Take breathable brick as an example, briefly describe the basic knowledge of refractory materials
Taking brick as an example, this article discusses the basic knowledge of refractories from four aspects: thermal conductivity, specific heat capacity, refractoriness, and load softening temperature.
Thermal conductivity of refractory materials: Thermal conductivity indicates the thermal conductivity of a substance. The greater the thermal conductivity, the better the thermal conductor. The density of ladle air-permeable bricks is larger, and the thermal conductivity is correspondingly larger.
Specific heat capacity of refractory material: Specific heat capacity represents the heat absorption or heat dissipation capacity of an object. The larger the specific heat capacity, the stronger the corresponding heat absorption or heat dissipation capacity. The specific heat capacity of air-permeable bricks is related to its baking and cooling time.
Refractoriness of refractory materials: As mentioned in the previous article, it is a technical index that integrates the chemical composition, dispersion, proportion and viscosity of the liquid phase contained in the material. Refractoriness is one of the important indicators of refractory materials. When used, refractory materials need to be able to withstand the high temperature of the use scene. For breathable bricks, if the temperature of molten steel is too high, it will not only affect the life of the breathable bricks, but even cause major leaks. accident.
The load softening temperature of refractory material: It indicates the resistance of the material to high temperature and load at the same time. Refractory products have high compressive strength at room temperature, but after being loaded at high temperatures, they will deform and reduce their compressive strength.
(Picture) Castable for blast furnace iron trough
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