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Andalusite brick is made from high-purity alumina and mullite, with refractoriness up to 1700℃. It is ideal for blast furnaces and hot blast stoves.
- Al2O3: ≥55%;
- Fe2O3: ≤1-1.5%;
- Bulk Density: 2.30-2.70g/cm³;
- Refractoriness Under Load: ≥1450-1700ºC;
- Cold Crushing Strength: 40-55MPa;
- サンプル：あり；
Description of Andalusite Brick
Andalusite bricks are made of high-purity alumina and mullite, with a refractoriness of up to 1700°C. They have excellent thermal shock stability and slag resistance and are widely used in high-temperature industrial furnaces such as blast furnaces and hot blast furnaces.
Technique Data of Kerui Andalusite Brick
| Andalusite Refractory Bricks | RH-155 | RH-150 | RH-145 | RH-140 | RH-135 | RH-130 | |
|---|---|---|---|---|---|---|---|
| アル2O3, % | ≥ | 69 | 65 | 61 | 57 | 53 | 49 |
| フェ2O3, % | ≤ | 1 | 1 | 1.2 | 1.2 | 1.5 | 1.5 |
| 酸化チタン2, % | ≤ | 0.5 | 0.5 | 0.5 | 0.6 | 0.6 | 0.6 |
| 見掛け気孔率、% | ≤ | 20 | 20 | 20 | 20 | 20 | 20 |
| Bulk Density, g/cm³ | 2.55~2.70 | 2.50~2.65 | 2.45~2.60 | 2.40~2.55 | 2.35~2.50 | 2.30~2.45 | |
| 冷間圧壊強さ、MPa | 55 | 55 | 50 | 50 | 40 | 40 | |
| 0.2MPa 荷重屈折率 ℃（荷重屈折率 | ≥ | 1700 | 1700 | 1650 | 1600 | 1520 | 1450 |
| Permanent Line Change, % | 1500℃*2h ±0.2 | 1450℃*2h ±0.2 | |||||
Advantages of Andalusite Brick
Great Refractoriness
Andalusite refractory bricks have great refractoriness under high-temperature situations. After heating them, they will have better refractoriness than mullite bricks. Andalusite refractory bricks can resist up to 1700℃. They can be used for the linings and other parts of the high-temperature equipment.
Chemical Stability
Andalusite blocks have excellent chemical stability. They will not eroded by chemical materials so that affects the production. Besides, they even have insoluble strong acids like HF (hydrofluoric acid). In complex industrial equipment, a stable chemical capacity is the key to extending the life cycle of equipment.
Low Creep Rate
Andalusite bricks have a low creep rate. This contributes to keeping the volume of equipment. And they will not affected by thermal shock in the high-temperature environment. In this situation, the safety hazard is avoided in the production process.
Good Mechanical Shock Resistance
Good mechanical shock resistance helps fire andalusite brick resist the shock of the equipment in the working process. The bricks will not easily peel off. Therefore, this brick can used in the industrial equipment with strong shock environment.
Application of Andalusite Brick
Andalusite brick is widely used in blast furnaces, hot blast stoves, steel ladles, rotary kilns, and other high-temperature industrial furnaces.
