Description
Alumina-magnesia carbon brick is a kind of refractory product made from premium-grade bauxite or corundum sand, magnesia, and flaky graphite as the main raw materials. Their key feature is that, at high temperatures, they not only exhibit high corrosion resistance and resistance to spalling due to their carbon content, but also show a high residual linear expansion rate because of the formation of spinel during use.
Specification
| Item | Grade | ||||
| LMT75 | LMT70 | LMT65 | LMT60 | LMT55 | |
| ω(Al2O3) /%≥ | 75 | 70 | 65 | 60 | 55 |
| ω(Al2O3+ MgO) /%≥ | 81 | 77 | 80 | 75 | 72 |
| ω(C) /%≥ | 5 | 5 | 7 | 7 | 8 |
| Apparent Porosity/%≤ | 7.0 | 7.0 | 7.0 | 7.0 | 7.0 |
| Bulk density/(g/cm³)≥ | 3.20 | 3.15 | 3.10 | 3.00 | 2.90 |
| Cold Crushing Strength/MPa≥ | 60 | 60 | 60 | 50 | 50 |
Applications
Mainly used in the steel industry, such as the furnace mouth, slag line, and charging side of converters; the furnace walls and furnace bottom of electric arc furnaces; the slag line area of ladle linings; and the slag line and wall of molten iron ladles.
