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High-alumina low-creep fire-resistant ball
product Overview:
High-alumina low-creep fire-resistant ball is a solid sphere made by mixing, molding and firing refractory aggregate, refractory powder and binder. According to the physical and chemical indicators are divided into RQA-55, RQA-65, RQA-75, RQA-80, RQAD-70 five brands. According to the diameter, it is divided into six specifications: φ18mm, φ25mm, φ40mm, φ50mm, φ60mm, and φ80mm. It is mainly used for kiln such as ball-type hot air furnace and heating furnace.
product Overview:
| Item | High aluminum refractory ball | Low Creep Refractory Ball | |||
| RQA-55 | RQA-65 | RQA-75 | RQA-80 | RQAD-70 | |
| Al2O3 % ≥ | 55 | 65 | 75 | 80 | 70 |
| Fe2O3 % ≤ | - | - | 1.8 | 1.6 | 1.8 |
| Bulk Density g/cm³ ≥ | 2.1 | 2.3 | 2.5 | 2.7 | 2.6 |
| Apparent porosity % ≤ | 28 | 26 | 24 | 22 | 24 |
| Withstand voltage value at room temperature KN ≥ | 8 | 10 | 15 | 25 | 15 |
| Load softening start temperature (100N / ball) ℃ ≥ | 1400 | 1450 | 1480 | 1530 | 1550 |
| Thermal shock stability (1100 ° C, water-cooled) ≥ | 15 | 15 | 15 | 10 | 15 |
| Creep rate (100N / ball，1400℃×50h） % | ≤1.0 | ||||
+86-13183003859
+86-13903828086