| abstract |
The invention provides a corundum composite brick and a preparation method thereof. The corundum composite brick includes a corundum heavy layer and a heat insulation layer combined with it; the raw material composition of the corundum heavy layer includes: 35-75wt% corundum, 10-30wt% andalusite, 5-15wt% Alumina powder, 0-10wt% of chromium trioxide powder, 0-10wt% of zirconia powder, 3-8wt% of bonded clay; the raw material composition of the thermal insulation layer includes: 15-65wt% of alumina hollow Balls, 15-65wt% mullite, 5-15wt% alumina powder, 3-8wt% bound clay. The corundum composite brick not only has excellent refractoriness and heat insulation effect, reduces heat loss, but also has convenient construction and stable structure, and can improve the stability and operation efficiency of equipment when used in rotary kilns. |