There are many varieties of refractory materials on the market, but the quality is similar, but the quotations are uneven. The primary reason why we can find refractory materials in such a market is that we do not understand how to distinguish high-quality refractories.

　　 How to distinguish refractory materials very well has always been a difficult problem for this profession. In recent years, although the inspection methods and skills of refractory materials and products have been continuously improved and progressed, the test conditions of the laboratory are not completely consistent with the practical use conditions, resulting in the test results under the specific conditions of the laboratory, which cannot predict the refractory The operating function of the material in practical application and the inference of its service life. However, the current testing method can still be used as a useful method for judging the quality of refractory materials. After testing, it can check the quality of the factory output and check whether the incoming data meets the required standards, determine the quality of the materials, control the production process, study the properties of the products after use, and seek ways to improve and improve the quality.

　　 Refractory materials are subjected to physical, chemical, and mechanical effects at high temperatures during use. They simply melt and soften, or are corroded, corroded, or cracked and damaged, causing the operation to stop and contaminate the material. Therefore, refractory materials are required to have properties that can be used to various operating conditions. The quality of refractory materials depends on its nature. It is a criterion for evaluating the quality of the system. In production, it is the basis for drawing up and improving the production process to check whether the production process is correct and stable. The correct and reasonable selection of refractory materials is also based on their properties.