Magnesia Brick

Magnesia Brick

  • MgO: 89-91%
  • Bulk Density: 2,34-2,38g/cm³
  • Refractoriness: 2000°C
  • Open porosity: 22%-26%
  • Standard Size: 230*114*65mm
  • Certification: ISO9001/ISO14001/ISO45001/ISO50001
  • Sample: sample testing available

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Characteristics of Magnesia bricks (China)

Name of indicatorM-98M-97AM-97BM-95AM-95BM-91M-89
MgO/%97.597.0 96.595.0 94.591.0 89.0
SiO2/%1.00 1.20 1.50 2.00 2.50 //
CaO/%///2.00 2.00 3.00 3.00
Apparent porosity /%16161816181820
Bulk density (g/cm³)3.00 3.00 2.952.90 2.85
Cold crushing strength/MPa6060606050
0.2MPa Refractoriness Underload/℃17001700165015601500
Permanent Linear Change/%Xmin~Xmax1650℃*2h
-0.2-0
1650℃*2h
-0.3-0
1600℃*2h
-0.5-0
1600℃*2h
-0.6-0

Characteristics of Magnesia bricks (Russia)

Name of indicatorП-91П-90П-89
MgO, %, ≥919089
CaO, %, ≤344,5
SiO2, %, ≤33-
Fe2O3, %, ≤2,52,5-
Open porosity, %, not more than222326
Compressive strength, N/mm², not less605040
Refractorines under load,, °С, not lower155015501500

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Description of magnesia bricks

Magnesia bricks are fired from magnesium manganates mixed with special additives and have a magnesium oxide content of at least 90%.
Magnesia brick is resistant to basic slags. It is highly refractory (2000° C), strong, dense, but has little heat resistance and is expensive.

Magnesia Brick

Magnesia Brick

Magnesia Brick

Преимущества периклазового (Магнезитового) кирпич

Good Resistance to slag

Magnesia brick is a basic refractory brick with high resistance to alkali slag such as CAO and FEO, and is often used as a masonry material for main kilns.

Good thermal conductivity

The thermal conductivity of magnesia bricks is several times higher than that of clay bricks, but the thermal conductivity of magnesia bricks decreases with increasing temperature.

High fire resistance

The fire resistance of magnesia bricks is above 2000 degrees Celsius. Magnesia brick is an excellent fireproof material that can withstand exposure to high temperatures without losing structural strength.

Durability and strength

Magnesia refractory brick has a long service life due to its resistance to high temperature and chemical attack. It is not easily damaged or destroyed and can stably perform the function of fireproof construction for a long time.

Application of Magnesia Bricks

Steel industry

In the steelmaking process, magnesia bricks are widely used in the lining and chimneys of converter furnaces, electric furnaces, heavy fuel oil heating furnaces and other equipment to ensure safe operation of the equipment.

Non-ferrous metallurgy industry

Magnesia bricks are also widely used in light metal smelting process, such as lining and protecting aluminum electrolyzers, aluminum alloy furnaces, magnesium alloy furnaces and other equipment.

Glass industry

Magnesia bricks can also be used in glass melting furnace. OH is also used as lining and chimney parts for furnaces, crucibles and pipes in the glass industry to ensure the quality and efficiency of glass production.

Chemical industry

Magnesia bricks can be used in sulfuric acid conversion furnaces, flue gas desulfurization equipment and other high-temperature and highly corrosive equipment to increase their service life.


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