Magnesia bricks are mainly used for steel-making alkaline open hearth, electric furnace bottom and wall, oxygen converter lining, non-ferrous metal smelting
We offer high-purity magnesia bricks and other composite magnesia bricks. Shown here are the parameters of high-purity magnesia bricks.
| Item | M-98 | M-97A | M-97B | M-95 | M-91 | |
|---|---|---|---|---|---|---|
| MgO, % | ≥ | 97.5 | 97.0 | 96.5 | 95.0 | 91.0 |
| SiO2, % | ≤ | 1.00 | 1.20 | 1.50 | 2.00 | / |
| CaO, % | ≤ | / | / | / | 2.00 | 3.00 |
| Apparent Porosity, % | ≤ | 16 | 16 | 18 | 16 | 18 |
| Bulk Density, g/cm³ | ≥ | 3.00 | 3.00 | 2.95 | 2.90 | |
| Cold Crushing Strength, MPa | ≥ | 60 | 60 | 60 | 60 | |
| 0.2MPa Refractoriness Under Load, ℃ | ≥ | 1700 | 1700 | 1650 | 1560 | |
| Permanent Linear Change, % | 1650℃*2h -0.2~0 |
1650℃*2h -0.3~0 |
1600℃*2h -0.5~0 |
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Magnesite bricks are mainly made from natural magnesite materials, with a magnesium oxide content of over 89%. The melting point of magnesite is as high as 2800ºC, making bricks highly refractory. Depending on the production process and properties, magnesia bricks are divided into burned magnesia bricks and chemically bonded magnesia bricks.
Burned Magnesite Refractory Bricks
Burned magnesia bricks are produced by high-temperature firing of raw materials. These high temperature refractory bricks have high refractoriness, strong resistance to high temperatures, and good alkali resistance, making them suitable for high-temperature alkaline working environments. Common types of burned magnesia bricks include magnesia refractory bricks, magnesia-alumina bricks, magnesia-chrome bricks, magnesia-iron spinel bricks, magnesia-calcium bricks, and others.
Chemically Bonded Magnesium Bricks
Chemically bonded magnesia bricks, also known as unburned magnesia bricks, are formed by mixing raw materials at room temperature. They exhibit good alkali resistance, seismic resistance, and abrasion resistance, making them more suitable for applications with high mechanical performance requirements. Common types of chemically bonded magnesia bricks include alumina magnesia carbon bricks, magnesia carbon bricks, magnesia calcium carbon bricks, and others.
High Density
Magnesia bricks have a high mineral content. They are dense and exhibit good resistance to penetration and leakage. They effectively prolong the lifespan of materials.
Strong Resistance to Spalling
Magnesia bricks have a strong resistance to alkaline slag erosion, such as iron oxide and calcium. They contain a high proportion of magnesium oxide, which helps maintain stability in alkaline environments.
High Heat Resistance
They have a high load softening temperature, with high-purity magnesia bricks reaching temperatures of up to 1800 degrees Celsius. Magnesia bricks maintain structural stability in high-temperature environments, resisting deformation or cracking.
High Thermal Conductivity
Magnesium oxide bricks efficiently transfer heat, improving temperature uniformity in furnaces. This accelerates heat treatment processes and reduces energy consumption.
Moderate Expansion
Magnesia bricks typically exhibit a linear expansion rate of 1.0-2.0% between 1000-1600 degrees Celsius. Moderate expansion at high temperatures helps maintain structural stability.
Strong Abrasion Resistance
Magnesium oxide has high hardness, making magnesia bricks resistant to wear in high-temperature environments. They are suitable for use in high-temperature environments requiring strong abrasion resistance.
Magnesia bricks are mainly used for steel-making alkaline open hearth, electric furnace bottom and wall, oxygen converter lining, non-ferrous metal smelting furnace, high temperature tunnel kiln, short magnesia brick and cement rotary kiln lining, furnace bottom and wall of heating furnace, glass Kiln regenerator, etc.
If you would like to know the detailed price of magnesia bricks, please send us your requirements. The price of magnesia bricks varies depending on the quantity, size, and composition. Ronghua Refractory, as a manufacturer of magnesia bricks, provides competitive prices and services. To determine the detailed requirements of customers, please send us the following information:
Ronghua Refractory has over 20 years of experience in the magnesia brick industry. Many customers choose us not only for our strong company capabilities but also for our comprehensive services.
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