Cement kiln refractory castables are as follows: alkaline castable, high-silica castable, high-alumina castable.
1, alkaline castable refers to magnesia, magnesia-alumina spinel-based material of a castable. Such materials are particularly good anti-alkaline, the inadequacies of thermal expansion coefficient is large, thermal shock resistance is poor, such as to solve the thermal shock problem, the application effect in the cement kiln is not
Incorrect.
2, high-silica castable Refers to the alumina content of less than 30% of the aluminosilicate material, such materials at a certain temperature and kiln materials and kiln gas in the alkali compound reaction in the material surface to form a closed Dense protective glaze layer, to prevent the continued infiltration of alkali,
Thereby protecting the material is no longer continue to be alkaline erosion, the formation of good resistance to alkaline. However, the weakness of these materials is the soft charge temperature is low, low strength, poor wear resistance.
3, high-alumina castable is mainly composed of alumina formed by a class of materials. Mainly include various corundum mullite and so on. The common characteristics of these materials are high hardness, high wear resistance, the inadequacies are not alkali, because the alumina and (K, Na) 2O reaction can form β-oxygen
Aluminum, resulting in volume expansion, destruction of material structure, when there are silica materials can form nepheline, not only the volume expansion, and the lower melting point, the use of performance dropped significantly.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing’s product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.