Specifications
1.high strength
2.high service temperature
3.good thermal shock resistanc
Specifications
high alumina castable refractory
1.high strength
2.high service temperature
3.good thermal shock resistance
| ITEM | Dense refractory castable | Light-weight refractory castable | Clay | ||||||||
| Corundum | Corundum mullite stone | High Alumina | Clay | Corundum | Corundum mullite stone | High Alumina | Clay | ||||
| A-90 | A-75 | A-70 | A-40 | QA-90 | QA-70 | QA-60 | QA-40 | JN-1400 | JN-1500 | ||
| Al2O3 % | ≥90 | ≥75 | ≥70 | ≥40 | ≥90 | ≥70 | ≥60 | ≥40 | ≥50 | ≥60 | |
| Refractoriness C | ≥1790 | ≥1790 | ≥1750 | ≥1730 | ≥1790 | ≥1790 | ≥1750 | ≥1700 | SiO2≤40 | SiO2≤25 | |
| Bulk Density g/cm 3 | ≥2.9 | ≥2.5 | ≥2.4 | ≥2.2 | 1.2-1.8 | 0.8-1.6 | 0.6-1.4 | 0.6-1.4 | >2.3 | >2.4 | |
| Cold Crushing Strength( MPa | 110 C ×24h | ≥50 | ≥50 | ≥50 | ≥40 | 5-15 | 5-15 | 3-13 | 3-13 | ||
| 1500 C ×3h | ≥70 | ≥70 | ≥70 | ≥50 | 8-20 | 8-20 | 6-16 | 6-16 | |||
| Modulus | ×24h | ≥8 | ≥8 | ≥6 | ≥5 | 2-5 | 2-5 | ||||
| 1500 C ×3h | ≥10 | ≥10 | ≥8 | 1350C×3h≥6 | 1300C×3h≥5 | 1450C×3h≥5 | |||||
| Heat Conductivity /W.(m.K) ( 300 C±25 C ) | 0.4-0.6 | 0.4-0.6 | 0.3-0.5 | 0.3-0.5 | |||||||
Linear change rate % | 110 C ×4h | -0.2~0 | -0.2~0 | ||||||||
| 1500 C ×3h | ±0.5 | ±0.5 | ±0.5 | 1350C×3h±0.5 | ±0.6 | ±0.6 | 1450C×3h±0.6 | 1300C×3h±0.6 | 1300C×3h -0.2~+0.5 | 1450C×3h -0.2~+0.5 | |
| Max Working Temperature/ C | 1700 | 1600 | 1500 | 1400 | 1700 | 1600 | 1400 | 1300 | 1400 | 1500 | |
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