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Title:
REFRACTORY BRICK
Document Type and Number:
WIPO Patent Application WO/2007/061070
Kind Code:
A1
Abstract:
A refractory brick which has durability equal to that of alumina-magnesia casting materials and is suitable for use especially as a ladle for steelmaking. For producing the refractory brick, a raw alumina material and a raw magnesia material at least 90 mass% of which is accounted for by fine particles of 0.5 mm or smaller are used. The brick has a total content of Al2O3 and MgO of 90 mass% or higher, MgO content of 4-16 mass%, SiO2 content of 0.5-5 mass%, and total content of Na2O and K2O of 0.3-2 mass%, with the remainder being unavoidable impurities and Al2O3. It is obtained by press-molding a raw-material mixture and then heating the molding at 100-1,150°C.

Inventors:
NAKAMURA RYOSUKE
SHIKAMA HIROYUKI
TOMIYA HISASHI
SASAKI HISAHARU
Application Number:
JP2006/323480
Publication Date:
May 31, 2007
Filing Date:
November 24, 2006
Export Citation:
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Assignee:
SHINAGAWA REFRACTORIES CO (JP)
NAKAMURA RYOSUKE
SHIKAMA HIROYUKI
TOMIYA HISASHI
SASAKI HISAHARU
International Classes:
C04B35/101; F27D1/00
Foreign References:
JPH08109062A1996-04-30
JP2000272956A2000-10-03
JP2003145265A2003-05-20
JPH09328357A1997-12-22
JP2000119061A2000-04-25
Other References:
See also references of EP 1955987A4
Attorney, Agent or Firm:
NAITO, Teruo (7-13 Nishi-Shimbashi 1-chom, Minato-ku Tokyo, JP)
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