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Magnesia Bricks

Magnesia Bricks

Magnesia Bricks

The refractoriness of magnesia bricks can reach above 2000°C. The softening temperature under load varies significantly based on the melting point of the bonding phase and the quantity of the liquid phase generated at high temperatures. Generally, the starting temperature of softening under load for magnesia bricks is between 1520°C and 1600°C, while high-purity magnesia bricks can reach 1800°C. The difference between the starting temperature of softening under load and the collapse temperature for magnesia bricks is not significant.

Magnesia Carbon Brick

Magnesia carbon bricks are made of high melting point alkaline oxide magnesium oxide (melting point 2800°C) and high melting point carbon materials that are difficult to be wetted by slag as raw materials, with various non-oxide additives added. Non-burning charcoal composite refractory material combined with carbon binder. Melting point 2800℃, chemical properties: high melting point alkaline oxide

Physical Properties & Chemical Composition For Magnesia Carbon Brick

ItemMC8MC10MC12MC14MC18
Apparent Porosity%≤5.04.04.03.03.0
Volume Density g/cm3≥3.003.002.982.952.92
Cold Crushing Strength MPa≥5040403535
Chemical Composition% Mgo≥8482767672
 C≥810121418
Applicationgeneral usecorrosion resistanceExtra Corrosion Resistance

Magnesia Chrome Brick

Magnesia-chromium bricks are mainly used in the metallurgical industry, such as building open hearth furnace tops, electric furnace tops, external refining furnaces and various non-ferrous metal smelting furnaces. The high-temperature part of the ultra-high-power electric furnace wall is made of fused magnesia-chromium bricks, the high-erosion area of the refining furnace outside the furnace is made of magnesia-chromium bricks made of synthetic materials, and the high-erosion area of the non-ferrous metal flash smelting furnace is made of fused-cast magnesia-chromium bricks and synthetic materials. Made of magnesia chrome bricks. In addition, magnesia-chrome bricks are also used in the firing zone of cement rotary kilns and the regenerator of glass kilns. The production process of fired magnesia chrome bricks is generally similar to that of magnesia bricks. In order to eliminate the problem of MgO, Cr2O3, Al2O3 or direct combination of magnesia chrome bricks during the firing process.

Common Magnesite Chrome Brick

ItemMGe6MGe8MGe12MGe16
MgO %80727065
 
Cr2O3 %
7101317
CaO %1.21.21.21.2
SiO2 %3.4444.2
Al2O3 %4.56.566
Fe2O3 %44.85.56.5
Apparent Porosity %
17181818
Bulk Density g/cm3
333.023.05
Cold Crushing Strength Mpa
555555 50
Refractoriness Under Load °C
 1600 1600 1600 1600

Direct-Bonded Magnesite Chrome Brick

ItemDMGe4DMGe8DMGe12DMGe16
MgO %85777469
 Cr2O3 %5.59.11418
CaO %1.11.41.21.2
SiO2 %1.31.21.21.5
Al2O3 %3.543.54.5
Fe2O3 %36.455.7
Apparent Porosity %18181818
Bulk Density g/cm33.023.043.063.08
Cold Crushing Strength Mpa505055 55
Refractoriness Under Load °C 1700 1700 1700 1700
Thermal expansion %
1000°C
 
1
 1 1 0.9
Thermal expansion %
1600°C
1.8 1.8 1.8 1.6
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