El ladrillo refractario curvado es un ladrillo común de diseño semicircular y forma especial, generalmente de alta alúmina o arcilla, con buena resistencia al fuego. Se utiliza principalmente para el revestimiento de equipos resistentes a altas temperaturas, como hornos industriales y calderas. Los ladrillos curvados pueden soportar temperaturas de hasta 1400°C o superiores.
Debido a la forma especial de los ladrillos curvos, es adecuado para hogares circulares o estructuras curvas. Se utiliza mucho en operaciones a alta temperatura, como la siderurgia y los hornos de cerámica.
| Artículo | LZ-80 | LZ-75 | LZ-70 | LZ-65 | LZ-60 | LZ-55 | LZ-48 | |
|---|---|---|---|---|---|---|---|---|
| Al2O3, /% | ≥ | 80 | 75 | 70 | 65 | 60 | 55 | 48 |
| Porosidad aparente, % | ≤ | 21 | 24 | 24 | 24 | 26 | 22 | 22 |
| Resistencia al aplastamiento en frío, MPa | ≥ | 70 | 60 | 55 | 50 | 45 | 45 | 40 |
| 0,2MPa Refractariedad bajo carga, ℃ | ≥ | 1530 | 1520 | 1510 | 1500 | 1430 | 1450 | 1420 |
| Cambio lineal permanente, % | 1500℃*2h-0.4~0.2 | 1450℃*2h-0.4~0.1 | ||||||
Los ladrillos refractarios curvados pueden clasificarse en función de sus materiales, formas y usos. A continuación se exponen los principales métodos de clasificación:
▶ Classification by Material:
1.Clay Refractory Bricks: mainly made of clay, suitable for environments with temperatures not exceeding 1300°C.
2.High Alumina Refractory Bricks: contain a higher proportion of bauxite, have high refractoriness, and are suitable for higher temperature applications.
3.Magnesium Refractory Bricks: use magnesium ore as raw material, have excellent corrosion resistance, and are often used in metal smelting.
4.Silica Refractory Bricks: mainly composed of silicon dioxide, suitable for acidic environments.
▶ Classification by Shape
1.Standard Curved Bricks: have a standard semicircular design and are suitable for general furnace structures.
2.Special Curved Bricks: include a variety of non-standard shapes, such as grooves or special angle designs, to adapt to specific furnace structures.
▶ Classification by Use
1.Curved bricks for blast furnaces: specially designed for blast furnace linings, withstand extreme high temperatures and chemical erosion.
2.Curved bricks for electric furnaces: used for electric furnace linings, emphasizing electrical insulation and thermal stability.
3.Curved bricks for cement kilns: Designed for special needs in the cement production process.