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Buy high quality low price Magnesia dolomite bricks enhance performance reduce cost, at Wedge India we offer excellent supply and installation service to achieve target performance results.


Magnesia dolomite bricks are a type of refractory material made from a combination of magnesia (MgO) and dolomite (CaO.MgO) as the main components. These bricks are used in various high-temperature applications, particularly in industries such as steelmaking, cement production, and non-ferrous metal processing. Here are the key characteristics and uses of magnesia dolomite bricks:

  • Composition:

    • Magnesia (MgO): Provides high-temperature resistance, basic slag resistance, and thermal shock resistance.
    • Dolomite (CaO.MgO): Contributes to the refractory's chemical stability, improves slag resistance, and enhances thermal conductivity.
    • Additives: Various additives such as binders, antioxidants, and fillers may be included to enhance properties like strength, erosion resistance, and thermal performance.
  • High Temperature Resistance:

    • Magnesia dolomite bricks can withstand temperatures ranging from 1500°C to 1800°C (2732°F to 3272°F) encountered in steelmaking and other high-temperature processes without significant degradation.
  • Basic Slag Resistance:

    • The combination of magnesia and dolomite provides resistance to basic slag corrosion, which is common in steelmaking and other industries. This property helps extend the service life of the refractory lining.
  • Thermal Shock Resistance:

    • These bricks exhibit good thermal shock resistance, allowing them to withstand rapid temperature changes during heating and cooling cycles without cracking or spalling.
  • Chemical Inertness:

    • Magnesia dolomite bricks are chemically stable and resistant to alkalis, metal oxides, and other corrosive agents present in high-temperature environments, reducing the risk of chemical attack and erosion.
  • Thermal Conductivity:

    • The dolomite content in the bricks improves thermal conductivity, which can be advantageous in certain applications where efficient heat transfer is required.
  • Mechanical Strength:

    • These bricks have adequate mechanical strength to withstand mechanical stresses such as thermal expansion, contraction, and handling during furnace operation.
  • Applications:

    • Magnesia dolomite bricks are used in various industrial applications, including steelmaking converters, electric arc furnaces, cement kilns, non-ferrous metal smelting furnaces, and other high-temperature processes where slag resistance and thermal stability are essential.
  • Refractory Lining Design:

    • They are often part of a multi-layered refractory lining system designed to optimize performance, energy efficiency, and longevity in high-temperature industrial processes.

Overall, magnesia dolomite bricks offer a combination of thermal resistance, slag resistance, thermal shock resistance, chemical stability, and mechanical strength, making them suitable for demanding applications in harsh industrial environments.


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