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METHOD FOR EVALUATING PEELING RESISTANCE OF ALUMINA-MAGNESIA QUALITY CASTABLE REFRACTORY
To provide a method for evaluating peeling resistance whether or not an alumina-magnesia quality castable refractory is peeled and worn.SOLUTION: A method for evaluating peeling resistance of an alumina-magnesia quality castable refractory in which the refractory has a residual linear change ratio after having been fired at 1,400°C or higher and 1,600°C or lower for 3 or more hours of 0% or more, includes: a step of heat-treating the castable refractory at a temperature T1 equal to or higher than a temperature at which a liquid phase of the refractory is generated for 3 or more hours; a step of measuring a coefficient of linear thermal expansion of the refractory while raising the refractory after heat treatment to a temperature T2 higher than the temperature T1 from a room temperature; a step of measuring a coefficient of linear thermal expansion of the refractory while cooling the refractory to the room temperature from the temperature T2; a step of calculating a differential value between the coefficient of linear thermal expansion in the temperature-raising step and the coefficient of linear thermal expansion in the cooling step at a temperature T3 equal to or lower than the T1; and a step of determining peeling resistance from the differential value.SELECTED DRAWING: Figure 1
【課題】アルミナ−マグネシア質キャスタブル耐火物が剥離損耗するか否かの耐剥離性を評価する方法を提供する。【解決手段】アルミナ−マグネシア質キャスタブル耐火物の耐剥離性の評価方法であって、前記耐火物は、１４００℃以上１６００℃以下で３時間以上焼成後の残存線変化率が０％以上であり、前記耐火物の液相が生成する温度以上の温度Ｔ１にて前記キャスタブル耐火物を３時間以上熱処理する工程と、前記熱処理後の耐火物を、室温から前記温度Ｔ１よりも高い温度Ｔ２まで昇温しつつ前記耐火物の線熱膨張率を測定する工程と、前記温度Ｔ２から室温まで冷却しつつ、前記耐火物の線熱膨張率を測定する工程と、前記Ｔ１以下の温度Ｔ３における前記昇温過程の線熱膨張率と前記冷却過程の線熱膨張率との差分値を算出する工程と、前記差分値から耐剥離性を判断する工程と、を備える。【選択図】図１
METHOD FOR EVALUATING PEELING RESISTANCE OF ALUMINA-MAGNESIA QUALITY CASTABLE REFRACTORY
To provide a method for evaluating peeling resistance whether or not an alumina-magnesia quality castable refractory is peeled and worn.SOLUTION: A method for evaluating peeling resistance of an alumina-magnesia quality castable refractory in which the refractory has a residual linear change ratio after having been fired at 1,400°C or higher and 1,600°C or lower for 3 or more hours of 0% or more, includes: a step of heat-treating the castable refractory at a temperature T1 equal to or higher than a temperature at which a liquid phase of the refractory is generated for 3 or more hours; a step of measuring a coefficient of linear thermal expansion of the refractory while raising the refractory after heat treatment to a temperature T2 higher than the temperature T1 from a room temperature; a step of measuring a coefficient of linear thermal expansion of the refractory while cooling the refractory to the room temperature from the temperature T2; a step of calculating a differential value between the coefficient of linear thermal expansion in the temperature-raising step and the coefficient of linear thermal expansion in the cooling step at a temperature T3 equal to or lower than the T1; and a step of determining peeling resistance from the differential value.SELECTED DRAWING: Figure 1
【課題】アルミナ−マグネシア質キャスタブル耐火物が剥離損耗するか否かの耐剥離性を評価する方法を提供する。【解決手段】アルミナ−マグネシア質キャスタブル耐火物の耐剥離性の評価方法であって、前記耐火物は、１４００℃以上１６００℃以下で３時間以上焼成後の残存線変化率が０％以上であり、前記耐火物の液相が生成する温度以上の温度Ｔ１にて前記キャスタブル耐火物を３時間以上熱処理する工程と、前記熱処理後の耐火物を、室温から前記温度Ｔ１よりも高い温度Ｔ２まで昇温しつつ前記耐火物の線熱膨張率を測定する工程と、前記温度Ｔ２から室温まで冷却しつつ、前記耐火物の線熱膨張率を測定する工程と、前記Ｔ１以下の温度Ｔ３における前記昇温過程の線熱膨張率と前記冷却過程の線熱膨張率との差分値を算出する工程と、前記差分値から耐剥離性を判断する工程と、を備える。【選択図】図１
METHOD FOR EVALUATING PEELING RESISTANCE OF ALUMINA-MAGNESIA QUALITY CASTABLE REFRACTORY
アルミナ−マグネシア質キャスタブル耐火物の耐剥離性の評価方法
MATSUI TSUYOSHI (author)
2020-04-16
Patent
Electronic Resource
Japanese
METHOD FOR EVALUATING PEELING RESISTANCE OF ALUMINA-MAGNESIA QUALITY CASTABLE REFRACTORY
| European Patent Office | 2020
METHOD FOR EVALUATING PEELING RESISTANCE OF ALUMINA-MAGNESIA QUALITY CASTABLE REFRACTORY
| European Patent Office | 2020
METHOD FOR EVALUATING PEELING RESISTANCE OF ALUMINA-MAGNESIA QUALITY CASTABLE REFRACTORY
| European Patent Office | 2020