Title:
METHOD FOR HEATING STEEL PLATE, METHOD FOR PRODUCING PLATED STEEL PLATE, DIRECT-FIRED HEATING FURNACE, AND CONTINUOUS HOT-DIP GALVANIZING EQUIPMENT
Document Type and Number:
WIPO Patent Application WO/2024/014372
Kind Code:
A1
Abstract:
The purpose of the present invention is to produce a galvanized steel plate that is free from unplating and has stable quality. A method for heating a steel plate, the method including heating the obverse and reverse sides of a steel plate passing through a direct-fired heating furnace that has an oxidation zone operated at an air ratio of 1 or greater and a reduction zone operated at an air ratio of less than 1 by using flames that are injected from one or more slit burners while the steel plate passes at least through the oxidation zone.
Inventors:
TERASAKI YU (JP)
TAKEDA GENTARO (JP)
OSUKA KENICHI (JP)
TAKEDA GENTARO (JP)
OSUKA KENICHI (JP)
Application Number:
PCT/JP2023/024887
Publication Date:
January 18, 2024
Filing Date:
July 05, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D9/46; C21D9/56; C22C38/00; C22C38/12; C22C38/26; C23C2/02; C23C2/06; C23C2/28; C23C2/40; C25D5/36; F23N5/00
Domestic Patent References:
| WO2021166350A1 | 2021-08-26 |
Foreign References:
| JP2008001934A | 2008-01-10 | |||
| JP2020190017A | 2020-11-26 | |||
| JP2021147648A | 2021-09-27 | |||
| JPH0257639A | 1990-02-27 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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