What is the thermal shock resistance of high alumina bricks during use? It is often affected by rapid changes in ambient temperature. For example, during the pouring process of steel ladle lining bricks for cast steel, the feeding of metallurgical furnaces, converters, open hearth furnaces, or electric furnaces, etc.), steel tapping or changes in furnace temperature during operation, etc. Cracks, peeling and even collapse occur.
High alumina bricks destructive effect not only limits the heating and cooling rate of products and kilns, and limits the strengthening of furnace operations, but is also one of the main reasons for damage to products and kilns.
Thermal shock resistance refers to the resistance of refractory products to damage caused by rapid temperature changes. This kind of performance is also called temperature sudden change resistance. The inspection method is to change the environment where the product is located, and record the number of times that it is not damaged.
High alumina bricks main reason that affects the thermal shock resistance of products is the physical properties of the products, such as thermal expansion and thermal conductivity. Generally speaking, the greater the thermal expansion rate of the product, the worse the shock resistance. The higher the thermal conductivity of the product, the better the thermal shock stability. In addition, the structure of the refractory material, the particle composition and the shape of the product are all resistant to Thermal shock has an effect.
