Al2O3: 40-90%
Material: Corundum, High alumina, Clay
High density and strength
Good using effect
Strong applicability
Low Cement Castable
Description
Low cement castable is developed on the basis of clay and refractory castables. It mainly includes low cement, super low cement, non-cement refractory castable.
Low Cement Castable Features
- High density
- Low apparent porosity
- High strength
- Little wear
- Thermal shock resistance
- Preservative
Low Cement Castable Video
Low Cement Castable Specification
| Low Cement Castable | Corundum | Alumina | Alumina | Alumina | Alumina | Clay | |
|---|---|---|---|---|---|---|---|
| KR-90 | KR-80 | KR-70 | KR-60 | KR-50 | KR-40 | ||
| Chemical composition (%) | Al₂O₃ | ≥90 | ≥80 | ≥70 | ≥60 | ≥50 | ≥40 |
| CaO | ≥2.5 | ≥2.5 | ≥2.5 | ≥2.5 | ≥2.5 | ≥2.5 | |
| Bulk density g/cm3 | 110℃×24h | ≥2.95 | ≥2.75 | ≥2.6 | ≥2.5 | ≥2.4 | ≥2.3 |
| 1500℃×3h | ≥2.9 | ≥2.7 | ≥2.6 | ≥2.4 | ≥2.4 | ≥2.3 | |
| Compressive strength MPa | 110℃×24h | ≥60 | 45 | 45 | 40 | 40 | 40 |
| 1500℃×3h | ≥80 | 75 | 70 | 60 | 60 | 60 | |
| Breaking strength MPa | 110℃×24h | ≥8 | ≥7 | ≥6 | ≥6 | ≥6 | ≥6 |
| 1500℃×3h | ≥10 | ≥10 | ≥10 | ≥8 | ≥8 | ≥8 | |
| Linear Change PLC (%) | 110℃×24h | ≤-0.1 | ≤-0.1 | ≤-0.1 | ≤-0.1 | ≤-0.1 | ≤-0.1 |
| 1500℃×3h | ≤-0.5 | ≤-0.5 | ≤-0.5 | ≤-0.5 | ≤-0.5 | ≤-0.5 | |
| Max. service temperature ℃ | 1700 | 1600 | 1500 | 1450 | 1400 | 1350 | – |
Low Cement Castable Application
Low cement castables are used in the rear kiln eye, guide vane cover, rear part of cooler, etc. of thermal equipment such as cement rotary kiln.
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