There are various types of refractory materials, which are usually divided into ordinary refractory materials (1580-1770 ℃), high-grade refractory materials (1770-2000 ℃), and special refractory materials (above 2000 ℃) based on their fire resistance; Classified by chemical properties into acidic refractory materials, neutral refractory materials, and alkaline refractory materials; According to mineral composition, it can be divided into silica, aluminum silicate, magnesium, dolomite, olivine, spinel, carbonaceous, zirconium containing refractory materials, and special refractory materials; According to manufacturing methods, it can be divided into natural ores and artificial products; According to their shape, they can be divided into block shaped products and amorphous refractory materials; According to heat treatment methods, it can be divided into non fired products, fired products, and cast products; According to their fire resistance, they can be divided into ordinary refractory materials, high-grade refractory materials, and special refractory materials; According to their chemical properties, they can be divided into acidic refractory materials, neutral refractory materials, and alkaline refractory materials; According to their density, they can be divided into lightweight refractory materials and heavy refractory materials; According to the shape and size of their products, they can be divided into standard bricks, special-shaped bricks, special-shaped bricks, pipes, and refractory vessels, etc; It can also be classified according to its application into blast furnace, cement kiln, glass kiln, ceramic kiln, etc; In addition, there are refractory materials used for special occasions.
The definition of refractory materials now no longer depends solely on whether the fire resistance is above 1580 ℃. At present, refractory materials generally refer to inorganic non-metallic materials used for lining production equipment such as metallurgy, petrochemicals, cement, ceramics, etc.
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