Magnesia Chrome Brick - For Steel and Nonferrous Furnace

Magnesia chrome brick is a type of basic refractory brick produced by combining magnesia and chromite in specific proportions, followed by either high-temperature sintering or chemical bonding. These refractory bricks are primarily used in high-temperature industrial applications, such as steel refining and non-ferrous metal processing. Because the key advantage is an ability to withstand temperatures exceeding 1650°C.

Technical Data of REBO Magnesia Chrome Brick

The key indicators are MgO and Cr₂O₃ content, which define the brick’s composition, together with bulk density, apparent porosity, cold crushing strength and refractoriness under load, which reflect structure and performance at high temperature. The values shown are typical, and actual results may vary slightly by batch. Customized grades of magnesite refractory bricks are available on REBO Refractory. Besides, our factory provides test report with each bacth of shipment. Here are detailed technical parameters of REBO magnesium chromium brick:

Item/Grade		MGe-16A	MGe-16B	MGe-12A	MGe-12B	MGe-8A	MGe-8B
MgO, %	≥	50	45	60	55	65	60
Cr2O3, %	≥	16	16	12	12	8	8
Apparent Porosity, %	≤	19	22	19	21	19	21
Cold Crushing Strength, MPa	≥	35	25	35	30	35	30
0.2MPa Refractoriness Under Load, ℃	≥	1650	1550	1650	1550	1650	1530

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Grades of Magnesia Chrome Brick – Different Bonding Types

Magnesia chrome bricks are classified by how their grains are bonded together, which depends on the raw materials and the firing process. The bond type has a direct effect on performance, mainly the balance between resistance to thermal shock and resistance to slag attack. This section introduces five common types: silicate-bonded, direct-bonded, rebonded, semi-rebonded and chemically bonded bricks. For each one, we describe the main raw materials, sintering method, key advantages and typical use, to help you choose the right type for your furnace conditions. Stay updated with new products and technical articles by following us on Facebook.

Sintered Magnesia Chrome Brick

Main Materials: 89%-92% MgO, Chromite;
Process: After molding and drying, the brick will be sintered in a kiln at 1500°C–1600°C. It’s also called silicate-bonded magnesia-chrome bricks.
Features: Low cost and mature process. Sintered magnesia chrome brick is suitable for secondary areas with less demanding requirements regarding thermal load and slag erosion.

Direct Bonded Magnesia Chrome Brick

Main Materials: 95%-97% MgO, Chromite;
Process: Sintered at high temperatures in a kiln at over 1700°C. Through this high-temperature sintering, magnesite and chromite grains become directly bonded.
Features: Good strength at high temp and superior resistance to thermal shock. This bricks are suitable for applications involving significant temperature fluctuations and frequent thermal shock.

Fused Rebonded Magnesia Chrome Brick

Main Materials: Fused magnesia and chromite.
Process: Melting the magnesia and chromite in an electric arc furnace. Then crush, mix and subject them to high-temperature sintering kiln. This process allows for the maximum preservation of the raw material purity.
Features: Dense structure with high resistance to slag erosion and penetration. It’s suitable for areas subject to severe slag attack.

Chemical Bonded Magnesia Chrome Brick

Main Materials: MgO, chrome, and chemical bonding agents.
Process: Magnesia and chrome are shaped and dried at low temperatures, then solidified using chemical bonding agents; the bricks do not undergo high-temperature sintering.
Features: Ideal for cases where high-temperature performance requirements are less stringent or where rapid delivery of custom-shaped magnesia-chrome bricks is necessary.

Main Application of Magnesia Chrome Bricks

Magnesia chrome bricks are used in the most demanding zones of furnaces in the steel and metallurgical industries. These zones face high temperatures, slag attack, chemical reactions and sudden temperature changes at the same time. The mag chrome bricks are made from magnesia and chromite. Therefore, the basic composition and spinel based structure give them good resistance to slag erosion and stable performance at high temperature.

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Steel and Iron Furnace

RH (Ruhrstahl–Heraeus) Vacuum Degassing: Snorkel, lower vessel, throat and other linings with vacuum working environment;

AOD (Argon Oxygen Decarburization) Converter: Furnace walls, slag lines, tuyeres, and other areas, in combination with other refractory materials

VOD (Vacuum Oxygen Decarburization) Furnace: Furnace walls, slag lines and other high temperature slag reaction zones.

$Magnesia Chrome Brick nonferrous-furnace Refractory Bricks for Sale$

Non-Ferrous Metallurgy Furnace

Copper Converter: Furnace walls, slag lines, and areas in the vicinity of the tuyeres (or lances).

Copper Smelting Furnaces: Specific linings for flash smelting furnaces, as well as for certain partial smelting and converting equipment.

Other Non-ferrous Furnace: Furnace walls of smelting furnaces, converters, and settling furnaces (used for nickel, lead, etc.), as well as areas such as slag lines that are subject to high-temperature erosion by alkaline slag;

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Magnesia Chrome Brick nonferrous-furnace2

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$Magnesia Chrome Brick cement-kiln Refractory Bricks for Sale$

Cement Kiln Refractory

Cement rotary kiln: Specific zones such as the burning zone and transition zone.

Other Sections: Categorized based on factors including the alkaline environment, temperature, and the refractory material system.

Glass Furnace Refractory

Glass Melting Furnace: Portions of the regenerator and other areas where material compatibility has been verified.

Regenerator: Components that must withstand high temperatures and alkali vapors; evaluation should also take into account temperature conditions and glass quality requirements.

REBO Cases of Magnesia Chrome Brick

REBO Refractory supplies magnesia chrome bricks to customers in the cement, steel and non-ferrous metals industries around the world. Our long-term partners include Al-Badia in the cement industry, PSM and PSOCO in the steel industry, and RUSAL, BSC and ACC in the non-ferrous metals industry. Our magnesia chrome bricks have been shipped to South Korea, Turkey, Brazil, Chile and Indonesia, where they serve demanding high-temperature furnace conditions. With export experience in more than 50 countries and regions, we can support your project with suitable brick selection, export packing and delivery documents. Send us your furnace conditions to get a recommendation and quote.

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Magnesia Chrome Brick Factory – REBO Refractory

REBO Refractory has more than 20 years of experience in producing refractory bricks. Our factory was upgraded in 2025 and now operates one tunnel kiln and two shuttle kilns for firing magnesia chrome bricks. The upgraded kilns improve the densification of the bricks during sintering and make production more efficient, which supports stable quality and reliable delivery for your projects. Combined with our raw material inspection and laboratory testing, this gives you magnesia chrome bricks you can specify with confidence.

REBO Magnesia Chrome Brick Factory