Fire resistance of refractory

时间：2015-06-24 Refractoriness refers to the refractory material resistance to high temperature at no load without melting and softening properties. The significance of fire resistance is different from the melting point, the melting point is the crystallization of pure substances and its liquid phase is in equilibrium state. Since refractory materials are generally composed of a variety of mineral mixtures, the melting is carried out in a certain range.
The chemical composition, mineral composition and the distribution and the combination of the refractory materials have a decisive influence on the fire resistance. All kinds of impurity especially the impurities have strong flux effect, will seriously reduce the material refractoriness. Therefore, improving the purity of raw materials, strict control of impurity content is a very important process measures to improve the degree of fire resistance.
Due to the refractory material in practical use, except by the function of high temperature, but also by the erosion of all kinds of loads and the role of various erosion media service environment is very complex, so refractoriness cannot as refractory in the temperature of the upper limit.
The fire resistance is the basis for judging whether the material can be used as a refractory material. The international standard organization provides that the fire resistance of the inorganic non metallic materials is more than 1500.