Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
IMMERSION NOZZLE AND CONTINUOUS CASTING METHOD USING THE SAME
Document Type and Number:
Japanese Patent JP2011136354
Kind Code:
A
Abstract:

To provide an immersion nozzle capable of effectively reducing the generation rate of surface defects in the center part of a cast slab, which are caused by MHD countercurrents, and of which the structure is simple and the maintenance is easy, and to provide a continuous casting method using the immersion nozzle.

The immersion nozzle 2 is equipped with dispersion preventing plates 6, which extend in the longitudinal direction of a continuous casting mold 1, on both sides of a nozzle body for pouring molten steel into the continuous casting mold 1, with discharging holes 3 put between the plates 6. When using the immersion nozzle 2 to perform continuous casting of molten steel while applying a static magnetic field produced by electromagnetic brakes 4, MHD countercurrents, which flow toward the discharging holes 3, ascend toward a surface level 5 through a central flow passage formed between the two dispersion preventing plates 6, so that the MHD countercurrents become hard to come into contact with a solidification interface at the center part. Thus, the generation index of surface defects at the center part is remarkably reduced.


Inventors:
SUEMATSU YOSHIAKI
MIZOGUCHI TOSHIAKI
MIKI DAISUKE
KANEKO TETSUYA
Application Number:
JP2009296859A
Publication Date:
July 14, 2011
Filing Date:
December 28, 2009
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NIPPON STEEL CORP
International Classes:
B22D11/10; B22D11/115; B22D41/50
Domestic Patent References:
JP2005021941A2005-01-27
JPH04333353A1992-11-20
JPS6466052A1989-03-13
JPH08300113A1996-11-19
JP2003266155A2003-09-24
JPS63235050A1988-09-30
JPH02284750A1990-11-22
JPH05146851A1993-06-15
JP2005021941A2005-01-27
JPH04333353A1992-11-20
JPS6466052A1989-03-13
JPH08300113A1996-11-19
JP2003266155A2003-09-24
JPS63235050A1988-09-30
JPH02284750A1990-11-22
Attorney, Agent or Firm:
Tatsuo Watanuki
Fumio Yamamoto
Yukine Sekine
Kita Shizuo