How to improve the heat insulation performance of light refractory brick
Corundum mullite, Zircon mullite, mullite light heat break brick, corundum hollow ball brick and other products have high density, high hardness and excellent wear and corrosion resistance, Refractory, have a high market share.
The porosity and density of light corundum refractory brick made by foaming method basically depend on the optimum quantity and mud property of the additive which can strongly release the gas, and the time of severe gas evolution, number of additives that cause light to form a cohesive structure. Reducing the density at the same time, the use of calcined and ground alumina. When the density decreased from 1.23 g/cm3 to 0.9 g/cm3, the porosity increased from 67.2% to 76.4% , and the calcined alumina increased from 10% to 100% .
As the thermal conductivity and strength of light refractory brick are lower than that of compact brick, its thermal shock resistance is better. The stomatal ratio decreased with the increase of stomatal ratio. The heat shock resistance of fire brick with fire additive, especially with granular material, is better than that of light firebrick with foam. However, a large number of light corundum firebrick (230mm amp; times; 65mm) with standard size are heated to 1300 °C, AND ONLY WITHSTAND 1 & MDASH; 2 Heat Exchanges, it's hard to adapt to the conditions. At the same time, it is confirmed that the volume of crack and broken part increases at the initial cooling stage, which improves the heat insulation performance of light corundum refractory brick.
At high temperature, light corundum refractory bricks are also stable to hydrogen, methane and other reducing gases, and can be widely used in open annealing furnace lining with hydrogen medium protection, there are also many gas and air preheater liners for carbon black reactors.
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