Sillimanite bricks are manufactured using either high temperature sintering or slurry casting processes and feature excellent high temperature performance. Sillimanite is an all-natural high grade refractory mineral with superior corrosion and wear resistance properties, such as low thermal expansion rate, excellent molten slag corrosion resistance and glass liquid corrosion resistance, high temperature abrasion resistance and so forth. Sillimanite bricks and mullite bricks have higher refractoriness under load compared to fireclay bricks. Their dense structure means glass liquid doesn’t tend to form bubbles during use in glass furnaces, making these sillimanite bricks suitable for feeding canisters, clay barrels, former blocks and feeder bowls.
| Properties | GMT55 | GMT65 |
| Al2O3(%) | 55-60 | 60-70 |
| Al2O3+SiO2(%) | >97 | >98 |
| Fe2O3(%) | <0.8 | <0.5 |
| Refractoriness(℃) | ≥1790 | ≥1790 |
| Refractoriness under load | ≥1550 | ≥1600 |
| Apparent Porosity(℃) | 15-22 | 15-22 |
| Bulk Density(g/cm3) | 2.3-2.5 | 2.5-2.65 |
| Normal temperature compressive strength(Mpa) | >60 | >60 |
| Permanet liner change on reheating(℃) | ±0.1 | ±0.1 |
Sillimanite Refractory Bricks offer several advantages:
- good thermal stability with low expansion rate;
- Slag has excellent corrosion resistance; 3 Dense body construction that resists glass corrosion; 4 High temperature resistance and
5 Achieve high softening temperatures under load.
Dimensions of Refractory Brick
The standard size for Refractory Brick is 230*114*65mm; other sizes such as 230*114*76mm and 230*114*32mm may also be widely used. Furthermore, custom shapes may also be produced per customer requirements.
Applications of Refractory Sillimanite Brick: Sillimanite brick is often utilized as a molding material in glass pool kilns, blast furnace lining, furnace throat and ceramic industrial kiln furniture kilns. Refractories composed of natural sillimanite also offer these advantages and are widely utilized across metallurgy, chemical and building material industries.
