Title:
ATMOSPHERIC GAS SEALING MEANS FOR CONTINUOUS-THERMAL TREATMENT FURNACE AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/221496
Kind Code:
A1
Abstract:
The present invention relates to an atmospheric gas sealing device for controlling hydrogen concentration of a rapid cooling zone in a continuous-thermal treatment furnace for continuously heat-treating a steel plate, and a pressure control method for the atmospheric gas sealing device and, more specifically, to an atmospheric gas sealing device for a continuous-thermal treatment furnace, which is installed between a rapid cooling zone and an annealing zone or between the rapid cooling zone and an over-aging zone, forms a pressure barrier between a first nozzle and a second nozzle facing each other, and controls a pressure in a buffer space between pressure barriers to be higher than a pressure of a first furnace band and a pressure of a second furnace band, and to a sealing device which maintains hydrogen concentration in an adjacent furnace band to be in a low level of concentration of 5% while maintaining concentration of a hydrogen gas in a rapid cooling zone up to maximum of 99% on the basis of a volume thereof through a pressure control method.
Inventors:
KIM HYEONG SOO (KR)
Application Number:
PCT/KR2019/005806
Publication Date:
November 21, 2019
Filing Date:
May 14, 2019
Export Citation:
Assignee:
NECS E&S CO LTD (KR)
International Classes:
C21D1/767; C21D9/00; C21D9/46; F27B9/04; F27D99/00
Foreign References:
| KR101717960B1 | 2017-03-20 | |||
| JP6179673B1 | 2017-08-16 | |||
| KR101717961B1 | 2017-03-20 | |||
| JP2005060738A | 2005-03-10 | |||
| KR20130032440A | 2013-04-02 |
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