Title:
FILLING STRUCTURE OF FILLER FOR SLIDING OPENING/CLOSING DEVICE AND METHOD FOR MANUFACTURING SLAB
Document Type and Number:
WIPO Patent Application WO/2022/113543
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a filling structure for a filler of a sliding opening/closing device and a method for manufacturing a slab, which make it possible to obtain a high natural opening ratio when using a ladle that uses a large number of nozzles. A filling structure of a filler (3) used for a sliding opening/closing device (2) of a ladle (1) for steelmaking has a three-layer structure configured of an upper layer (41), a middle layer (42), and a lower layer (43), wherein the upper layer (41) is composed of a first filler (31) containing silica sand as a main component, the middle layer (42) is composed of a second filler (32) containing chromite sand and silica sand as main components, the lower layer (43) is composed of a third filler (33) containing chromite sand and silica sand as main components, and the second filler (32) has fewer particles with coarse granularity than the third filler (33).
Inventors:
HOSOKAWA KOHEI (JP)
MATSUMOTO TAKUYA (JP)
SUGIHARA SATOHIKO (JP)
IDO HIROHARU (JP)
YOKOYAMA HIDEKI (JP)
KAMO MOMOKI (JP)
HARADA MASAAKI (JP)
MATSUMOTO TAKUYA (JP)
SUGIHARA SATOHIKO (JP)
IDO HIROHARU (JP)
YOKOYAMA HIDEKI (JP)
KAMO MOMOKI (JP)
HARADA MASAAKI (JP)
Application Number:
PCT/JP2021/037594
Publication Date:
June 02, 2022
Filing Date:
October 11, 2021
Export Citation:
Assignee:
JFE STEEL CORP (JP)
YAMAKAWA SANGYO CO LTD (JP)
YAMAKAWA SANGYO CO LTD (JP)
International Classes:
B22D41/46
Foreign References:
| KR20100096831A | 2010-09-02 | |||
| JP2005088020A | 2005-04-07 | |||
| JP2006297426A | 2006-11-02 | |||
| JPS57139466A | 1982-08-28 | |||
| KR20110108970A | 2011-10-06 | |||
| CN110496959A | 2019-11-26 |
Attorney, Agent or Firm:
TANAKA Hidetetsu et al. (JP)
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