Title:
METHOD FOR HEATING STEEL PLATE, METHOD FOR MANUFACTURING PLATED STEEL PLATE, DIRECT-FIRED HEATING FURNACE, AND CONTINUOUS HOT-DIP GALVANIZATION FACILITY
Document Type and Number:
WIPO Patent Application WO/2024/014371
Kind Code:
A1
Abstract:
The purpose of the present invention is to manufacture a zinc-plated steel sheet that is free of pickups and that has a stable quality. In this method for heating a steel plate, a steel plate passes through a direct-fired heating furnace having an oxidization band in which operation is performed with an air ratio of 1 or higher, and passes through a reduction band in which operation is performed with an air ratio of less than 1. While the steel plate is passing through at least the reduction band, the front surface side and the back surface side of the steel plate are subjected to heating by fire blasted from one or more slit burners disposed extending along the width direction of the steel plate.
Inventors:
TERASAKI YU (JP)
OSUKA KENICHI (JP)
TAKEDA GENTARO (JP)
OSUKA KENICHI (JP)
TAKEDA GENTARO (JP)
Application Number:
PCT/JP2023/024886
Publication Date:
January 18, 2024
Filing Date:
July 05, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D9/56; C23C2/02; C23C2/06; C23C2/28; C23C2/40; C25D5/36; F23N5/00; C21D9/46; C22C38/00; C22C38/12; C22C38/26
Domestic Patent References:
| WO2021166350A1 | 2021-08-26 |
Foreign References:
| JP2008001934A | 2008-01-10 | |||
| JPH0257639A | 1990-02-27 | |||
| JP2020190017A | 2020-11-26 | |||
| JP2021147648A | 2021-09-27 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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