Andalusite refractory bricks use andalusite as raw material, add sillimanite powder, mullite powder, and other powders, add binders according to the proportion, and strictly control the particle size, grade, and impurities such as TiO2 and R2O of the raw materials. After smelting, forming, e asciugatura, it is fired at high temperatures, which can meet the needs of different parts and working environments of modern blast furnace hot blast stoves, and plays an important role in improving the service life of blast furnace hot blast stoves.
![andalusite refractory bricks in different shapes](https://www.rsnewrefractory.com/wp-content/uploads/2023/05/andalusite-refractory-bricks-in-different-shapes.jpg)
Andalusite brick’s physical and chemical indicators
Articolo | Indice | ||||
RH155 | RH150 | RH145 | RH140 | RH135 | |
Al2O3 % | ≥69 | ≥65 | ≥61 | ≥57 | ≥53 |
Fe2O3 % | ≤1.0 | ≤1.0 | ≤1,2 | ≤1,2 | ≤1,5 |
TiO2 % | ≤0,5 | ≤0,5 | ≤0,5 | ≤0,6 | ≤0,6 |
Densità apparente g/cm3 | ≤20 | ≤20 | ≤20 | ≤20 | ≤20 |
Porosità apparente % | 2.55~2.70 | 2.50~2,65 | 2.45~2.60 | 2.40~2.55 | 2.35~2.50 |
Resistenza allo schiacciamento a freddo MPa | ≥55 | ≥55 | ≥50 | ≥50 | ≥40 |
0.2Refrattarietà Mpa sotto carico ℃ | ≥1700 | ≥1700 | ≥1650 | ≥1600 | ≥1520 |
Tasso di variazione lineare permanente % | 1500℃×2h ±0,2 | 1500℃×2h ±0,2 | 1500℃×2h ±0,2 | 1450℃×2h ±0,2 | 1450℃×2h ±0,2 |
Creep Rate % 0.2MPa 0~50h | ≤0.8 1550℃ | ≤0,8 1500℃ | ≤0,8 1450℃ | ≤0,8 1400℃ | ≤0,8 1350℃ |
Features of andalusite brick
![andalusite brick](https://www.rsnewrefractory.com/wp-content/uploads/2023/05/andalusite-brick.jpg)
- Resistenza alle alte temperature, resistenza all'usura, e resistenza alla corrosione.
- Buona resistenza agli shock termici.
- Low creep rate.
- Elevata temperatura di rammollimento sotto carico.
- Can reduce harmful impurities.
- Good thermal peeling resistance.
- Various specifications
- Adequate inventory, delivery on time
The raw material of andalusite brick
Mullite powder, andalusite fine powder, sillimanite fine powder, argilla, silicon micro powder, eccetera.
Andalusite refractory brick manufacturing process
Prepare the raw materials according to the formula ratio, then put the mullite powder, andalusite fine powder, and sillimanite fine powder into the sand mixer for mixing, then add clay and 2% of the total weight of the raw materials for mixing, and then add silicon The micro powder is mixed and pressed into adobe by a brick press machine. After the adobe is dried, it is put into a firing kiln for sintering, questo è, it is fired into an andalusite refractory brick.
The use of andalusite bricks in hot blast stoves
![andalusite bricks for kilns](https://www.rsnewrefractory.com/wp-content/uploads/2023/05/andalusite-bricks-for-kilns.jpg)
For hot blast furnace walls, checker bricks, furnace roof, and combustion chamber (andalusite low creep series).
Andalusite brick transportation
![andalusite brick transportation](https://www.rsnewrefractory.com/wp-content/uploads/2023/05/andalusite-brick-transportation.jpg)
After the factory receives the order, it will be produced as soon as possible and will be shipped within 7-12 giorni. Customized products will take longer.
Certificato pertinente
![certificato](https://www.rsnewrefractory.com/wp-content/uploads/2023/04/certificate-1.webp)
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