Description of magnesia iron spinel bricks
Magnesia-iron spinel bricks are made of composite spinel and high purity magnesia with specific mineralising agents, high pressure moulding and high temperature sintering. It is a new generation of alkaline refractories with high technical content. It is mainly used in the firing belt of large dry process cement kilns.
Parameters of magnesia iron spinel bricks
| Name of indicator | KR-MFe-85A | KR -MFe-85B | KR -MFe-85C |
|---|---|---|---|
| MgO, % | 85 | 85 | 85 |
| Al2O3, % | 3-5 | 3-5 | 3-5 |
| Fe2O3，% | 4-6 | 4-6 | 4-6 |
| SiO2, % | 1.5 | 1.8 | 2 |
| Bulk density (g/cm³) | 2.95 | 2.93 | 2.9 |
| Open porosity, %, not more than | 17 | 17 | 17 |
| Cold crushing strength (mpa) ≥ | 55 | 50 | 45 |
| Fire resistance under load, (T6.0.9, )> | 1600 | 1550 | 1500 |
| Thermal shock resistance (air-cooled 950°C) (times), > | 100 | 90 | 90 |
| Thermal conductivity, W/m.K | 2.6 | 2.6 | 2.4 |
| Thermal expansion1400°C (%) | 1.6 | 1.6 | 1.6 |
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