Classification Of Refractory Materials

There are many types of refractory materials, and the current classification methods of refractory materials are roughly as follows.

1, according to the refractories can be divided intoOrdinary refractories: refractories greater than 1580℃~1770℃High-grade refractory: refractories greater than 1770℃~2000℃.Extra grade refractory: refractories greater than 2000℃~3000℃.Super refractories: refractories greater than 3000℃.

2, according to the manufacturing processAccording to the manufacturing process can be divided into natural rock, mud injection, plastic molding, semi-dry molding, dry press molding, ramming, melting and casting Such products.

3, according to chemical composition of a mineral can be divided into(1) siliceous productsSilica brick Si02>93% of the products, quartz glass Si02>99% of the fused products.(2) aluminum silicate productsSilicic acid Si02>65%, AI20s between 15~30%.Clay brick AI203 is between 30 and 48%.High aluminum brick AI203>48% of the products.(3) magnesium productsMagnesia brick: Mg0>85%, magnesia chrome brick Mg055~80% (Cr20:10~30%) products. Chrome magnesia brick: Mg025~55% combined with more chromite products; Magnesia-aluminum brick: magnesia-aluminum cuspite (Mg0-A1203) combined with magnesia-aluminum brick; Mg0·Si02) brick, Mg035~55%.Magnesium olivine (2Dolomite products: products with Ca0>40%, Mg0>35%.(4) Chrome brickCr20330%(5) carbonaceous productsCarbon brick: products with carbon content of 70~90%Graphite products: products containing more than 30% graphite.Silicon carbide products: with Sic as raw materials, fireclay or other inorganic products combined.(6) Special refractoriesHigh temperature ceramic material: cermet material.

4 Divide by shape and sizeAccording to shape and size can be divided into: standard, general, different, special brick, in addition, refractories according to firing method, according to use, according to construction characteristics, there are some other classification.

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