Low cement refractory castable is a new type of castable with little binder. The key point is to use no more than 1 μ m ultrafine particles. Its heat shock resistance, slag resistance and corrosion resistance are significantly improved, which is better than that of similar refractory bricks. Ultra low cement castable and cement free castable can be prepared by further reducing the binder content.
| Items | High-alumina Low-cement Castable | Corundum Low-cement Castable | |||
| Brands | G-15 | G-16 | G-17 | G-18 | |
| Max Service Temp. ℃ | 1500 | 1600 | 1650 | 1750 | |
| 110℃Baked BD (g/cm3) | ≥2.60 | ≥2.65 | ≥3.00 | ≥3.00 | |
| Composition % | AL2O3 | ≥75 | ≥78 | ≥90 | ≥93 |
| SiO2 | ≤20 | ≤15 | ≤6 | ≤1 | |
| MOR MPa | 110℃×24h | ≥8 | ≥10 | ≥13 | ≥8 |
| 1100℃×3h | ≥8 | ≥10 | ≥13 | ≥8 | |
| 1500℃×3h | / | / | ≥15 | ≥8 | |
| CCS MPa | 110℃×24h | ≥80 | ≥100 | ≥100 | ≥80 |
| 1100℃×3h | ≥80 | ≥100 | ≥100 | ≥80 | |
| 1500℃×3h | / | / | ≥100 | ≥80 | |
| RLC % | 1100℃×3h | -0.1～-0.3 | -0.1～-0.3 | -0.1～-0.3 | ±0.20 |
| 1500℃×3h | / | / | -0.2～-0.5 | ±0.50 | |
| Water used in construction % | 6-7 | 5.5-6.5 | 4.5-5.5 | 5.5-6.5 | |
| Construction way | Shock | Shock | Shock | Shock | |
| Application | Applied in the front kiln, rear kiln, kiln hood and grate cooler, where high temperature serves in other furnace lining. | Applied where GF-15 is used, superior to GF-15 in insulation and strength. | Applied in both front and rear kiln, coal-pouring tube and other industrial furnace lining. | Applied in both front and rear kiln, coal-pouring tube and other industrial furnace lining. | |
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