
Direct combined magnesite chrome brick
Other name: Direct bonded MgO-Cr2O3 brick
Model Number: HCR 12,HCR 9B,HCR 9A,HCR 6,HCR 4
Certification: ISO 9001-14001
Minimum Order Quantity: 5 MT
Direct combined magnesite-chrome brick
Description:
Directly combined magnesite-chrome brick refers to a refractory product in which periclase and magnesite-chrome spinel are directly combined. The brick is made of high-purity sintered magnesite and chrome ore with SiO2 of less than 2% and is sintered by high temperature. Direct bonding refers to a combination of direct contact between solid phase grains. The degree of direct bonding of the article increases as the SiO2 content decreases and the firing temperature increases. The product has few impurities, is fired at high temperature and ultra-high temperature, and the glass phase is concentrated in the triangular region of the crystal phase, and the crystal phase and the crystal phase are directly combined.
Advantages:
Less impurities, low porosity, high strength, strong wear resistance, corrosion resistance, good thermal shock and anti-flaking
Application:
Electric arc furnaces, copper converter flash furnaces, RH, DH vacuum treatment equipment, furnace refining VOD furnaces, AOD furnaces, cement rotary kiln, etc.
Direct combined magnesite-chrome brick physical and chemical
| Item | HCR 12 | HCR 9B | HCR 9A | HCR 6 | HCR 4 |
| MgO min% | 60 | 70 | 70 | 75 | 80 |
| Cr₂O₃ min% | 12 | 9 | 9 | 6 | 4 |
| SiO₂ MAX% | 3.2 | 3 | 2.8 | 2.8 | 2.5 |
| Apparent porosity MAX % | 19 | 19 | 19 | 18 | 18 |
| Bulk Density g/cm³ | 3.0 | 2.98 | 2.98 | 2.95 | 2.93 |
| Cold Crushing Strength Mpa ≥ | 35 | 40 | 40 | 40 | 40 |
| Refractoriness under load of 0.2Mpa(℃) | 1580 | 1580 | 1600 | 1600 | 1600 |
| Thermal shock stability (1100℃ water cold)> | 4 | 4 | 4 | 4 | 4 |