Introduction of casting material The pouring material is also called the refractory casting material, which is made from the refractory material by adding a certain amount of binder. With high fluidity, the refractory material is suitable to be formed by casting method. Compared with other unshaped refractory material, binder and higher moisture content, liquidity better, and therefore not stereotypes refractory material has wide application scope, under the conditions of use of the material and binder to be selected. Can be directly cast into the use of the lining, and can be used as a method of pouring or earthquake in the use of prefabricated blocks. Classification of refractory casting materials Refractory materials are divided into refractory materials and refractory materials. Unshaped refractory castable is composed of a variety of aggregate or aggregate and one or more viscous agent and mixed powder particles and must be used and a or a plurality of liquid with stirring evenly, with strong liquidity and plasticity. Type of casting material According to the porosity ratio, binder and aggregate variety. In practice, the use of temperature or functional features are often used to classify. According to the porosity ratio: there are dense refractory pouring material and porosity rate of not less than 45% of the heat insulation refractory burning note two kinds of. According to the bond points: there is a combination of water hardness, chemical binding, condensation combined with refractory pouring material. Hard binding casting material at room temperature condensation hardening and through hydration and hardening, the main varieties of Portland cement, ordinary calcium aluminate cement, pure calcium aluminate cement, electric melting pure calcium aluminate cement casting material, etc.. Chemical combination of casting materials at room temperature generally through the addition of hardening agent to form a chemical reaction and hardening, the main varieties of water glass, aluminum sulfate, phosphate casting materials, etc.. In the process of sintering, the aggregate and the casting materials are hardened by sintering, the main varieties are clay casting materials, etc.. According to the refractory aggregate: clay aggregate (Al2O3 30% ~ 45%), high alumina (Al2O3%26ge; 45%) aggregate, siliceous aggregate (SiO2%26ge; 85%, Al2O3%26lt 10%) alkaline aggregate (magnesite and dolomite), a special aggregate carbon, carbides, spinel, zircon, nitride and insulation aggregate (perlite, vermiculite, ceramsite, cenosphere, light sand brick, porous chamotte, alumina hollow ball). Construction of pouring material
