Title:
アルミナ−マグネシア質キャスタブル耐火物、及びその製造方法
Document Type and Number:
Japanese Patent JP6927054
Kind Code:
B2
Abstract:
To provide an alumina-magnesia castable refractory with excellent durability which suppresses the disappearance of the liquid phase formed inside the refractory during use and does not cause buckling.SOLUTION: An alumina-magnesia castable refractory of this invention comprises: 0.8 to 1.2% by mass of a silica powder having a maximum particle size of 1 μm or less; 4.0 to 7.0% by mass of a magnesia refractory material having a maximum particle size of less than 1 mm; 3.0 to 8.0% by mass of an alumina cement; and an alumina-based refractory material having a maximum particle size of less than 30 mm as the balance, based on 100 mass% of the refractory including the silica powder, the magnesia refractory material, the alumina cement, and the alumina refractory material, in which the alumina-based refractory raw material contains 5.0 to 15.0% by mass of particles having a particle size of 10 μm or more and 75 μm or less, based on 100% by mass of the refractory, and a granulated lump having a particle size of 0.3 mm or more and less than 1.0 mm, which is formed by the total amount of the alumina refractory raw material having a particle size of 10 μm or more and 75 μm or less and the total amount of the silica powder.SELECTED DRAWING: Figure 3
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Inventors:
Takeshi Matsui
Application Number:
JP2018004208A
Publication Date:
August 25, 2021
Filing Date:
January 15, 2018
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C04B35/101; B22D11/10; B22D41/02; C04B14/30; C04B22/06; C04B35/626; F27D1/00
Domestic Patent References:
| JP2016069219A | ||||
| JP2006045050A | ||||
| JP2004067446A | ||||
| JP9030859A | ||||
| JP2011241093A | ||||
| JP9012375A | ||||
| JP2003137663A | ||||
| JP2013173657A |
Foreign References:
| CN102320843A | ||||
| US20140261113 |
Attorney, Agent or Firm:
Atsushi Aoki
Shinji Mitsuhashi
Fukuchi Ritsuo
Manabu Saito
Masaharu Konoue
Shinji Mitsuhashi
Fukuchi Ritsuo
Manabu Saito
Masaharu Konoue