刚玉耐火浇注料是以刚玉和超级铝矾土熟料为骨料和粉料，加上一些纯铝酸钙水泥以及粘结剂和添加剂混合而成的不定形耐火材料。刚玉浇注料的氧化铝含量大于 90%，保证了大量刚玉作为主晶相的存在。它具有强度高、体积稳定、耐腐蚀等优点。刚玉浇注料通常采用浇注法施工，可浇注成整体内衬或现场拼接。
| 项目/等级 | GJ80 | GJ90 | GJ95 |
|---|---|---|---|
| ω（Al2O3) ≥/% | 80 | 90 | 95 |
| 体积密度 ≥/ (g/cm³) | 2.7 | 2.8 | 3.2 |
| 挠曲强度 ≥/MPa | 9 | 10 | 11 |
| 压缩强度 ≥/MPa | 60 | 60 | 60 |
| 永久线性变化 ≤/% | ±0.5 | ±0.5 | ±0.5 |
1.Corrosion Resistance 2.High-Pressure Strength 3.Good Volume Stability 4.Excellent Mechanical Strength
Corundum castables can be used in a variety of furnace linings: 1.Steelmaking furnaces: electric arc furnaces, ladle linings 2.Glass furnaces: linings of glass furnace walls, cement kiln roofs and floors 3.Ladles and crucibles: construction and repair of ladles and crucibles in industries involving metal melting and pouring operations 4.Pipes and chimneys: linings of flue gas ducts and chimneys in power plants and industrial facilities 5.Burner throats: burner throats and preheater systems