Although the fire brick is good, the structure is relatively stable, but the refractory brick used for a period of time, some customers reflect the surface of the refractory brick cracks, which is what causes it? After many years of research and experience, the main reason is that the surface of the refractory brick is four points. Today’s technical staff for you to read. 1, the raw material itself is dry and sensitive coefficient The drying coefficient of raw material is the possibility of cracking of the product, the higher the drying coefficient is, the more easily the product is cracked, the lower the coefficient is, and the more difficult the product is. So we must be careful when choosing raw materials, as far as possible to choose dry sensitive coefficient of raw materials. 2, inappropriate production measures Production without attention to the ratio of raw materials, if the mix is not uniform will cause the product crack, which requires us to pay attention in the production of the source, to avoid cracking in the future. 3, dry reasons The air temperature is too high, and the furnace preheating is too short and the ventilation quantity is too large, so the reason of the crack is caused by the fire. 4, roasting reasons A gate is not reasonable, the fire cooling too fast, too fast, will lead to uneven heating, it will cause cracks in refractory brick. Above brick appear on the surface of the crack by Xinmi Changxing refractory to provide you with, more on the refractory brick consulting; please pay attention to our website.