COOLING DEVICE, HOT-ROLLED STEEL SHEET MANUFACTURING APPARATUS, AND HOT-ROLLED STEEL SHEET MANUFACTURING METHOD

Title:

COOLING DEVICE, HOT-ROLLED STEEL SHEET MANUFACTURING APPARATUS, AND HOT-ROLLED STEEL SHEET MANUFACTURING METHOD

Document Type and Number:

WIPO Patent Application WO/2013/012060

Kind Code:

A1

Abstract:

Provided is a cooling device, wherein water is drained appropriately to cope with even an increase in the water volume density of cooling water to thereby ensure high cooling capability. A cooling device is provided with a plurality of cooling nozzles which are disposed downstream from a hot finished rolling mill line, are capable of supplying cooling water toward a pass line from above, and are arranged in the direction of the pass line, and an upper surface guide which is disposed between the pass line and the cooling nozzles. The cooling device is characterized in that when the water volume density of the cooling water to be jetted is set to qm (m3/(m2·sec)), the pitch between the cooling nozzles in the direction of the pass line is set to L (m), the distance between the lower surface of the upper surface guide and the pass line is set to hp (m), the homogeneous cooling width is set to Wu (m), and the cross-sectional area of a virtual flow path of drainage water flowing in the direction of the width of a steel sheet per pitch between the cooling nozzles in the direction of the pass line is set to S (m2), a predetermined relationship is established.

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Inventors:

KOBAYASHI KAZUAKI (JP)
HOSHO TOMOFUMI (JP)
MATSUDA KEISUKE (JP)
HARAGUCHI YOICHI (JP)
IKEMOTO YUJI (JP)
HORII KENJI (JP)

Application Number:

PCT/JP2012/068438

Publication Date:

January 24, 2013

Filing Date:

July 20, 2012

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)
MITSUBISHI HITACHI METALS (JP)
KOBAYASHI KAZUAKI (JP)
HOSHO TOMOFUMI (JP)
MATSUDA KEISUKE (JP)
HARAGUCHI YOICHI (JP)
IKEMOTO YUJI (JP)
HORII KENJI (JP)

International Classes:

B21B45/02

Foreign References:

JP2011020146A	2011-02-03
JP2011011217A	2011-01-20
JP2004066308A	2004-03-04
JP3770216B2	2006-04-26
JP4029871B2	2008-01-09

Other References: