Performance of Insulation Refractory

Refractory fibre as a highly efficient heat preservation and heat insulation refractory material, has both the general fiber soft, the characteristics of high strength, can be processed into various products, such as blanket, cord, belt, carpet, etc., and has the performance of ordinary fibers have no part such as oxidation resistance, corrosion resistance, high temperature resistant, etc., to make up for a general refractory too brittle faults.

And refractory fiber volume density is small, usually 0.1~0.2g/cm3, is ordinary clay brick 1/20~1/10, light clay brick 1/10~1/5. Therefore, the use of refractory fiber instead of firebrick, can reduce the weight of furnace body, reduce the thickness of furnace wall. In addition, refractory fiber specific heat is low, only ordinary firebrick 1/72, light clay brick 1/42. Therefore, it is often used as intermittent kiln lining, which can significantly reduce heat storage loss, save fuel and increase heating rate. Refractory fiber products have been widely used in industrial kilns and have achieved obvious energy saving effect. For continuous operating furnace, the use of refractory fiber products can save energy of 3%~10%, for intermittent operating thermal equipment, the use of fiber refractory material energy saving is more obvious, energy saving up to 10%~30%, or even higher. The masonry method of refractory fiber products has great influence on its thermal insulation effect.

Adiabatic board is a kind of not to burn the product, by fireproof fiber material, fireproof raw material, union agent and admixture composition, is an important variety of heat preservation and heat insulation refractory material. According to the material, the insulation plate is divided into silica, magnesium, magnesium olivine, aluminum silicate and floating beads. This refractory material is characterized by low thermal conductivity, low density and good corrosion resistance. It is mainly used in ingot cap and continuous casting tundish, so it is called tundish adiabatic plate and cast mold adiabatic plate respectively. The insulation plate of tundish is divided into wall plate, bottom plate and impact plate.

Insulation refractory materials should be selected reasonably according to the purpose and requirements of energy saving, structural characteristics, working conditions and service life of furnace.

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