Bata tahan api melengkung adalah bata berbentuk khusus berbentuk setengah lingkaran yang umum, biasanya terbuat dari alumina tinggi atau tanah liat, dengan ketahanan api yang baik. Bata ini terutama digunakan untuk melapisi peralatan tahan suhu tinggi seperti tungku industri dan boiler. Batu bata melengkung dapat menahan suhu hingga 1400 ° C atau lebih tinggi.
Karena bentuk khusus batu bata lengkung, maka sangat cocok untuk perapian melingkar atau struktur melengkung. Ini banyak digunakan dalam operasi suhu tinggi seperti pembuatan baja dan tungku keramik.
| Item | LZ-80 | LZ-75 | LZ-70 | LZ-65 | LZ-60 | LZ-55 | LZ-48 | |
|---|---|---|---|---|---|---|---|---|
| Al2O3, /% | ≥ | 80 | 75 | 70 | 65 | 60 | 55 | 48 |
| Porositas Nyata, % | ≤ | 21 | 24 | 24 | 24 | 26 | 22 | 22 |
| Kekuatan Penghancuran Dingin, MPa | ≥ | 70 | 60 | 55 | 50 | 45 | 45 | 40 |
| 0.2MPa Refraktilitas Di Bawah Beban, ℃ | ≥ | 1530 | 1520 | 1510 | 1500 | 1430 | 1450 | 1420 |
| Perubahan Linear Permanen, % | 1500℃*2h-0.4~0.2 | 1450℃*2h-0.4~0.1 | ||||||
Batu bata tahan api lengkung dapat diklasifikasikan menurut bahan, bentuk, dan kegunaannya. Berikut ini adalah metode klasifikasi utama:
▶ 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.