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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 when being used in a molten steel ladle before actual construction.SOLUTION: A method for evaluating peeling resistance of an alumina-magnesia quality castable refractory in which the castable refractory has a residual linear change ratio after having been fired at a temperature of 1,400°C or higher and 1,600°C or lower for 24 or more hours of 0% or more, includes: a step of measuring coefficients (%) of linear thermal expansion at 1,400°C, 1,500°C and 1,600°C of a test piece for thermal expansion measurement prepared using a kneaded product of a refractory raw material and water passing a sieve with a sieve opening of 2.8 mm in the kneaded product; and a step of determining that the castable refractory indicating the value of the coefficient (%) of linear thermal expansion at 1,500°C equal to or higher than the coefficient (%) of linear thermal expansion at 1,400°C and the value of the coefficient (%) of linear thermal expansion at 1,600°C equal to or higher than the coefficient (%) of linear thermal expansion at 1,500°C has high peeling resistance.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、溶鋼取鍋に用いられた場合に剥離損耗するか否かの耐剥離性を、実際の施工前に評価する方法を提供する。【解決手段】１４００℃以上１６００℃以下の温度で２４時間以上焼成後の残存線変化率が０％以上であるアルミナ‐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、前記耐火物原料と水との混練物のうち、目開き２．８ｍｍの篩を通過する混練物を用いて作製される熱膨張測定用試験片に対して、１４００℃、１５００℃、１６００℃のそれぞれにおける線熱膨張率（％）を測定する工程と、１５００℃における前記線熱膨張率（％）の値が１４００における前記線熱膨張率（％）の値以上を示し、かつ、１６００℃における前記線熱膨張率（％）の値が１５００℃における前記線熱膨張率（％）の値以上を示す前記キャスタブル耐火物は、耐剥離性が高いと判断する。【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 when being used in a molten steel ladle before actual construction.SOLUTION: A method for evaluating peeling resistance of an alumina-magnesia quality castable refractory in which the castable refractory has a residual linear change ratio after having been fired at a temperature of 1,400°C or higher and 1,600°C or lower for 24 or more hours of 0% or more, includes: a step of measuring coefficients (%) of linear thermal expansion at 1,400°C, 1,500°C and 1,600°C of a test piece for thermal expansion measurement prepared using a kneaded product of a refractory raw material and water passing a sieve with a sieve opening of 2.8 mm in the kneaded product; and a step of determining that the castable refractory indicating the value of the coefficient (%) of linear thermal expansion at 1,500°C equal to or higher than the coefficient (%) of linear thermal expansion at 1,400°C and the value of the coefficient (%) of linear thermal expansion at 1,600°C equal to or higher than the coefficient (%) of linear thermal expansion at 1,500°C has high peeling resistance.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、溶鋼取鍋に用いられた場合に剥離損耗するか否かの耐剥離性を、実際の施工前に評価する方法を提供する。【解決手段】１４００℃以上１６００℃以下の温度で２４時間以上焼成後の残存線変化率が０％以上であるアルミナ‐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、前記耐火物原料と水との混練物のうち、目開き２．８ｍｍの篩を通過する混練物を用いて作製される熱膨張測定用試験片に対して、１４００℃、１５００℃、１６００℃のそれぞれにおける線熱膨張率（％）を測定する工程と、１５００℃における前記線熱膨張率（％）の値が１４００における前記線熱膨張率（％）の値以上を示し、かつ、１６００℃における前記線熱膨張率（％）の値が１５００℃における前記線熱膨張率（％）の値以上を示す前記キャスタブル耐火物は、耐剥離性が高いと判断する。【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
MIYAMOTO SHO (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