Different Classification Of Refractory Materials

     According to Common and special classification classified into common and special refractory two categories. Ordinary refractory is used for metallurgical furnace, cement kiln, glass kiln and other hot kiln furnace lining of conventional products, mostly from natural raw materials processing. Ordinary refractories are divided into acidic, neutral and alkaline by chemical properties. Special refractory is a new kind of inorganic nonmetal material developed on the basis of traditional ceramic and general refractories. Special refractory materials are of high purity, and are oxides, compounds and high-temperature composites for special kilns, smelting blast furnaces and other special parts.Refractory Materials
     Special Oxide refractory products have alumina, lanthanum oxide, beryllium oxide, calcium oxide, zirconia, uranium oxide, magnesium oxide, cerium oxide and thorium oxide, melting point in 2050~3050℃. Refractory products of special compounds have carbide (sic, titanium carbide, tantalum carbide and so on), nitride (boron nitride, silicon nitride, etc.), boride (boron silicide, boron-titanium, boron-hafnium, etc.), silicide (molybdenum silicide, etc.) and sulfide (sulfide thorium, cerium sulfide, etc.). Their melting point is 2000~3887℃, the hardest to melt is carbide. Special High-temperature composite refractory products are mainly metal ceramics, high-temperature inorganic coatings and fiber reinforced ceramics.Refractory Materials
      According to whether the classification of stereotypes, according to the product delivery before the shape of the factory into stereotypes and uncertain products. All called bricks are stereotyped products. All kinds of pouring material, filling burden, ramming material, fire mud and so on are variable-type products. (1) Stereotypes products can be divided into compact and heat-insulating type. Refractory bricks belong to compact products, although concrete is a stereotyped delivery products, but it belongs to the unshaped products.Refractory Materials
      Stereotypes products in accordance with the shape of the product can be divided into blocks (standard bricks, special-shaped bricks, etc.), special shape (crucible, casing bowl, pipe, etc.), fiber-like (aluminum silicate, zirconia and boron carbide, etc.). (2) The unshaped refractory is a new type refractory without calcination, its fire resistance is not less than 1580 ℃. The unshaped refractory material is composed of a mixture of refractory aggregate and powder, binder or other admixture, and can be used directly or with suitable liquid. such as refractory mud, watering materials and ramming materials.Refractory Materials
      According to the fire resistance classification of refractory materials by a variety of minerals, a variety of minerals have their own melting point, at high temperatures they or coexistence, or the formation of third-party minerals, the emergence of low eutectic melting temperature. The fire resistance is the temperature in the low eutectic melting state, but higher than the low eutectic temperature. The higher the index of fire resistance. It shows that the better the resistance to high temperature, the higher the refractory index will be divided into "ordinary", "advanced" and "Super" three files. According to the main crystalline phase of refractories, the so-called main components are the first phase and the second phase of the composition, the content accounted for about 90% of the total chemical composition. Modern refractory technology has developed more and more material ingredients, so the second phase and the third phase component can be used to produce new technology, which is more common in chemical composition than the first phase classification limitation.Refractory Materials