Products
Products
01 · Shaped Refractories for Rotary Kilns
JX Low-Conductivity Corundum-Mullite Composite Brick
- Code
- JXDDR
- Grades
- JXDDR-A · JXDDR-B
- 20
- Thermal shock resistance (1100℃ water quench) cycles ≥
- 1650
- Refractoriness under load T0.6 ℃ ≥
- 85
- Cold crushing strength MPa ≥
Low-conductivity corundum-mullite composite brick JXDDR-A
Low-conductivity corundum-mullite composite brick JXDDR-A
Low-conductivity corundum-mullite composite brick JXDDR-A
The JX low-conductivity corundum-mullite composite brick is produced by introducing a lightweight composite layer, followed by high-pressure forming and high-temperature firing.
The product not only has high strength and good thermal shock resistance but also low overall thermal conductivity; it is a third-generation energy-saving refractory for cement kilns and lime kilns.
Physical and chemical properties
| Property | Low-conductivity corundum-mullite composite brick JXDDR-A | Low-conductivity corundum-mullite composite brick JXDDR-B | Lightweight composite layer |
|---|---|---|---|
| Al₂O₃ % ≥ | 60 | 55 | 55 |
| Fe₂O₃ % ≤ | 1.5 | 1.5 | 1.5 |
| Apparent porosity % ≤ | 20 | 22 | 26 |
| Bulk density g/cm³ ≥ | 2.65 | 2.60 | 2.15 |
| Cold crushing strength MPa ≥ | 85 | 75 | 70 |
| Refractoriness under load T0.6 ℃ ≥ | 1650 | 1600 | 1500 |
| Thermal expansion (1400℃) % | 0.4 | 0.5 | 0.6 |
| Thermal conductivity (1000℃) W/m·K | 2.7 | 2.6 | 1.9 |
| Thermal shock resistance (1100℃ water quench) cycles ≥ | 20 | 15 | 10 |
These data are average results of production samples; typical values must not be regarded as maximum or minimum values.
Where product data differ from the goods actually supplied, the specifications in the supply contract or the actual test data of the batch prevail.
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