Products
Products
04 · Refractories for Non-ferrous Smelting Furnaces
Magnesia-Alumina-Chrome Composite Spinel Brick
- Code
- JXMAG
- Grades
- JXMAG-A · JXMAG-B
- 100
- Thermal shock resistance (950℃ air quench) ≥
- 1700
- Refractoriness under load T0.6 ℃ ≥
- 50
- Cold crushing strength MPa ≥
JXMAG-A
JXMAG-A
JXMAG-A
The magnesia-alumina-chrome composite spinel brick is made mainly from high-purity magnesia and synthetic magnesia-alumina spinel by high-pressure forming and high-temperature sintering. It withstands high temperature, resists spalling and erosion, and strongly resists attack by SO₂, FeO, PbO and similar substances.
Its bulk density is moderate; in the reaction zone of zinc-volatilising kilns it effectively reduces the load on the supporting rollers, allows higher kiln speed, increases output and lowers consumption.
In high-temperature furnaces it has good resistance to reduction and spalling, and is suitable for reverberatory furnaces, fuming furnaces and other furnaces with high temperatures and large temperature fluctuations.
Physical and chemical properties
| Property | JXMAG-A | JXMAG-B |
|---|---|---|
| MgO % ≤ | 80 | 75 |
| Al₂O₃ % ≥ | 12 | 12 |
| Cr₂O₃ % ≤ | 3-5 | 3-5 |
| SiO₂ ≤ | 1.50 | 2.50 |
| Apparent porosity % ≤ | 17 | 18 |
| Bulk density g/cm³ ≥ | 3.0 | 2.95 |
| Cold crushing strength MPa ≥ | 50 | 45 |
| Refractoriness under load T0.6 ℃ ≥ | 1700 | 1650 |
| Thermal shock resistance (950℃ air quench) ≥ | 100 | 80 |
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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