Title:
METHOD FOR CONTROLLING TEMPERATURE OF COOLING WATER FOR STEEL PLATE AND DEVICE FOR CONTROLLING TEMPERATURE OF COOLING WATER
Document Type and Number:
WIPO Patent Application WO/2022/215304
Kind Code:
A1
Abstract:
In a method for controlling the temperature of cooling water for a steel plate according to the present invention, the thickness of a water film remaining on a steel plate on the exit side of a drainer roll is calculated, a line speed is taken into account and change in the thickness of the water film in the interval from the exit side of the drainer roll to the exit side of drying equipment is calculated, the line speed is taken into account and change in the temperature of the steel plate in the interval from the exit side of the drainer roll to the entry side of coating equipment is calculated, a steel plate temperature for the exit side of the drainer roll at which the position where the thickness of the water film on the steel plate becomes zero matches the exit side position of the drying equipment is calculated, the calculated steel plate temperature is set as a lower limit value for a cooling water temperature, a steel plate temperature for the exit side of the drainer roll at which the steel plate temperature on the entry side of the coating equipment matches a predetermined temperature is calculated, the calculated steel plate temperature is set as an upper limit value for the cooling water temperature, and the temperature of the cooling water is controlled within the range of the set lower limit value and upper limit value.
More Like This:
| JPS5314648 | STEEL BAR ROLLING EQUIPMENT |
| JPH11193815 | SUBMERGED ROLL |
Inventors:
HIRAI MASAKI (JP)
OTA YUSUKE (JP)
TANOKUCHI ICHIRO (JP)
OTA YUSUKE (JP)
TANOKUCHI ICHIRO (JP)
Application Number:
PCT/JP2021/048585
Publication Date:
October 13, 2022
Filing Date:
December 27, 2021
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D9/56; B21B37/74; B21B45/02; B21C51/00; C21D1/00; C21D9/573; C21D11/00
Foreign References:
| JPS61136636A | 1986-06-24 | |||
| JPH0942843A | 1997-02-14 | |||
| JPH08193276A | 1996-07-30 | |||
| JPS6221076U | 1987-02-07 | |||
| JP2003277834A | 2003-10-02 | |||
| JP2015189998A | 2015-11-02 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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