| (19) |
 |
|
(11) |
EP 0 210 847 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
10.05.1989 Bulletin 1989/19 |
| (43) |
Date of publication A2: |
|
04.02.1987 Bulletin 1987/06 |
| (22) |
Date of filing: 25.07.1986 |
|
|
| (84) |
Designated Contracting States: |
|
BE DE FR GB IT NL SE |
| (30) |
Priority: |
25.07.1985 JP 162909/85
17.06.1986 JP 139115/86
|
| (71) |
Applicant: KAWASAKI STEEL CORPORATION |
|
Chuo-Ku, Kobe-Shi
Hyogo-Ken (JP) |
|
| (72) |
Inventors: |
|
- Arai, Makoto
c/o Chiba Works
Chiba City
Chiba Pref. (JP)
- Sato, Kuniaki
c/o Chiba Works
Chiba City
Chiba Pref. (JP)
- Yamaguchi, Yasuhiro
c/o Chiba Works
Chiba City
Chiba Pref. (JP)
- Shiota, Isamu
c/o Chiba Works
Chiba City
Chiba Pref. (JP)
|
| (74) |
Representative: Kosmin, Gerald Emmanuel et al |
|
HASELTINE, LAKE & CO.
Hazlitt House
28 Southampton Buildings
Chancery Lane
London, WC2A 1AT
London, WC2A 1AT (GB) |
|
| |
|
| (54) |
Method and apparatus for cooling steel strips |
(57) A method and apparatus for cooling steel strips by means of a cooling liquid in a
continuous annealing line. The cooling liquid is forced to flow as steady flows along
both surfaces of a steel strip in directions opposite to moving directions of the
steel strip. An apparatus comprises flow rectifier plates in opposition to both the
surfaces of the steel strip to form flow passages between the steel strip and the
flow rectifier plates for forcing the cooling liquid through the flow passages, at
least one cooling liquid supply port on a downstream side of the moving steel strip
and at least one cooling liquid exhaust port on an upstream side of the moving steel
strip. In order to control the cooled steel strip temperature, part of the cooling
liquid used for cooling the steel strip is mixed with fresh cooling liquid to control
temperature of cooling liquid to be used for cooling by adjusting a mixing ratio of
the used and fresh cooling liquids, thereby keeping temperature of the cooled steel
strip within a predetermined target temperature range.
