- Mob/WhatsApp/Skype/Whchat: +86 18103817770
- E-mail: info@magnesiumbrick.com
Product description of magnesia carbon brick
Magnesium carbon brick is made of high purity magnesium powder, carbon material (including graphite) and tar pitch or resin by batching, hot mixing and molding, roasted at about 300℃ or above 1000℃.
Parameters of magnesia carbon brick
| Type | Apparent Porosity % ≤ | Bulk Density g/cm³ | Cold Crushing Strength MPa ≥ | MgO % ≥ | C ≥ |
| MT-5A | 5 | 3.15±0.08 | 50 | 85 | 5 |
| MT-5B | 6 | 3.10±0.08 | 50 | 84 | 5 |
| MT-5C | 7 | 3.00±0.08 | 45 | 82 | 5 |
| MT-8A | 4.5 | 3.12±0.08 | 45 | 82 | 8 |
| MT-8B | 5 | 3.08±0.08 | 45 | 81 | 8 |
| MT-8C | 6 | 2.98±0.08 | 40 | 79 | 8 |
| MT-10A | 4 | 3.10±0.08 | 40 | 80 | 10 |
| MT-10B | 4.5 | 3.05±0.08 | 40 | 79 | 10 |
| MT-10C | 5 | 3.00±0.08 | 35 | 77 | 10 |
| MT-12A | 4 | 3.05±0.08 | 40 | 78 | 12 |
| MT-12B | 4 | 3.02±0.08 | 35 | 77 | 12 |
| MT-12C | 4.5 | 3.00±0.08 | 35 | 75 | 12 |
| MT-14A | 3.5 | 3.03±0.08 | 40 | 76 | 14 |
| MT-14B | 3.5 | 2.98±0.08 | 35 | 74 | 14 |
| MT-14C | 4 | 2.95±0.08 | 35 | 75 | 14 |
| MT-16A | 3.5 | 3.00±0.08 | 35 | 74 | 16 |
| MT-16B | 3.5 | 2.95±0.08 | 35 | 72 | 16 |
| MT-16C | 4 | 2.90±0.08 | 30 | 70 | 16 |
| MT-18A | 3 | 2.97±0.08 | 35 | 72 | 18 |
| MT-18B | 3.5 | 2.92±0.08 | 30 | 70 | 18 |
| MT-18C | 4 | 2.87±0.08 | 30 | 69 | 18 |
Magnesium carbon brick in ladle application
When magnesia carbon bricks are used in refining ladle furnace and ladle, they are mainly used in the net and slag line and other parts. According to the operating conditions, these parts require the refractory materials used must have high temperature resistance, thermal shock, resistance to mechanical corrosion caused by slag erosion. So in the past these parts used to choose magnesium-chromium refractories, but considering the chromium pollution of the environment, its dosage has been reduced, and now the choice of magnesium carbon bricks.
Due to the preheating process of new ladle in the magnesium carbon brick will be seriously damaged, loose decarburization layer can reach 30 ~ 60mm thick. This layer with the injection of steel in the process that is washed off and the magnesium sand particles into the molten slag. Obviously, to prevent the carbon in the magnesium carbon brick in the preheating is burned off will become one of the important steps to improve the ladle headroom and slag line parts of the magnesium carbon brick life. Its technical measures, in addition to the magnesia carbon brick with compound anti-oxidant, the key is in the lining after the surface of the magnesia carbon brick with alkali-containing low-melting glass phase liquid cover, in order to protect the magnesia carbon brick in the preheating process of the steel ladle carbon is not burned off.