K23 K26 K28 Mullite Thermal Insulating Brick For Furnace Lining White

Product Description:

Also known as silica insulation bricks. More than 91% of silica, with a bulk density of 1.2g/cm3 or less, is a lightweight refractory material. The refractoriness and load softening temperature are similar to ordinary silica bricks with the same composition. However, due to many pores, the compressive strength, slag resistance, and corrosion resistance are not as good as those of ordinary silica bricks, but the thermal shock resistance is improved.

Light weight silica brick

Using finely divided silica as a raw material, its critical particle size usually does not exceed 1 mm, and particles smaller than 0.5 mm therein are not less than 90%. The flammable substances are added to the ingredients or a porous structure is formed by a gas generation method and is obtained by firing. Can also be made without burning products. It is mainly used in all parts of the kiln that require heat insulation or lighter weight without direct contact with the melt, from aggressive gases, and without rapid temperature changes. Used at high temperatures and cannot be contacted with basic refractory materials. According to different materials, the maximum use temperature is 1200 ~ 1550 °C.