SILICEOUS REFRACTORY BRICK AND METHOD FOR PRODUCING THE SAME
PROBLEM TO BE SOLVED: To provide a refractory brick more suitable for the lining of a coke oven, and a method for producing the same.SOLUTION: Provided is a siliceous refractory brick characterized in that the composition of raw materials is composed of a molten quartz material of 85 to 95 wt.%, a q...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a refractory brick more suitable for the lining of a coke oven, and a method for producing the same.SOLUTION: Provided is a siliceous refractory brick characterized in that the composition of raw materials is composed of a molten quartz material of 85 to 95 wt.%, a quartz material of 5 to 15 wt.% and a clay material including at least a half quantity of bentonite of 3 to 5 wt.%. The firing temperature in its production method is 1,000 to 1,300°C. Regarding the refractory brick as a product, its porosity is 20% or lower, its compressive strength is 25 MPa or lower, and its hot thermal expansion when being heated from 20°C to 1,000°C reaches 0.5% or lower.SELECTED DRAWING: None
【課題】コークス炉の内張りにより好適な耐火煉瓦とその製造方法とを提供すること。【解決手段】本発明の珪石質耐火煉瓦では、原料の組成が、溶融石英質材85〜95重量%と、石英質材5〜15重量%と、少なくとも半量のベントナイトを含む粘土質材3〜5重量%とであることを特徴とする。その製造方法での焼成温度は、1000〜1300℃である。製品としての耐火煉瓦は、その気孔率が20%以下であり、その圧縮強さが25MPa以上であって、20℃から1000℃まで加熱した際のその熱間線膨張は0.5%以下になる。【選択図】なし |
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