Magnesium-chromium brick
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Heavy refractory brick
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Details Introduction
Magnesia-chrome bricks are refractory material products mainly composed of magnesium oxide (MgO) and chromium trioxide (Cr₂O₃), with periclase and spinel as the main mineral components. These bricks have high refractoriness, high-temperature strength, strong resistance to alkaline slag erosion, excellent thermal shock stability, and considerable adaptability to acidic slag. The main raw materials for manufacturing magnesia-chrome bricks are sintered magnesite and chromite. The purity of the magnesite raw material should be as high as possible.ProjectDirectly bonded magnesia-chrome bricksOrdinary magnesia-chrome bricksMgO%
| ≥80 |
≥75 |
≥70 |
|||
| ≥65 |
≥63 |
Cr₂O₃% |
≥6.0 |
≥8.0 |
≥9.0 |
| SiO |
% |
≤2.8 |
≤1.8 |
≤2.8 |
≤1.8 |
| Apparent porosity %Project≤18 |
≤17 |
≤19 |
≤17 |
- |
- |
| ≤21 |
Bulk density g/cm |
≥2.9 |
≥2.95 |
≥2.98 |
≥2.98 |
| Room temperature compressive strength MPaOrdinary magnesia-chrome bricks |
≥40 |
≥50 |
≥35 |
≥40 |
≥50 |
| ≥30 |
Load softening temperature ℃ |
≥1550 |
Load softening temperature ℃ |
≥1600 |
≥1530 |
| 荷重软化温度 ℃ |
≥1550 |
≥1600 |
≥1600 |
≥1530 |
≥1530 |
Key words:
Magnesium-chromium brick
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