Sillimanite Brick
Sillimanite Special Brick
Apparent Porosity (%) ≤24
Bulk Density (g/cm3) ≥2.30
Cold Crushing Strength (Mpa) ≥55
0.2Mpa Refractoriness Under Load T0.6 ℃ ≥1550
PRODUCT DESCRIPTION
Introduction:
Sillimanite special bricks are made of sillimanite minerals by high-temperature firing. Sillimanite is calcined at high temperatures and converted into mullite and free silica. It has the characteristics of high refractoriness, high thermal shock stability, low thermal expansion rate, corrosion resistance of metallurgical slag and various glass liquids and good high temperature wear resistance. The refractoriness is 1770~1830℃, and the refractoriness under load is 1500~1650℃. It’s mainly used in glass furnaces, blast furnace linings, furnace throats, and ceramic kiln.
Features:
The product has good high temperature performance, high refractoriness under load, low creep rate under high temperature, good thermal shock resistance, small thermal expansion coefficient, and acid slag erosion resistance.
Applications:
Because sillimanite refractories have high thermal shock stability, resistance to erosion of molten glass, and less pollution to molten glass, sillimanite special-shaped products are mainly used in glass industry feeders, pipe drawing machines, and other equipment, which can significantly improve production effectiveness. The products mainly include spouts, orifice rings, stirrers, plungers, tubes, and spout covers.
TECHNIQUE DATA
| Item | Sillimanite Expendables | ||
| ChemicalComposition % | Al2O3 | ≥58.00 | |
| Fe2O3 | ≤0.8 | ||
| Refractoriness ℃ | ≥1790 | ||
| Apparent Porosity % | ≤24 | ||
| Bulk Density g/cm3 | ≥2.3 | ||
| Cold Crushing Strength Mpa | ≥50 | ||
| 0.2Mpa Refractoriness Under Load T0.6 ℃ | ≥1550 | ||
| Reheating Linear Change % | 1400℃×2h | ﹢0.1 -0.3 | |
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