Title:
REFINING VESSEL FOR HIGH TEMPERATURE MELT
Document Type and Number:
WIPO Patent Application WO/2020/203471
Kind Code:
A1
Abstract:
Provided is a refining vessel for a high temperature melt wherein a gas blowing nozzle is highly durable. The refining vessel for a high temperature melt is configured such that: the refractory material for the gas blowing nozzle comprises a central refractory in which metal tubules are embedded and an outer refractory surrounding the circumference of said central refractory; when the minimum radius of an imaginary circle that encompasses all of the embedded metal tubules in a plane surface of the refractory material for the gas blowing nozzle is R (mm), the external form of the central refractory has a shape encompassed between a circle that is concentric with the imaginary circle and has a radius of R+10 mm and a circle that is concentric with the imaginary circle and has a radius of R+150 mm; the central refractory is composed of a MgO-C refractory with a 30-80 mass% carbon content; and the outer refractory is composed of a MgO-C refractory with a 10-25 mass% carbon content.
Inventors:
HOSOHARA SEIJI (JP)
TORIGOE ATSUSHI (JP)
FUJIYOSHI RYOMA (JP)
TORIGOE ATSUSHI (JP)
FUJIYOSHI RYOMA (JP)
Application Number:
PCT/JP2020/013057
Publication Date:
October 08, 2020
Filing Date:
March 24, 2020
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21C5/48; F27D3/16
Foreign References:
| JP2016199788A | 2016-12-01 | |||
| JP2003261374A | 2003-09-16 | |||
| JP2011026643A | 2011-02-10 | |||
| JP3201678B2 | 2001-08-27 |
Other References:
See also references of EP 3929313A4
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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