Magnesia carbon refraqctory bricks are made of high-pure magnesium sand powder, carbon materials (including graphite) and caramel asphalt or resin as raw materials. After the ingredients, heat mixing, and molding, they are baked by about 300 ° C or above 1000 ° C. The brick has the characteristics of anti-slag erosion, slag permeability, thermal shock stability, and thermal conductivity.
MgO(≥): 69% – 85%;
C (≥): 5% – 18%;
Bulk Density: 2.87g/cm³ – 3.15g/cm³;
Cold Crushing Strength: 30MPa – 50MPa;
Technical Data
| Item | MT-8A | MT-8B | MT-10A | MT-10B | MT-12A | MT-12B | MT-14A | MT-14B | MT-16A | MT-16B | MT-18A | MT-18B | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| MgO, % | ≥ | 82 | 81 | 80 | 79 | 78 | 77 | 76 | 74 | 74 | 72 | 72 | 70 |
| C, % | ≥ | 8 | 8 | 10 | 10 | 12 | 12 | 14 | 14 | 16 | 16 | 18 | 18 |
| Apparent Porosity, % | ≤ | 4.5 | 5.0 | 4.0 | 4.5 | 4.0 | 4.0 | 3.5 | 3.5 | 3.5 | 3.5 | 3.0 | 3.5 |
| Bulk Density, g/cm³ | ≥ | 3.05 | 3.00 | 3.02 | 2.97 | 2.97 | 2.94 | 2.95 | 2.90 | 2.92 | 2.87 | 2.89 | 2.84 |
| Cold Crushing Strength, MPa | ≥ | 45 | 45 | 40 | 40 | 40 | 35 | 38 | 35 | 35 | 35 | 35 | 30 |
Applications
Magnesia carbon bricks are mainly used in the lining of converters, AC electric arc furnaces, DC electric arc furnaces, and slag lines of ladles in the steelmaking industry.
