SECONDARY COOLING METHOD FOR CONTINUOUS CAST SLAB

WIPO Patent Application WO/2021/085474

A1

Provided is a secondary cooling method for continuous cast slabs that facilitates facility maintenance and that can increase uniformity of cooling capacity.　A secondary cooling method for continuous cast slabs according to the present invention is a method in which spray nozzles 21 each having a quadrangular ejection pattern are aligned in a slab width direction between guide rolls 19 disposed at an interaxial distance P (unit: mm) and each having a radius d (unit: mm) in the entire section or a part of the section in a casting direction of a horizontal zone 15 in a secondary cooling zone of a continuous casting machine 1 and cooling a slab 5, the secondary cooling method for continuous cast slabs being characterized in that a relationship between the interaxial distance P and a distance L (unit: mm) between a point A and a point B, which are two points where the water volume density of cooling water sprayed from each of the spray nozzles 21 becomes 50% of a maximum value of the water volume density in the casting direction, satisfies formula (1): L/P≥0.70, ant that cooling is performed while a nucleate boiling state is maintained in the range of the point A to the point B.

JP2758315	METHOD FOR AUTOMATICALLY CHECKING SECONDARY COOLING NOZZLE IN CONTINUOUS CASTING EQUIPMENT
JPS59123721	PRODUCTION OF COLD ROLLED STEEL SHEET HAVING EXCELLENT PROCESSABILITY

OSUKA KENICHI (JP)
UEOKA SATOSHI (JP)

PCT/JP2020/040435

May 06, 2021

October 28, 2020

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JFE STEEL CORP (JP)

B22D11/124; B22D11/22

JP2003136205A	2003-05-14
JP2006315044A	2006-11-24
JP2013022620A	2013-02-04
JP2005103628A	2005-04-21
JP2003136205A	2003-05-14
JP2018015781A	2018-02-01

See also references of EP 4052815A4

KUMASAKA Akira et al. (JP)

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