Description
| Item | Castable for tundish lining | Gunning mix for tundish | |||||
|---|---|---|---|---|---|---|---|
| ZBJ-1 | ZBJ-2 | ZBJ-3 | ZBT-1 | ZBT-2 | ZBT-3 | ||
| Chemical composition | Al2O3≥70% | Al2O3≥70% | Al2O3≥70% | MgO≥80% | MgO≥70% | MgO≥75% | |
| CaO≥2.0% | CaO≥2.5% | - | - | CaO≥10% | Cr2O≥3% | ||
| Bulk density | g/cm3 | ≥2.5 | ≥2.5 | ≥2.4 | ≥2.0 | ≥2.0 | ≥2.0 |
| Crushing strength, MPa | 110℃×24h | 20 | 30 | 40 | 5 | 5 | 5 |
| ≥60 1350℃×3h | ≥60 1350℃×3h | ≥50 1350℃×3h | ≥10 1500℃×3h | ≥10 1500℃×3h | ≥10 1500℃×3h |
||
| Modulus of rupture, MPa | 110℃×24h | 5 | 6 | 7 | 2.5 | 2.5 | 2.5 |
| 1350℃×3h | ≥10 1350℃×3h | ≥10 1350℃×3h | ≥10 1350℃×3h | ≥5.0 1500℃×3h | ≥5.0 1500℃×3h | ≥5.0 1500℃×3h |
|
| Permanent linear change, % | ±0.5 1350℃×3h | ±0.5 1350℃×3h | ±0.5 1350℃×3h | -2.5~+1.0 1500℃×3h | -2.5~+1.0 1500℃×3h | -2.5~+1.0 1500℃×3h |
