... .YAOXING lightweight mullite fire brick is made from high-grade and high purity refractory powders and materials.2. ... according to the required proportion. 3.YAOXING mullite brick is compressed in vacuum and sintered under high ... , heat-processing furnace,resisitance furnace, tunnel kiln, shuttle kiln, bell-cover kiln, glass-pool-kiln,etc.Technical Index ProductMullite Fire brickClassification ...