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REFRACTORY MAGNESIA BRICK
Magnesia brick's main composition is magnesia and the content of magnesia is normally more than 90% and the main crystal is periclase. Magnesia bricks are generally divided into sintered magnesia brick and chemical combination magnesia refractory brick. For the sintered magnesia brick, direct contact type is called direct combination of magnesia brick; electric fused type is called reunited fused magnesia brick.
Features:
High refractoriness
Strong ability to resist basic alkaline slag.
Strong ability of thermal conductivity
Magnesia bricks are widely used in steel melting furnace lining, the ferroalloy fiber cable furnace in steel industry, non-ferrous metallurgical industry furnace (such as copper, lead, zinc, tin, lining), building materials industry kiln, glass industry body and heat exchanger regenerator grid, refractory material industry of high temperature calcination kiln, shaft kiln, tunnel kiln, etc.
|
Description |
Mg-B 91 |
Mg-B 92 |
Mg-B 93 |
Mg-B 95 |
Mg-B 97 |
|
MgO (%) |
≥91 |
≥92 |
≥93 |
≥95 |
≥97 |
|
SiO2 (%) |
≤4 |
≤3.5 |
≤2.5 |
≤2 |
≤2 |
|
Fe2O3 (%) |
≤1.3 |
- |
- |
≤1.2 |
≤1.2 |
|
CaO (%) |
≤2.5 |
≤2.5 |
≤2 |
≤1.8 |
≤1.8 |
|
Porosity (%) |
≤18 |
≤18 |
≤18 |
≤18 |
≤18 |
|
Bulk density, g/cm3 |
2.86 |
2.9 |
2.95 |
2.92 |
2.95 |
|
Cold crusjing strength (Mpa) |
≥60 |
≥60 |
≥50 |
≥60 |
≥60 |
|
Refractoriness under load, 0.2Mpa T0.6 °C |
≥1570 |
≥1560 |
≥1620 |
≥1650 |
≥1700 |
|
Thermal shock resistances 100°C water cycles |
18 |
18 |
18 |
18 |
18 |
