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Title:
CONTINUOUS CASTING METHOD FOR STEEL
Document Type and Number:
Japanese Patent JP2010058167
Kind Code:
A
Abstract:

To provide a slab less in surface cracks by suppress the ununiformity of cooling in a mold due to zirconia particles separated from an immersion nozzle caused by the erosion of a zirconia-graphite refractory constructing a slag line part.

When a steel is continuously cast while adding mold powder into a mold using an immersion nozzle 4 having a slag line part 4b of a zirconia-graphite refractory, the continuous casting is performed using the immersion nozzle in which the maximum particle diameter of the zirconia raw material in the zirconia-graphite refractory lies in the range in inequality (1) to a casting velocity for a slab in a regular region: D700-200Vc (1); wherein, D is the maximum particle diameter (m) of the zirconia raw material, and Vc is the casting velocity (m/min) in a regular region.


Inventors:
UEHARA HIROHIDE
HINO TADAAKI
HATORI SATOSHI
ITO TOSHIYUKI
Application Number:
JP2008229315A
Publication Date:
March 18, 2010
Filing Date:
September 08, 2008
Export Citation:
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Assignee:
JFE STEEL CORP
International Classes:
B22D11/10; B22D11/20; B22D41/54
Domestic Patent References:
JPH05361A1993-01-08
JPH04182049A1992-06-29
JPH1177257A1999-03-23
JPH05367A1993-01-08
JP2004136367A2004-05-13
JP2001179407A2001-07-03
JPH081293A1996-01-09
JP2001300700A2001-10-30
JPH05361A1993-01-08
JPH04182049A1992-06-29
JPH1177257A1999-03-23
Attorney, Agent or Firm:
Kenichiro Ochiai
Kazuhiro Mori



 
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