Magnesium-iron composite spinel brick is a new product for cement kilns.
Magnesium iron composite spinel bricks are made of composite spinel bricks and high-purity magnesia as the main raw materials, added with specific mineralizers, and are formed by high pressure molding and high temperature sintering. It is a new generation of alkaline refractories with the highest technical content. Mainly used in the firing zone of large scale new-dry cement kilns: MgO--Fe2O3--Al2O3 spinel and periclase are the main crystal phases.Magnesium-iron composite spinel brick is a new product for cement kilns.
| Item | Magnesium iron composite spinel bricks | |||
| MFe-85A | MFe-85B | MFe-80A | MFe-80B | |
| MgO % ≥ | 85 | 85 | 80 | 80 |
| Al2O3 %≥ | 3-5 | 3-5 | ||
| Fe2O3% | 4-6 | 4-6 | 5-7 | 5-7 |
| Bulk density (g/cm3) ≥ | 2.95 | 2.93 | 3.0 | 3.0 |
| Cold crushing strength (Mpa) ≥ | 55 | 50 | 50 | 50 |
| Load softening temperature(TO.6℃) ≥ | 1600 | 1550 | 1600 | 1550 |
| Thermal shock stability (950℃ air cooling) , times ≥ | 100 | 90 | 100 | 90 |
| Thermal Conductivity(1000℃) (W/m.k) ≤ | 2.6 | 2.6 | 2.8 | 2.6 |
| Thermal expansion modulus(1400℃) % | 1.6 | 1.6 | 1.7 | 1.6 |
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