About thermal shock resistance of ceramic filter plates
About thermal shock resistance of ceramic filter plates
Thermal shock resistance refers to the resistance of foam ceramic filter plates to damage caused by rapid temperature changes. During the use of the foam ceramic filter plate, we require the user to start the filtration when the filter plate is gradually preheated to the temperature of the filtered aluminum melt before use, but some users do not follow this well when using it. It is stipulated that after the filter plate is placed, the melt is filtered without preheating, so that the filter plate is required to have a certain thermal shock resistance. The better the thermal shock resistance, the more durable the filter plate and the better the quality. Welcome to the company's official website http://
For the determination of the thermal shock resistance of the filter plate, we are in the People's Republic of China industry standard "Test method for thermal shock resistance of refractory products" ( YB4018-91 ) and the ferrous metallurgical industry standard of the People's Republic of China "Test for thermal shock resistance of refractory products" The method (air quenching method) ( YB/T376.2-1995 ) is based on the characteristics of the foam ceramic filter plate.
The basic process of the test method is to preheat the furnace to 740±10 °C (the filtration temperature of the aluminum and aluminum alloy melt is generally 720±10 °C ). After the heat is kept for 15 minutes , the sample to be tested is quickly moved into the furnace. And keep it for 30min . Then open the furnace door, quickly remove the sample from the furnace, and let it be exposed to the air to cool naturally. After repeating this process for 5 times, observe whether the sample has appearance defects such as breakage, breakage and cornering. Any of them indicates that the thermal shock resistance of the product is not good, and vice versa. 　　
In this standard, products that have undergone five thermal shock processes without appearance defects such as breakage, breakage and cornering are products that are resistant to thermal shock.
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