METHOD FOR EVALUATING PEELING RESISTANCE OF ALUMINA-MAGNESIA QUALITY CASTABLE REFRACTORY

摘要

To provide a method for evaluating peeling resistance whether or not an alumina-magnesia quality castable refractory is peeled and worn during use in a lining furnace material of a molten-metal treatment container 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 in the atmosphere for 3 or more hours of 0% or more, includes: a step of heat-treating the castable refractory at a temperature of 1,400°C or higher and 1,600°C or lower in the atmosphere for 3 or more hours; a step of measuring a coefficient of linear thermal expansion to 1,600°C from a room temperature in the atmosphere of the castable refractory after firing; and a step of determining peeling resistance of an alumina-magnesia quality castable refractory to be evaluated on the basis of a value (%) obtained by subtracting a value of the coefficient of linear thermal expansion at 1,600°C from the maximum value of the coefficient of linear thermal expansion.SELECTED DRAWING: Figure 2