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It is made of dense bauxite as the main raw material, pure calcium aluminate cement as the bond, appropriately added in some silicon carbide, silica micro powder, expanding agent and additive.
It is a kind of castable made of fireproof aggregates, binding agents, additives and fireproof steel fiber of certain sizes (length: 20-35mm, sectional area: 0.13-0.2cm2).
Features:
- It restrains the shrinkage of castable during maintenance, drying and service.
- It improves the toughness, resistance to mechanical impact and mechanical strength.
- Better thermal shock resistance.
- It prevents the microcrack produced under thermal and mechanical stresses from extension which will lead to breakage and spalling.
Application:
It is mainly used in building material industry and parts of other industrial furnaces which require good anti-stripping performance and impact resistance, such as kilneye of cement rotary kiln, heat resistant steel chain zone of wet rotary kiln, cooling machine of cement kiln, coal-injection duct, etc.
| Steel Fiber Castable | Normal | Normal | High Strength | High Strength | |
| Brand | FA | FC | FHA | FHC | |
| Al2O3, %, ≥ | - | 70 | 83 | 70 | 80 |
| Bending Strength, MPa | 110 ℃ x24h, ≥ | 9 | 9 | 10 | 12 |
| 1300 ℃ x16h, ≥ | 5.5 | 6.5 | 10 | 12 | |
| Cold Crushing Strength, MPa | 110 ℃ x24h, ≥ | 70 | 70 | 70 | 80 |
| 1300 ℃ x16h, ≥ | 40 | 50 | 70 | 80 | |
| Bending Strength, MPa, ≥ (1100 ℃ -room temp. for 5 times) | - | 4.5 | 5.5 | 5 | 5 |
| Linear Change after firing at 1100 ℃ , % | - | ±0.4 | ±0.5 | ±0.4 | ±0.5 |