The special castable for coal injection pipe is used for lining and insulating layer of various kilns with harsh service conditions, such as reaction section, combustion chamber, throat of carbon black furnace, etc. its service temperature is 1927 ℃, and air velocity is 0.6-0.8 mach. DC furnace cover, etc.
| Composition | Property | |
| Max Service Temp.°C | 1750 | |
| BD g/cm3³ 110°C×24h | ≥2.8 | |
| CCS MPa | 110°C×24h | ≥80 |
| 1100°C×3h | ≥100 | |
| 1500°C×3h | ≥100 | |
| MOR MPa | 110°C×24h | ≥8 |
| 1100°C×3h | ≥10 | |
| 1500°C×3h | ≥10 | |
| RLC % | 1100°C×3h | ±0.2 |
| 1500°C×3h | ±0.5 | |
| Al2O3 % | ≥80 | |
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