Groupe Rongsheng
Sillimanite refractory bricks are sillimanite mineral-based refractory bricks produced by the high-temperature sintering method or slurry casting method. La fabrication de briques de sillimanite présente de très bonnes performances à haute température. La sillimanite est un minéral réfractaire naturel de haute qualité, Après calcination à haute température, sillimanite will transform into mullite and free SiO2. Les briques de sillimanite et les briques de mullite ont un caractère réfractaire plus élevé sous charge que les briques en argile réfractaire. Les briques de sillimanite ont une structure dense, lorsqu'il est appliqué dans des fours à verre, le liquide de verre n'a pas tendance à former de bulles. Les briques de sillimanite conviennent donc pour nourrir les bidons, barils d'argile, anciens blocs, et gamelles d'alimentation.
Specification of sillimanite refractory brick
| Briques de sillimanite | ||||
| Article/Index | GXS-50 | GXS-60 | GXS-50 | |
| Composition chimique | Al2Ô3 | ≥50 | ≥60 | ≥62 |
| SiO2 | ≤45 | ≤38 | ≤33 | |
| Fe2Ô3 | ≤1,2 | ≤1,0 | ≤1,0 | |
| Porosité apparente (%) | ≤18 | ≤18 | ≤17 | |
| Densité apparente (g/cm3) | ≥2,4 | ≥2,5 | ≥2,55 | |
| Résistance à l'écrasement à froid (Mpa) | ≥45 | ≥50 | ≥60 | |
| Caractère réfractaire sous charge (0.2MPa T0.6℃) | ≥1550 | ≥1600 | ≥1650 | |
| Taux de changement linéaire de réchauffage (1500℃*2h %) | ±0,1 | ±0,1 | ±0,1 | |
| Résistance aux chocs thermiques (100℃ eau/fois) | ≥20 | ≥20 | ≥20 | |
| Expansion thermique réversible (1000℃ %) | 0.55 | 0.6 | 0.6 | |
| Équivalent à un cône pyrométrique (S.C.. Sask.) | 35 | 36 | 38 | |
| Application | Arche du cavalier | Superstructure de l'avant-foyer | Superstructure de l'avant-foyer | |
The raw material composition of sillimanite bricks
Sillimanite bricks are made of sillimanite, andalusite, and sintered mullite as the main raw materials, with some ultrafine powder and binder added, and are formed by high-pressure molding or vibration pressure molding, and fired in a tunnel kiln. The firing temperature is 1390~1400℃, and the heat preservation time is 10~16h. The proportion of sillimanite bricks: 30%~40% sillimanite, 35%~55% andalusite + mullite, 10%~15% special grade alumina, and 5%~10% raw clay.
Application of sillimanite refractory bricks
Sillimanite refractory bricks are mainly used for forming flow holes in glass tank kilns, blast furnace linings, furnace throats, and ceramic industrial kiln furniture.
Characteristics of sillimanite bricks
Densité apparente: The bulk density of sillimanite bricks is large, generally between 2.3-2.5g/cm’.
Refractory: The refractoriness of sillimanite bricks is high, generally between 1770-1830℃.
Load softening temperature: The load softening temperature of sillimanite bricks is generally between 1500-1650℃.
Thermal shock resistance: Sillimanite bricks have good thermal shock resistance and can withstand large temperature changes.
Résistance à la corrosion: Sillimanite bricks have good corrosion resistance and can withstand the erosion of various acidic and alkaline substances.
Rongsheng refractory brick manufacturer introduction
Rongsheng is a 20-year-old refractory material factory that can customize different types of refractory bricks for the kiln industry. Hot-selling products include high-alumina bricks, mullite bricks, low-porosity clay bricks, acid-resistant bricks, etc.If you need related products, please contact us
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