Unshaped refractories

Details Unshaped refractories Unshaped refractories

2005-06-23

2008-12-02

Group, Karl E (Department: 1793)

Compositions: ceramic

Ceramic compositions

Refractory

C501S122000, C501S124000

Reexamination Certificate

active

07459409

ABSTRACT:
Excellent characteristics concerning slag penetration-resistance, corrosion-resistance, and structural stability on usage of lining-refractory such as equipment for desiliconizing molten iron, a ladle for steel-making, a RH equipment are obtained. Unshaped refractories provide fine particles of under 0.75mm diameter, and aggregate of 0.75-10mm. Furthermore, the fine particles contain 10-35 mass % content of MgO, to the total mass % of the fine particles. Even furthermore, the sum total amount of MgO and Al2O3is more than 90 mass %, to the total mass % of the fine particle. Additionally, such fine particles has 5-40 mass % of particles made of periclase-spinel, as a source of MgO, to the total mass % of the unshaped refractories. And, the aggregate comprises at least one selected from the group consisting of particles made of alumina and particles made of spinel.

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patent: 4990475 (1991-02-01), Matsumoto et al.
patent: 5932506 (1999-08-01), Bogan
patent: 5972102 (1999-10-01), Vezza
patent: 6730159 (2004-05-01), Falaschi et al.
patent: 0 535 233 (1993-04-01), None
patent: 06 040774 (1994-02-01), None
patent: 11 310471 (1999-11-01), None
patent: 2004 307293 (2004-11-01), None

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