Magnesia Brick

 

 

| Magnesia Alumina Spinel Brick

 

Its main advantage lies in the seamless integration of the excellent alkali resistance of magnesia with the strong thermal shock and spalling resistance of the spinel phase. Additionally, it offers high resistance to slag corrosion and penetration, along with exceptional high-temperature stability.

 

Magnesia Alumina Spinel Brick

Magnesia Iron Spinel Brick

Magnesia Alumina Chrome Spinel Brick

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

| Magnesia Chrome Brick

 

It features excellent slag corrosion resistance, high-temperature stability, and good thermal shock resistance. It is mainly used as a lining material for steelmaking converters, electric-arc furnaces, and non-ferrous metal smelting furnaces (e.g., copper-nickel flash smelting furnaces). It also serves as a key lining brick for the burning zone and transition zone of cement rotary kilns and can be applied to the regenerators of glass melting furnaces, as well as other similar facilities.

 

 Fused Magnesia Chrome Brick

 Regular Bonded Magnesia Chrome Brick

 Direct-Bonded Magnesia Chrome Brick

 Semi-Rebonded Magnesia Chrome Brick

 

 

 | Other Magnesia Brick

 

Other magnesia-series refractory bricks include:

 

 Magnesia Carbon Brick

 Dolomite Brick

 Magneisa Forsterite Brick

 Magnesia Refractory Brick

 Alumina Magnesia Carbon Brick

 Magnesia Zirconia Brick

 

 

 

 

Contact me to send drawings for customization

 

 

 

Magnesia-series refractory bricks are refractory materials made primarily from magnesite (MgO), or combined with components such as alumina, chrome ore, carbon, and spinel. Their core properties center on high-temperature resistance, corrosion resistance, and structural stability, which are elaborated as follows:

 

1.Ultra-high refractoriness

Magnesite has a melting point as high as 2800℃, so the refractoriness of magnesia-series refractory bricks is generally ≥2000℃. These bricks can operate stably for long periods under high-temperature conditions above 1600℃, making them suitable for extreme high-temperature equipment such as steelmaking converters and cement rotary kilns.

 

2.Excellent resistance to alkaline slag corrosion

MgO is a strongly alkaline oxide that can react with components in alkaline slag to form stable, high-melting-point compounds. It effectively resists the corrosion and penetration of alkaline slag in the metallurgical and building materials industries and is the preferred refractory brick type for alkaline working conditions.

 

3.Good high-temperature mechanical properties

Magnesia-series bricks are not prone to softening or deformation at high temperatures, with a cold crushing strength ranging from 60 to 120 MPa. Some high-end brick types (such as direct-bonded magnesia-chrome bricks and magnesia-alumina spinel bricks) also exhibit excellent spalling resistance, allowing them to withstand thermal shocks caused by temperature fluctuations.

 

4.Strong adaptability of formulations and processes

The performance of these bricks can be adjusted by incorporating different auxiliary materials (such as alumina, chrome ore, graphite, and spinel):

Adding graphite enhances thermal shock resistance and slag resistance, producing magnesia-carbon bricks suitable for converters and ladles.

Adding alumina forms magnesia-alumina spinel, improving spalling resistance for applications in the burning zone of cement kilns.

Adding chrome ore strengthens corrosion resistance, producing magnesia-chrome bricks used in non-ferrous metal smelting furnaces.

 

5.Wide range of applicable working conditions

These bricks can withstand not only pure alkaline working conditions but also adapt to acid-alkali composite corrosive environments through component adjustment. They are widely used in various high-temperature industries, including steel, metallurgy, building materials, non-ferrous metals, and chemical engineering.

 

 

Magnesia-series refractory bricks are tailored to diverse high-temperature and corrosive working conditions through formula and process adjustments. Their common applications span the following core industries:

 

Iron and Steel Industry

Converter & Electric Furnace Linings: High-purity magnesia bricks and direct-bonded magnesia-chrome bricks are used to resist the erosion of high-temperature molten steel and alkaline slag.

Ladle & Tundish Linings: Magnesia-carbon bricks and magnesia-alumina spinel bricks are adopted for their excellent thermal shock resistance and slag penetration resistance, ensuring the stability of molten steel quality.

 

Building Materials Industry

Cement Rotary Kiln: Magnesia-iron spinel bricks and magnesia-alumina spinel bricks are applied to the burning zone and transition zone, withstanding the chemical corrosion of cement clinker and high-temperature mechanical wear.

Glass Melting Furnace: Fused magnesia-chrome bricks are used in regenerators and checker chambers, adapting to the erosion of molten glass and high-temperature flue gas.

 

Non-Ferrous Metal Smelting Industry

Copper and Aluminum Smelting Furnaces: Magnesia-chrome bricks and magnesia-alumina chrome spinel bricks are used for the linings of reverberatory furnaces and flash furnaces, resisting the corrosion of complex non-ferrous smelting slags.

 

Chemical & Environmental Protection Industry

Chemical Kilns & Waste Incinerators: Magnesia-zirconia bricks and semi-rebonded magnesia-chrome bricks are selected to cope with the erosion of acidic, alkaline, and chlorine-containing corrosive media.

 

Power Industry

Boiler Furnace Walls & High-Temperature Ducts: Lightweight magnesia bricks are used for heat insulation and fire resistance, balancing high-temperature stability and thermal insulation performance.

 

 

As one of the most professional magnesia brick manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to buy bulk customized magnesia brick from our factory. Contact us for sample.

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