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Location: home >>Thermal Shock Resistance of Refractory Materials

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Thermal Shock Resistance of Refractory Material

Refractory material will be affected by the change of environmental temperature frequently in the using process. For example, in the pouring process of cast steel, charging, discharging and change of furnace temperature of metallurgical furnace lead to products crack, flake or even collapse, which not only limits the heating and cooling rate of kiln products and furnace, but also limits furnace operation. They are one of the main causes to faster damage of refractory brick and furnace.

A large number of refractory materials are sensitive to thermal shock, which means that sudden changes of temperature can lead to failure. Thermal shock resistance is refers to the resistance performance of refractory materials. Detection method is to sharp alternate the product environment temperature and record the times of undamaged. 

Physical properties are the main reason effect thermal shock resistance, such as thermal expansion, and thermal conductivity etc. Generally speaking, the bigger the thermal expansion rate, the poorer the thermal shock resistance. In addition, refractory organization structure, grain composition and the shape of refractory materials affect thermal shock resistance.
Thermal shock resistance of common refractory material:
 
Type
Heating Temperature/℃
Cooling way
Times
Alumina Cement
1100
Water
15~20
Phosphoric Acid
1100
Water
180~220
Water Glass
850
Water
50~60
Portland Cement
1100
Water
10~17 

 

 

 
 

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