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Sillimanite bricks are high-alumina refractory products made from natural sillimanite minerals (sillimanite, andalusite, kyanite) as the main raw materials, and their chemical composition is Al2O2-SiO2 system. The Al2O2 content is usually higher than that of ordinary high-alumina bricks, with a refractoriness of 1770-1830℃ and a load softening temperature range of 1500-1650℃.
| Item | GXS-50 | GXS-60 | GXS-62 | |
| Chemical Composition % | Al2O3 | ≥50 | ≥60 | ≥62 |
| SiO2 | ≤45 | ≤38 | ≤33 | |
| Fe2O3 | ≤1.2 | ≤1.0 | ≤1.0 | |
| Apparent Porosity % | ≤18 | ≤18 | ≤17 | |
| Bulk Density g/cm³ | ≥2.4 | ≥2.5 | ≥2.55 | |
| Cold Crushing Strength Mpa | ≥45 | ≥50 | ≥60 | |
| Refractoriness Under Load (0.2MPa) | ≥1550 | ≥1600 | ≥1650 | |
| Permanent Linear Change On Reheating | ±0.1 | ±0.1 | ±0.1 | |
| Thermal Shock Resistance 100℃ water Cycles | ≥20 | ≥20 | ≥20 | |
| Reversible Thermal Expansion 1000℃ | 0.55 | 0.6 | 0.6 | |
| Pyrometric Come Equivalent S.C.SK | 35 | 36 | 38 | |
| Range of Application | Rider Arches | superstructure forehearth |
superstructure | |
1.Glass Industry
● Glass melting furnace flow hole, feed trough, mud tube, etc.
● Float glass tin bath lining.
2.Metallurgical Industry
● Blast furnace lining, furnace throat and hot blast furnace flue.
● Torpedo tank, ladle slide, etc.
3.Environmental Protection and Chemical Industry
● Garbage incinerator lining materials.
● Matrix of special materials such as high-temperature coatings and unshaped refractory mud.
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