Description of Sillimanite bricks
Sillimanite bricks are refractory bricks with good characteristics prepared from silica minerals by high-temperature firing method or slurry casting method. It is mainly used in glass kilns, blast furnace linings and kilns in the ceramic industry.
Characteristics of sillimanite bricks
| Indicator | Machine press moulding | Casting forming | ||
|---|---|---|---|---|
| Al2O3,%,не менее | 57 | 60 | 65 | 60 |
| Fe2O3, %, не более | 1.2 | 1.0 | 1.0 | 1.0 |
| Bulk Density, g/cm3，no less than | 2.4 | 2.45 | 2.5 | 2.45 |
| Apparent Porosity, % | 18 | 18 | 17 | 18 |
| Cold crushing strength, MPa | 70 | 70 | 70 | 60 |
| Refractorines under load, 0.2MPa,T0.6/℃ | 1560 | 1580 | 1650 | 1550 |
| Термостойкость(1100℃， вода）/раз | 25 | 20 | 15 | 25 |
| Burning line rate of change（1500℃×2h)/ % | -0.2-+0.2 | -0.2-+0.2 | -0.2-+0.2 | -0.2-+0.2 |
Features of Sillimanite bricks
Excellent resistance to high temperatures
Sillimanite bricks can withstand extremely high temperatures (often exceeding 1700°C) and maintain stable physical and chemical properties in high-temperature environments, making them ideal for use in glass furnaces, metallurgical furnaces and other high-temperature equipment.
Good resistance to thermal shock
Sillimanite bricks do not crack or splinter under conditions of sharp temperature fluctuations, withstands frequent alternation of heat and cold, prolonging the life of the oven.
High resistance to chemical attack
Sillimanite bricks have good resistance to alkaline and acid erosion, especially in glass kilns, and can effectively resist chemical corrosion of the glass melt.
Low coefficient of thermal expansion
Sillimanite bricks have a low coefficient of thermal expansion and change little in volume at high temperatures, which maintains the stability of the kiln structure and reduces damage caused by thermal stresses.
