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GRAPHITE-CONTAINING REFRACTORY
To provide a graphite-containing refractory in which the spread of crack generating by heat stress is suppressed, and high durability is obtained even when it is used under such a condition that the temperature rising and dropping are repeated for a long term like the lining refractory of a converter, or that an inside temperature gradient is extremely large, particularly like a tuyere brick of the converter.SOLUTION: There is provided a graphite-containing refractory in which a carbon fiber fabric y of 40 to 1,300 g in mass per 1 m2 is adhered to at least a part of the surface of a refractory body x having a graphite content of 1 to 80 mass% via an adhesive-hardening material a. The difference between the thermal expansion coefficient of the adhesive-hardening material a and that of the refractory body x when rising a temperature from normal temperature to 1,000°C is 2.0% or less, and the difference between the residual expansion coefficient of the adhesive-hardening material a and that of the refractory body x when lowering the temperature from 1,000°C to the normal temperature is also 2.0% or less.SELECTED DRAWING: Figure 1
【課題】転炉の内張り耐火物のように長期間にわたって昇温と降温が繰り返される条件で使用される場合でも、熱応力により発生する亀裂の進展が抑制されて高い耐用性が得られ、また、特に転炉の羽口煉瓦のように内部の温度勾配が非常に大きい条件で使用される場合でも、高い耐用性が得られる黒鉛含有耐火物を提供する。【解決手段】黒鉛含有量が１〜８０質量％の耐火物本体xの表面の少なくとも一部に、１ｍ２当たりの質量が４０〜１３００ｇの炭素繊維織物yが接着剤硬化物aを介して接着された黒鉛含有耐火物であって、常温から１０００℃まで昇温させたときの接着剤硬化物aの熱膨張率と耐火物本体xの熱膨張率の差が２．０％以下、１０００℃から常温まで降温させたときの接着剤硬化物aの残存膨張率と耐火物本体xの残存膨張率の差が２．０％以下である。【選択図】図１
GRAPHITE-CONTAINING REFRACTORY
To provide a graphite-containing refractory in which the spread of crack generating by heat stress is suppressed, and high durability is obtained even when it is used under such a condition that the temperature rising and dropping are repeated for a long term like the lining refractory of a converter, or that an inside temperature gradient is extremely large, particularly like a tuyere brick of the converter.SOLUTION: There is provided a graphite-containing refractory in which a carbon fiber fabric y of 40 to 1,300 g in mass per 1 m2 is adhered to at least a part of the surface of a refractory body x having a graphite content of 1 to 80 mass% via an adhesive-hardening material a. The difference between the thermal expansion coefficient of the adhesive-hardening material a and that of the refractory body x when rising a temperature from normal temperature to 1,000°C is 2.0% or less, and the difference between the residual expansion coefficient of the adhesive-hardening material a and that of the refractory body x when lowering the temperature from 1,000°C to the normal temperature is also 2.0% or less.SELECTED DRAWING: Figure 1
【課題】転炉の内張り耐火物のように長期間にわたって昇温と降温が繰り返される条件で使用される場合でも、熱応力により発生する亀裂の進展が抑制されて高い耐用性が得られ、また、特に転炉の羽口煉瓦のように内部の温度勾配が非常に大きい条件で使用される場合でも、高い耐用性が得られる黒鉛含有耐火物を提供する。【解決手段】黒鉛含有量が１〜８０質量％の耐火物本体xの表面の少なくとも一部に、１ｍ２当たりの質量が４０〜１３００ｇの炭素繊維織物yが接着剤硬化物aを介して接着された黒鉛含有耐火物であって、常温から１０００℃まで昇温させたときの接着剤硬化物aの熱膨張率と耐火物本体xの熱膨張率の差が２．０％以下、１０００℃から常温まで降温させたときの接着剤硬化物aの残存膨張率と耐火物本体xの残存膨張率の差が２．０％以下である。【選択図】図１
GRAPHITE-CONTAINING REFRACTORY
黒鉛含有耐火物
YOSHIDA KEISUKE (author) / KONDO DAISUKE (author) / MATSUNAGA HISAHIRO (author)
2020-10-01
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
/
B32B
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
,
Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse
/
C21C
Weiterverarbeiten von Roheisen, z.B. Feinen, Herstellen von Schweißeisen oder Stahl
,
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL
/
F27D
Einzelheiten oder Zubehör für Industrieöfen, Schachtöfen, Brennöfen oder Retorten, soweit sie nicht auf eine Ofenart eingeschränkt sind
,
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
GRAPHITE-CONTAINING REFRACTORY AND METHOD OF PRODUCING GRAPHITE-CONTAINING REFRACTORY
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