Magnesite bricks are typical basic refractory bricks, which’s primary crystalline phase is magnesite. Magnesite bricks can be divided into fused magnesite bricks, burned magnesite bricks and unburned magesite bricks. Burned magnesite bricks can be divided into silicate bonded magnesite brick, direct bonded magnesite bricks, re-boned magnesite bricks, semi-rebonded magnesite bricks, etc. Unburned magnesite bricks can be divided into chemical bonded magnesite bricks and pitch bonded magnesite bricks. Meanwhile, magnesite can be used to produce composite refractory bricks such as magnesite carbon bricks, magesite spinel bricks, magnesite alumina bricks, magnesite alumina spinel bricks, magnesite chrome bricks, magnesite dolomite bricks, etc.
Magnesite Bricks Properties
Excellent erosion resistance, corrosion resistance.
High refractoriness and good thermal shock resistance.
Good slag build up resistance and slag corrosion resistance.
High strength, good spall resistance and creep resistance.
Magnesite Bricks Parameters
| Item | Model | |||
| MZ-89 | MZ-91 | MZ-95 | MZ-97 | |
| MgO % ≥ | 89 | 91 | 94.5 | 96.5 |
| CaO % ≤ | 3 | 2.5 | 2 | 1.5 |
| Apparent Porosity % ≤ | 20 | 18 | 17 | 16 |
| Cold Crushing Strength Mpa ≥ | 50 | 60 | 65 | 70 |
| 0.2Mpa Initial Soften Temperature ℃ | 1540 | 1550 | 1620 | 1700 |
| The Volume Density (g/m2) | 2.8 | 2.86 | 2.95 | 3.1 |
| Reheating Linear Change (%) 1650 ℃ 2h | 0.6 | 0.5 | 0.4 | 0.4 |
Magnesite Alumina Spinel Bricks Parameters
| Item | RSMS-80 | RSAS-85 | RSAS-90 | RSAS-93 |
| MgO % ≥ | 80 | 85 | 90 | 93 |
| SiO2 % ≤ | 3.0 | 1.0 | 2.0 | 1.0 |
| Al2O3% ≥ | 9 | 9 | 5 | 5 |
| Apparent Porosity%≤ | 19 | 18 | 18 | 18 |
| Bulk Density≥ | 2.85 | 2.95 | 2.9 | 2.95 |
| Cold Crushing Strength (Mpa) | 40 | 45 | 40 | 45 |
| RUL（0.2Mpa）℃ | 1650 | 1700 | 1700 | 1700 |
| Thermal Expansion % (1400℃) | 1.1 | 1.2 | 1.3 | 1.5 |
Magnesite Carbon Bricks Parameters
| Item | MC8 | MC10 | MC12 | MC14 | MC18 | |
| Apparent porosity%≤ |
5.0 | 4.0 | 4.0 | 3.0 | 3.0 | |
| Volume density g/cm3≥ |
3.00 | 3.00 | 2.98 | 2.95 | 2.92 | |
| Cold crushing strength MPa≥ |
50 | 40 | 40 | 35 | 35 | |
| Chemical composition% |
MgO ≥ | 84 | 82 | 76 | 76 | 72 |
| C ≥ | 8 | 10 | 12 | 14 | 18 | |
Magnesite Chrome Bricks parameters
| Items | MGe-20 | MGe-16 | MGe-12 | MGe-8 |
| MgO %≥ | 40 | 45 | 55 | 60 |
| Cr2O3%≥ | 20 | 16 | 12 | 8 |
| Refractoriness under load℃≥ | 1550 | 1550 | 1550 | 1550 |
| Apparent porosity% ≤ | 23 | 23 | 23 | 24 |
| CCS Mpa≥ | 24.5 | 24.5 | 24.5 | 24.5 |
Based on application condition, such as continuous working temperature, chemical corrosion degree, thermal conductivity, mechanical strength, abrasion and so on, RS Kiln Refractory can supply you the most cost effective magnesite bricks which can not only meet your requirement, but also prolong the service life.
Magnesite bricks Applications
- Burned magnesite bricks are usually used in converter permanent lining, electric arc furnace permanent lining, AOD furnace permanent lining, metal mixer working lining, lime kiln, nonferrous metals industry, etc.
- Magnesite carbon bricks: converter working lining, electric arc furnace working lining, steel ladle working lining, VOD furnace working lining.
- Magnesite chrome brick: RH degasser working lining, VOD furnace working lining, Metal mixer working lining, lime kiln, melting furnace working lining.
- Magnesite Alumina Spinel Bricks: non ferrous metal metallurgy furnace lining, electric furnace lid, steel ladle inner lining, steel refinery vacuum processing equipment inner lining, cement kiln high temperature zone inner lining, glass kiln regenerative chamber and so on.
