A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
METHOD FOR PRODUCTION OF GRAPHITE-CONTAINING REFRACTORY
To provide a production method for a graphite-containing refractory in which the spread of crack generating by heat stress is suppressed and high durability is obtained even in the use under such conditions that temperature rising and lowering are repeated for a long term like a lining refractory of a converter and further, even in the use such a condition that an inside temperature gradient is extremely large.SOLUTION: A graphite-containing refractory is produced by bonding a carbon fiber fabric y having 40-1,300 g in mass per 1 m2 to at least a part of the surface in the molding body x0 of a refractory raw material having a graphite content of 1-80 mass% via an adhesive a0, and further bonding the fabric y to at least a part of the surface of refractory body x composed of the molding body x0 via an adhesive-hardening material a composed of the adhesive a0. The difference between the thermal expansion coefficient of the adhesive-hardening material a and that of the refractory body x at temperature rising from normal temperature to 1,000°C is 2.0% or less, and the difference between the residual expansion rate of the adhesive-hardening material a and that of the refractory body x at temperature lowering from 1,000°C to 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、さらには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、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る黒鉛含有耐火物の製造法を提供する。【解決手段】黒鉛含有量が１〜８０質量％の耐火物原料の成型体x０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を接着剤a０を介して接着し、成型体x０で構成される耐火物本体xの表面の少なくとも一部に、接着剤a０で構成される接着剤硬化物aを介して炭素繊維織物yが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％以下である黒鉛含有耐火物を得る。【選択図】図１
METHOD FOR PRODUCTION OF GRAPHITE-CONTAINING REFRACTORY
To provide a production method for a graphite-containing refractory in which the spread of crack generating by heat stress is suppressed and high durability is obtained even in the use under such conditions that temperature rising and lowering are repeated for a long term like a lining refractory of a converter and further, even in the use such a condition that an inside temperature gradient is extremely large.SOLUTION: A graphite-containing refractory is produced by bonding a carbon fiber fabric y having 40-1,300 g in mass per 1 m2 to at least a part of the surface in the molding body x0 of a refractory raw material having a graphite content of 1-80 mass% via an adhesive a0, and further bonding the fabric y to at least a part of the surface of refractory body x composed of the molding body x0 via an adhesive-hardening material a composed of the adhesive a0. The difference between the thermal expansion coefficient of the adhesive-hardening material a and that of the refractory body x at temperature rising from normal temperature to 1,000°C is 2.0% or less, and the difference between the residual expansion rate of the adhesive-hardening material a and that of the refractory body x at temperature lowering from 1,000°C to 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、さらには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、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る黒鉛含有耐火物の製造法を提供する。【解決手段】黒鉛含有量が１〜８０質量％の耐火物原料の成型体x０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を接着剤a０を介して接着し、成型体x０で構成される耐火物本体xの表面の少なくとも一部に、接着剤a０で構成される接着剤硬化物aを介して炭素繊維織物yが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％以下である黒鉛含有耐火物を得る。【選択図】図１
METHOD FOR PRODUCTION OF GRAPHITE-CONTAINING REFRACTORY
黒鉛含有耐火物の製造方法
YOSHIDA KEISUKE (author) / KONDO DAISUKE (author) / MATSUNAGA HISAHIRO (author) / FUJIYOSHI RYOMA (author) / TOMITANI NAOSHI (author)
2020-10-01
Patent
Electronic Resource
Japanese
Graphite-containing refractory and method of producing graphite-containing refractory
| European Patent Office | 2021
GRAPHITE-CONTAINING REFRACTORY AND METHOD OF PRODUCING GRAPHITE-CONTAINING REFRACTORY
| European Patent Office | 2021
GRAPHITE-CONTAINING REFRACTORY AND METHOD OF PRODUCING GRAPHITE-CONTAINING REFRACTORY
| European Patent Office | 2019
Graphite-containing refractory and method of producing graphite-containing refractory
| European Patent Office | 2023