Products
Products
01 · Shaped Refractories for Rotary Kilns
JX Magnesia-Alumina Composite Spinel Brick
- Code
- JXMA
- Grades
- JXMA-85A · JXMA-85B
- 100
- Thermal shock resistance (950℃ air quench) cycles ≥
- 1700
- Refractoriness under load T0.6 ℃ ≥
- 65
- Cold crushing strength MPa ≥
JXMA-85A
JXMA-85A
JXMA-85A
Our magnesia-alumina spinel brick is made mainly from high-purity magnesia and fused spinel by high-pressure forming and high-temperature firing. It has excellent thermal shock resistance and high-temperature performance and strong resistance to alkali and sulphur dioxide attack, and is suitable for the upper transition zone of cement kilns.
Physical and chemical properties
| Property | JXMA-85A | JXMA-85B |
|---|---|---|
| MgO % ≥ | 83 | 80 |
| Al₂O₃ % ≥ | 9-13 | 9-13 |
| SiO₂ % ≤ | 1.5 | 2.0 |
| Apparent porosity % ≤ | 17 | 18 |
| Bulk density g/cm³ ≥ | 2.95 | 2.90 |
| Cold crushing strength MPa ≥ | 65 | 60 |
| Refractoriness under load T0.6 ℃ ≥ | 1700 | 1600 |
| Thermal shock resistance (950℃ air quench) cycles ≥ | 100 | 80 |
| Thermal expansion (1400℃) % | 1.4 | 1.4 |
| Thermal conductivity (1000℃) W/m·K ≤ | 2.9 | 2.9 |
| Abrasion loss (cc) ≤ | 8.0 | 8.0 |
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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