Title:
IMMERSION NOZZLE
Document Type and Number:
WIPO Patent Application WO/2017/081934
Kind Code:
A1
Abstract:
The present invention provides a flat immersion nozzle, wherein the immersion nozzle stabilizes molten steel discharge flow and stabilizes the melt surface inside a mold, i.e., reduces fluctuation thereof. In the present invention, the immersion nozzle has a flat shape in which the width Wn of the inner hole is greater than the thickness Tn of the inner hole, wherein center protrusion sections (1) are provided in the center section of the wall surface of the flat portion in the width direction. Wp/Wn, which is the ratio of the length Wp of the center protrusion sections (1) in the width direction in relation to the width Wn, is 0.2-0.7. The center protrusion sections (1) are disposed symmetrically in a pair, and the total length Tp of the pair of center protrusion sections in the thickness direction is 0.15-0.75 of Tn.
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Inventors:
FUKUNAGA SHINICHI (JP)
MIZOBE ARITO (JP)
OKI KENICHI (JP)
FURUKAWA HIROKI (JP)
MIZOBE ARITO (JP)
OKI KENICHI (JP)
FURUKAWA HIROKI (JP)
Application Number:
PCT/JP2016/076915
Publication Date:
May 18, 2017
Filing Date:
September 13, 2016
Export Citation:
Assignee:
KROSAKIHARIMA CORP (JP)
International Classes:
B22D11/10; B22D41/50
Foreign References:
| JP2004122226A | 2004-04-22 | |||
| JPS58361A | 1983-01-05 | |||
| CN101966567A | 2011-02-09 | |||
| CN103231048A | 2013-08-07 | |||
| CN101733373A | 2010-06-16 |
Other References:
See also references of EP 3375545A4
Attorney, Agent or Firm:
EIWA PATENT FIRM (JP)
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