Jundao (Henan) New Materials Co.,Ltd.
Jundao（Henan）New Materials Co.,Ltd.
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High alumina castable ladle self-flowing castable good construction performance
Corundum self-flowing castables are mainly used for the bottom of ladle, with fused white corundum as the main material, suitable micro-powder and dosage, the amount of cement is controlled at 3-4%, a small amount of anti-explosive agent and dispersant are added.
The corundum ladle self-flowing castable can meet the requirements of ladle masonry and use.
It has good performance:
1.Corrosion resistance, peeling resistance and good construction performance.
2.Good thermal shock stability and strength, and has micro-expansion to reduce the gap and avoid the penetration of molten steel.
3.Reduce the labor intensity of workers and unplanned stoppages, and increase the service life of ladle.
| Item | Corundum | High alumina | Alumina -spinel | Slag line | ||||
| Chemical composition | Al2O3 ≥ | 90 | 75 | 65 | 65 | 70 | 30 | |
| Al2O3+MgO ≥ | 10 | 8 | 50 | 86 | ||||
| Cr2O3 ≥ | 2 | |||||||
| SiO2 ≤ | 6 | |||||||
| Bulk density (g/cm³) | 110℃×24h ≥ | 2.80 | 2.6 | 2.4 | 2.6 | 2.7 | 2.7 | 2.8 |
| Cold crushing strength (MPa) | 110℃×24h ≥ | 70 | 50 | 30 | 30 | 35 | 25 | 20 |
| 1100℃×3h ≥ | 80 | 60 | ||||||
| 1500℃×3h ≥ | 50 | 45 | 50 | 40 | ||||
| 1550℃×3h ≥ | 35 | |||||||
| Bending strength (MPa) | 110℃×24h ≥ | 8 | 6 | 6 | 6 | 7 | 5 | |
| 1100℃×3h ≥ | 10 | 8 | ||||||
| 1500℃×3h ≥ | 10 | |||||||
| Permanent linear change | 1100℃×3h(%) | ±0.5 | ±0.5 | 0 ~ +1.0 | 0 ~ +1.0 | 0 ~ +1.2 | ||
| 1500℃×3h(%) | 0 ~ ±1.0 | |||||||
| 1550℃×3h(%) | ±1.0 | |||||||
| Application | Ladle bottom | Ladle permanent layer | Small and medium ladle | Slag line of small and medium ladle | Slag line and sealing part of large and medium ladle | |||
