
Magnesite chrome brick
Other name: Magnesia-chrome brick
Model Number: HCR 12A, HCR 9A, HCR 8A, HCR 6, HCR 4
Certification: ISO9001-14001
Minimum Order Quantity: 5 MT
Silicate-bonded magnesite-chrome brick
Introduction:
The silicate-bonded magnesite-chrome brick is made by sintering magnesia sand and chrome ore as raw materials, mixing at an appropriate ratio, firing at a high temperature. The mineralogical composition of the product is periclase, spinel and a small amount of silicate.
Advantages:
Better thermal shock resistance, stable in high temperature.
Application:
Open-hearth furnaces, Electric furnaces, Non-ferrous metallurgical furnaces, Cement rotary kiln, Glass melting furnace regenerators.
Semi-recombined magnesite-chrome brick
Introduction:
The semi-recombined magnesite chrome brick is made of fused magnesite-chrome sand, magnesia sand, and chromite or pre-reacted magnesite-chrome sand.
Advantages:
Compact, Low porosity, High temperature strength, Better thermal shock resistance, Strong resistance to slag erosion.
Application:
Vulnerable parts of steelmaking electric furnace, RH and DH vacuum degassing device, Secondary refining slag line and Other serious erosive parts of VOD, LF, ASEA-SKF, AOD, Tuyere area of copper smelting converter, Cement rotary kiln firing zone, Glass Furnace regenerator.
Magnesite-chrome bricks phycial and chemical
| Item | HCR 8A | HCR 12A | HCR 9A | HCR 6 | HCR 4 |
| MgO min% | 82 | 75 | 70 | 75 | 80 |
| Cr₂O₃ min% | 8 | 12 | 9 | 6 | 4 |
| SiO₂ MAX% | 1.5 | 1.5 | 2.8 | 2.8 | 2.5 |
| Apparent porosity MAX % | 17 | 17 | 19 | 18 | 18 |
| Bulk Density g/cm³ | 3 | 3.05 | 3 | 2.95 | 2.93 |
| Cold Crushing Strength Mpa ≥ | 45 | 45 | 40 | 40 | 40 |
| Refractoriness under load of 0.2Mpa(℃) | 1700 | 1700 | 1600 | 1600 | 1600 |
| Thermal shock stability (950℃ air cold)> | 80 | 80 | 60 | 60 | 60 |
| Thermal Conductivity (1000℃)W/m.k ≤ | 2.8 | 2.8 | 2.8 | 2.9 | - |
| Therm.Exp (1400℃) % | 1.5 | 1.5 | 1.5 | 1.4 | - |