Title:
CONTINUOUS CASTING METHOD FOR STEEL
Document Type and Number:
WIPO Patent Application WO/2018/198181
Kind Code:
A1
Abstract:
In a continuous casting method in which an alternating current magnetic field is applied to molten steel in a mold to give rise to a swirling agitating flow in the molten steel in the mold, a high-quality cast slab is produced by imparting an appropriate alternating current magnetic flux density corresponding to a submerged depth of a submerged nozzle and to the distance from the surface of the molten steel in the mold to the position of the peak alternating current magnetic field.
In the continuous casting method for steel according to the present invention, an alternating current magnetic field is applied to molten steel in a mold by means of an alternating current magnetic field generating device installed opposite to a rear surface of a pair of long sides of the mold, to give rise to a swirling agitating flow in a horizontal direction in the molten steel in the mold, wherein: the spacing between the opposing long sides of the mold is 200 to 300 mm; a discharge angle of discharge holes in the submerged nozzle, which has two discharge holes, is in the range of 5° downward to 50° downward; the frequency of the alternating current magnetic field is at least equal to 0.5 Hz and at most equal to 3.0 Hz; and the submerged depth of the submerged nozzle and the magnetic flux density in the position of the peak alternating current magnetic field generated by the alternating current magnetic field generating device are controlled in accordance with the position of the peak alternating current magnetic field to be within prescribed ranges.
Inventors:
MATSUI AKITOSHI (JP)
KONDO HIROKAZU (JP)
KIKUCHI NAOKI (JP)
KONDO HIROKAZU (JP)
KIKUCHI NAOKI (JP)
Application Number:
PCT/JP2017/016326
Publication Date:
November 01, 2018
Filing Date:
April 25, 2017
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B22D11/115; B22D11/10
Foreign References:
| JP2008279482A | 2008-11-20 | |||
| JP2007105745A | 2007-04-26 | |||
| JP2005152996A | 2005-06-16 | |||
| JP2003326344A | 2003-11-18 | |||
| JP2003320440A | 2003-11-11 | |||
| JP2000202603A | 2000-07-25 | |||
| JP2001047201A | 2001-02-20 |
Other References:
See also references of EP 3597328A4
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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