Magnesia Spines Brick
Magnesia Spinel Brick is manufactured from Puyang Refractories Group's proprietary high-purity microcrystalline magnesia and fused magnesia-alumina spinel, combined with special additives and processed through high-pressure pressing and a unique sintering technology.
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Erosion resistance
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Slag resistance
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Thermal shock resistance
Product Introduction
Magnesia Spinel Brick is manufactured from Puyang Refractories Group's proprietary high-purity microcrystalline magnesia and fused magnesia-alumina spinel, combined with special additives and processed through high-pressure pressing and a unique sintering technology.The brick is characterized by a dense structure, low apparent porosity, high hot strength, excellent thermal shock resistance, and superior slag corrosion resistance. It fully satisfies the demanding operating conditions of RH refining furnaces. Free from the generation of hexavalent chromium (Cr⁶⁺) during service, it is an environmentally friendly substitute for conventional magnesia-chrome bricks and an ideal solution for eliminating chromium pollution.
Product Specifications
| Index | Unburned article | Sintered article | ||
| HWUMA-95 | HWUMA-93 | HWMA-10 | HWMA-5 | |
| MgO+Al2O3（%） ≥ | 95 | 93 | 92 | 90 |
| Apparent Porosity（%） ≤ | 8 | 12 | 17 | 18 |
| Bulk Density（g/cm3 ） ≥ | 3.1 | 3 | 2.95 | 2.9 |
| Cold Compressive Strength（MPa） ≥ | 70 | 65 | 45 | 45 |
| 0.2MPa Refractoriness Under Load（T0.6 ℃) > | 1700 | 1700 | 1700 | 1700 |
| Hot Modulus of Rupture（1400×0 .5h）（MPa） ≥ | 15 | 10 | - | - |
| Thermal Shock Resistance（1100℃ Cycle） ≥ | 4 | 4 | 10 | 6 |
- Grade:
- HWUMA-95
- HWUMA-93
- HWMA-10
- HWMA-5
