Sillimanite Fire Brick

Al2O3% (≥)60-65

SiO2 (≥)32-35

Bulk Density (g/cm³)2.4-2.5

Cold Crushing Strength (MPa) 80

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Sillimate Fire Brick

Sillimanite is a natural high-grade refractory mineral with low thermal expansion rate, resistance to erosion by metallurgical slag and various glass liquids, and good high-temperature wear resistance. Its physical and chemical properties are better than those of high alumina bricks, its refractory degree is 1770~1830℃, and its load softening starting point is 1500~1650℃. It is mainly used for the forming of the flow hole of the glass tank kiln, blast furnace lining, furnace throat and ceramic industrial kiln furniture. Refractory materials based on natural sillimanite also have these advantages. Therefore, sillimanite refractory materials are widely used in metallurgy, chemical industry, building materials and other industries.

Item	Specification
	GXS65	GXS 60
Al₂O₃ %	≥65	≥60
SiO₂ %	≤32	≤35
Fe₂O₃ %	≤0.5	≤1.0
Apparent Porosity, %	≤18	≤19
Bulk Density g/cm³	≥2.5	≥2.4
CCS, MPa	≥80	≥80
0.2MPa RUL, ℃	≥1650	≥1600
Permanent Linear Change % 1400℃×2h	±0.2