Leben neefsasho leh oo lula tells the classification of refractory materials

Literally understood, a refractory material is a material that can withstand high temperatures. As far as steelmaking manufacturers are concerned, low-end refractory materials such as castables, fire clay, etc., high-end refractory materials such as breathable bricks for ladle, electric furnace covers for electric furnaces, etc. Refractories are widely used in steel, non-ferrous metals, glass, boilers, electric power, military industry, ceramics, petrochemicals, machinery, light industry and other fields. They are the basic materials necessary for the production operation and technology research and development in these fields. In the field of high-temperature production Has an irreplaceable position.

(Sawirka) Refractory

From a professional point of view, refractory materials are a class of inorganic non-metallic materials with a refractoriness (also known as melting resistance) not lower than 1580°C. Refractoriness is a technical index that integrates the chemical composition, dispersion, proportion and viscosity of the liquid phase contained in the material. However, it is not comprehensive enough to define refractory materials only in terms of refractoriness, that is, 1580°C is not absolute. The current concept interpretation is that when used in a high-temperature environment, the material whose physical and chemical properties allow it is called refractory.

There are many ways to classify refractory materials, which are based on the level of refractoriness, the shape and size of the product, the manufacturing method, and the chemical properties of the ingredients.

(Picture) Electric furnace cover

According to the degree of refractoriness: ordinary refractories, advanced refractories, special refractories; according to the shape and size of the products: standard, special, special, and special products; according to the manufacturing method, the refractories can be divided into: firing Products, unfired products, unshaped refractory materials; classified according to the chemical properties of the ingredients contained in the material: acidic, neutral, and alkaline refractory materials; classified according to chemical mineral composition, practical application significance is stronger, can be divided into aluminum Quality, corundum, magnesia, magnesia-calcium, aluminum-magnesium, silicon, etc.; classification of unshaped refractories (classified according to the method of use): castables, spray coatings, ramming materials, etc.

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