Universal Arc Brick
High Alumina Brick SeriesHigh alumina universal arc brick is an extremely versatile shaped refractory brick that can fit furnace bodies of different diameters, reducing brick types and inventory costs. Widely used in construction of various cylindrical kilns.
| Parameter | Specification |
|---|---|
| Material | High Alumina Bauxite |
| Max Service Temperature | 1500°C |
| Bulk Density | ≥2.4 g/cm³ |
| Cold Crushing Strength | ≥60 MPa |
| Al₂O₃ Content | ≥65% |
Material Introduction
High alumina bricks and clay bricks share similar production processes, with the key difference being the alumina content. High alumina bricks refer to neutral refractory materials with an alumina content above 48%. They are made from bauxite or other raw materials with high alumina content through forming and calcination. With high thermal stability, typically at 1500-1600°C, and good slag resistance, they are used for lining steel electric furnaces, glass melting furnaces, cement rotary kilns, and more.
Based on Al₂O₃ content, high alumina bricks can be classified into different grades: Grade I (Al₂O₃ content >75%), Grade II (Al₂O₃ content 60-75%), and Grade III (Al₂O₃ content 48-60%).
Product Features
- One brick fits multiple furnace body diameters
- High alumina material with high refractoriness
- High dimensional accuracy for convenient construction
- Effectively reduces brick types and lowers costs
- Corrosion resistant with long service life
Specification Parameters
| Index | SK35 / LZ-48 | SK36 / LZ-55 | SK37 / LZ-65 | SK38 / LZ-75 | SK40 / LZ-80 |
|---|---|---|---|---|---|
| Al₂O₃ (%) | ≥ 48 | ≥ 55 | ≥ 65 | ≥ 75 | ≥ 80 |
| Fe₂O₃ (%) | ≤ 2 | ≤ 2 | ≤ 2 | ≤ 2 | ≤ 2 |
| Refractoriness (℃) | 1750 | 1770 | 1790 | 1790 | 1800 |
| Apparent Porosity (%) | ≤ 22 | ≤ 22 | ≤ 23 | ≤ 23 | ≤ 22 |
| Bulk Density (g/cm³) | 2.25-2.35 | 2.25-2.35 | 2.25-2.35 | 2.45-2.55 | 2.55-2.65 |
| Cold Crushing Strength (MPa) | ≥ 39 | ≥ 44 | ≥ 49 | ≥ 54 | ≥ 59 |
| Refractoriness Under Load 0.2MPa (℃) | ≥ 1420 | ≥ 1470 | ≥ 1500 | ≥ 1510 | ≥ 1530 |
| Permanent Linear Change 1500℃×2h (%) | +0.1~-0.4 | +0.1~-0.4 | +0.1~-0.4 | +0.1~-0.4 | +0.1~-0.4 |
