Product Introduction
Magnesia iron spinel brick is made of artificial spinel raw materials and special processes.
Features:
The product has the characteristics of high compressive strength, good thermal shock stability, good thermal creep performance, and high load softening temperature. At the same time, it also has the characteristics of direct bonding with magnesia-chrome bricks and easy adhesion to the kiln lining, which solves the problem of magnesia-chrome bricks used in cement kilns generating hexachrome potassium during use and causing environmental pollution.
Technical Data
| Item | Magnesia-iron spinel brick | High toughness magnesia-iron spinel brick |
| MgO% ≥ | 85 | 88 |
| Fe2O3% | 5-7.5 | 5-6 |
| SiO2% ≤ | 2 | 1.5 |
| Al2O3% ≤ | 3.0-5.0 | 4.0-7.0 |
| apparent porosity% ≥ | 17 | 16 |
| volume density g/cm3 ≥ | 3 | 2.9 |
| cold compressive strength Mpa ≥ | 45 | 55 |
| 0.2MPa refractoriness under load, ℃ ≥ | 1600 | 1650 |
| Thermal shock stability(1100℃~water cooling), times ≥ | 6 | 8 |
| Thermal conductivity W/MK ≤ | 2.6 | 2.6 |
| Thermal expansion % （1400℃） ≤ | 1.6 | 1.7 |