hole expressed by a diameter in the longitudinal cross section of the immersion nozzle.
Inventors:
MIZOBE, Arito (1-1 Higashihama-machi, Yahatanishi-ku, Kitakyushu-sh, Fukuoka 86, 〒8068586, JP)
溝部 有人 (〒86 福岡県北九州市八幡西区東浜町１番１号 黒崎播磨株式会社内 Fukuoka, 〒8068586, JP)
溝部 有人 (〒86 福岡県北九州市八幡西区東浜町１番１号 黒崎播磨株式会社内 Fukuoka, 〒8068586, JP)
Application Number:
JP2010/059309
Publication Date:
October 06, 2011
Filing Date:
June 02, 2010
Export Citation:
Assignee:
KROSAKIHARIMA CORPORATION (1-1 Higashihama-machi, Yahatanishi-ku Kitakyushu-sh, Fukuoka 86, 〒8068586, JP)
黒崎播磨株式会社 (〒86 福岡県北九州市八幡西区東浜町１番１号 Fukuoka, 〒8068586, JP)
MIZOBE, Arito (1-1 Higashihama-machi, Yahatanishi-ku, Kitakyushu-sh, Fukuoka 86, 〒8068586, JP)
黒崎播磨株式会社 (〒86 福岡県北九州市八幡西区東浜町１番１号 Fukuoka, 〒8068586, JP)
MIZOBE, Arito (1-1 Higashihama-machi, Yahatanishi-ku, Kitakyushu-sh, Fukuoka 86, 〒8068586, JP)
International Classes:
B22D41/50; B22D11/10; B22D46/00
Attorney, Agent or Firm:
KOHORI, Susumu et al. (Hakata-Shin-Mitsui Bldg, 1-1 Hakataekimae 1-chome, Hakata-ku, Fukuoka-sh, Fukuoka 11, 〒8120011, JP)
Claims: