What is the thermal conductivity of mullite brick?
Higher thermal conductivity leads to high temperature of kiln shell, high heat loss and high fuel consumed, lower lifetime of tire and kiln shell. Meanwhile, under the impact of chemical corrosion and mechanical erosion, refractory is easily damaged
In order to restrain kiln shell’s thermal loss and potential safety hazard, method of lower conductivity coefficient of refractory will be the first alternative. But lower conductivity coefficient method of SiC-mullite brick and Magnesia-spinel brick is limited. When choosing other materials, corrosion resistance property and environment issues should be taken into consideration. Given all that, composite designs are of considerable interest [3-6]. Multilayer mullite based brick with reduced thermal conductivity choose the method of multilayer structure with working layer, thermal-preservation layer and thermal-insulation layer. Working layer has been designed with high strength, lower thermal conductivity, high refractoriness under load, high thermal shock resistance and long lifetime; As bonding structure connecting working layer and thermal-insulation layer, thermal preservation layer combines excellent high strength as well as lower thermal conductivity; thermal insulation layer use ultra-lower thermal conductivity to decrease brick’s thermal conductivity.
