Mullite Bricks

Mullite Bricks are an excellent quality high alumina refractory product with about 65~75 percent alumina content. Mullite brick is made of mullite as the main raw material and molded through high temperature firing and pressure. Mullite bricks have advantage performance on furnace and kiln application such as high temperature resistance, chemical and mechanical corrosion, good thermal shock resistance and so on.

  Technical Data:

Items MU 65 MU 70 MU 75
Chemical Composition Al2O3 % ≥65 ≥70 ≥75
SiO2 % ≤33 ≤26 ≤24
Fe2O3 % ≤1.0 ≤0.6 ≤0.4
Bulk Density g/cm3 ≥2.55 ≥2.55 ≥2.55
Reheating Linear Change (%)   1500℃×2h 0~+0.4 0~+0.4 0~+0.4
Apparent Porosity   % ≤17 ≤17 ≤18
Thermal Conductivity W/(m·K)  1000℃ 1.84 1.95 1.95
Cold Crushing Strength  MPa ≥60 ≥80 ≥80
Thermal Expansion Coefficient (×10-6℃-1) 0.6 0.6 0.55
0.2Mpa Refractoriness Under Load  T0.6 ℃ ≥1600 ≥1600 ≥1650
Thermal Shock Resistance 1000℃ water cycles ≥18 ≥18 ≥18

  Application:

Mullite bricks are mainly used for top of hot blast stove, stack and bottom of blast furnace, regenerative chamber of glass melter, ceramic post sintering kiln, furnace lining for dead angle of petroleum cracking and etc.

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