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Kerui - Magnesia Chrome Brick
Magnesia chrome brick is mainly made of magnesite and chromite as the main raw materials. They are alkaline refractory materials. Due to the differences in composition and manufacturing processes, the performance of magnesia chrome bricks also varies. Kerui Refractory can recommend the appropriate type of magnesia chrome bricks and design solutions based on the customer’s kiln situation.
- MgO: ≥45-65%;
- Cr2O3: ≥8-16%;
- Refractoriness Underload: 1530-1650ºC;
- Cold Crushing Strength: 25-35MPa;
- Size: 230*114*65mm (standard)/And other sizes
Kerui Refractory offers four types of magnesia chrome bricks, including ordinary sintered magnesia carbon bricks, directly combined magnesia chrome bricks, fused magnesia chrome bricks, and unfired magnesia chrome bricks. The above parameters are for ordinary sintered magnesia chrome bricks. If you need parameters for other types, please contact us.
- Ordinary sintered magnesia chrome bricks: MGe8/MGe12/MGe16;
- Directly combined magnesia chrome bricks: SRMGe16/SRMGe18/SRMGe20/SRMGe22/SRMGe26;
- Fused magnesia chrome bricks: RMGe12/RMG14;
- Unfired magnesia chrome bricks: DMGe8/DMGe12/DMGe16.
Introduction to Magnesia Chrome Bricks
Magnesia chrome bricks are mainly produced through sintering. These magnesia refractory bricks can be used in various high-temperature industrial applications. Its main components are magnesium oxide and Cr2O3. The combination of magnesium oxide and Cr2O3 gives this brick several advantages.
- Magnesium oxide serves as the primary component. It has high temperature resistance, corrosion resistance, and good thermal shock stability.
- Cr2O3 serves as the second major component. It can enhance the performance of magnesia chrome bricks, such as refractoriness, corrosion resistance, and thermal shock stability.
Classification of Chrome Magnesite Bricks
Magnesia chrome bricks are mainly classified into sintered magnesia chrome bricks, fused magnesia chrome bricks, and chemically bonded magnesia chrome bricks according to the production process. These high temp refractory bricks have slightly different chrome magnesite bricks properties.
Sintered Magnesia Chrome Bricks
Sintered magnesia chrome bricks are made by high-temperature firing of magnesia sand, chrome ore, and other raw materials. They are mainly divided into ordinary sintered magnesia chrome bricks and directly bonded magnesia chrome bricks. They have high strength and density and are commonly used in industries such as steel smelting and non-ferrous metal smelting.
- Ordinary sintered magnesia chrome bricks are made of impure magnesia and chromium oxide sintered at high temperatures of 1550 degrees Celsius. The sintering temperature is not high.
- Direct bonded magnesia chrome bricks are made by sintering high-purity magnesia and chromium oxide at temperatures above 1700 degrees Celsius. They have better high-temperature resistance and corrosion resistance than ordinary sintered magnesia chrome bricks.
Fused Magnesia Chrome Bricks
Fused magnesia chrome bricks are formed by molding magnesia chrome sand after high-temperature melting in an electric arc furnace. They have high density and low porosity. And they are commonly used in industries such as glass kilns and cement kilns.
Chemically Bonded Magnesia Chrome Bricks
Chemically bonded magnesia chrome bricks are pressed from magnesia sand and chrome ore at low temperatures. They are characterized by low cost and easy construction. And they are applied in specific environments.
High Temperature Resistance
Magnesia chrome bricks KR Refractory offers have a refractoriness of up to 1700 degrees Celsius, with a softening temperature range between 1500-1650 degrees Celsius. They exhibit high refractoriness.
Strong Resistance to Alkali Slag Erosion
The magnesia and chromium oxide in magnesia chrome bricks have good corrosion resistance in alkaline environments. They demonstrate excellent chemical stability in alkaline slag. The chromium oxide is helpful to form a protective layer that enhances corrosion resistance.
Strong Resistance to Spalling
Magnesia chrome bricks have a strong ability to resist spalling or peeling under thermal cycling or mechanical stress. This allows them to maintain structural integrity in high-temperature mechanical conditions.
Environmental Friendliness
The raw materials for magnesia chrome bricks are sourced from natural materials. And their production process is environmentally friendly. Importantly, they can be recycled repeatedly, helping to reduce resource consumption.