曲面耐火煉瓦は、一般的な半円形設計の特殊形状煉瓦で、通常高アルミナまたは粘土で作られ、良好な耐火性を有する。主に工業炉やボイラーなどの高温耐火設備の内張りに使用される。湾曲レンガは1400℃以上の温度に耐えることができる。
湾曲したレンガの特殊な形状により、円形の炉や湾曲した構造物に適している。製鉄やセラミックキルンなどの高温作業で広く使用されている。
| 項目 | LZ-80 | LZ-75 | LZ-70 | LZ-65 | LZ-60 | LZ-55 | LZ-48 | |
|---|---|---|---|---|---|---|---|---|
| Al2O3, /% | ≥ | 80 | 75 | 70 | 65 | 60 | 55 | 48 |
| 見掛け気孔率、% | ≤ | 21 | 24 | 24 | 24 | 26 | 22 | 22 |
| 冷間圧壊強さ、MPa | ≥ | 70 | 60 | 55 | 50 | 45 | 45 | 40 |
| 0.2MPa 荷重屈折率 ℃（荷重屈折率 | ≥ | 1530 | 1520 | 1510 | 1500 | 1430 | 1450 | 1420 |
| 永久的な線形変化、% | 1500℃*2h-0.4~0.2 | 1450℃*2h-0.4~0.1 | ||||||
曲面耐火レンガは、材質、形状、用途によって分類することができる。主な分類方法を以下に示す：
▶ 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.