Corundum mullite brick The rigid corundum mullite insulation brick is a thermal insulation product with regular shape. It belongs to light insulation refractory material. The common characteristics of these materials are small bulk density, light bulk density and low thermal conductivity. But the strength is lower, the reheat shrinkage is bigger at high temperature, and the heat insulation and moisture retention effect is good. Excellent heat insulation, used for building thermal insulation projects inside and outside roofs of buildings, interior and exterior walls and roof.
Summer can effectively prevent the sun's thermal radiation, winter can prevent indoor heat conduction, improve the top floor and indoor living environment of the building. After using the heat insulating brick material, the temperature difference between the inside and outside of the roof is usually greater than 20 degrees in the midsummer heat. Users who have used the product can feel the obvious heat insulation and save the energy of the air-conditioning.
Corundum mullite brick Production process: generally use mullite to make corundum mullite bricks. Mullite aggregate can be used as aggregate, alpha -Al2O3 powder as powder material, fused or sintered corundum pellet as aggregate and mullite powder as powder material. The proportioning of aggregate and powder is determined according to the proportion and size gradation, and the waste liquor of sulphite pulp is used as binding agent and added in order. Mix evenly, use conflict brick press or hydraulic press machine. After being dry, the bricks are fired at 1650~1750 C.