How much do you know about the thermal shock stability of the refractory material?
The stability of thermal shock refers to the performance of the rapid change of temperature within a certain temperature range within a certain temperature range, and does not cause damage, also known as “resistance to cold and emergency heat”. Many of the operating methods of industrial furnaces are intermittent operations. In the intermittent furnace, the refractory product is due to the influence of the temperature of the temperature sharply during the production and use of refractory products.
02. Three detection methods for thermal shock performance
There are three types of detection methods for detecting thermal shock stability of refractory materials. The water -cooled detection method is to heat the material to the specified temperature and meet the requirements of the thermal insulation conditions. Put the sample directly in the cold water to the normal temperature until the sample is damaged.
The air -cooled detection method is to heat the material to the prescribed temperature and meet the requirements of the thermal insulation conditions, and directly cool the material in the air to the normal temperature until the sample is damaged.
After the air -cooled detection method is to heat the material to the specified temperature and meet the requirements of the thermal insulation conditions, the sample is directly placed in the compressed air with fixed pressure and the flow of the flow to cool to the normal temperature until the sample is damaged.
03. Method of improving the stability of thermal shock
The stability of thermal shock is one of the main performance indicators of refractory materials. For all refractory materials, the higher the number of thermal shock stability of the refractory material, the better. Under normal circumstances, in the aluminum -silicon refractory material, the thermal shock stability of red pillars and Mo Lai stone materials is higher than that of Gang Jade refractory material, and the heat seismic stability containing spine -resistant refractory materials is higher than that of magnesium refractory materials Essence Under the same material conditions, the higher the density of the material, the worse the stability of the thermal shock; the higher the granular thermal conductivity, the smaller the internal stress, the better the thermal shock stability, and the thermal earthquake stability of carbon -resistant materials is higher than that Aluminum silicon refractory material.
The thermal shock stability of the refractory material is related to the characteristics of the material and the granular matching and the crystal structure. In order to obtain a good thermal shock stability, the production ingredients of refractory materials often use different materials and grades for composite formulation. In order to cause micro -cracks due to inconsistent expansion of refractory products due to the inconsistent expansion of the material, and using these micro -cracks to offset the expansion stress and contraction stress of the material during use, to improve the stability of the thermal shock.
