Magnesia Refractory Brick

Magnesia refractory brick is an alkaline refractory material mainly composed of magnesite as the main crystal. Magnesium oxide content is as high as 97.5%. This type of brick can be used at 1750℃. It is widely used in various high-temperature industrial fields. Kerui Refractory offers different kinds of magnesia bricks for more than 1000+ partners from worldwide.

  • MgO: ≥91.0-97.0%;
  • Apparent Porosity: 16-18%;
  • Bulk Density: 2.90-3.00g/cm³;
  • Cold Crushing Strength: 60MPa;
  • Size: 230*114*65mm (standard) and other sizes;
  • Delivery: 15-30 working days;
Free Sample Available to Any Country
High Heat Resistance
Environmentally Friendly
Rapid Hardening
Easy Construction
Magnesia Brick - Kerui

Specification Data of Magnesia Refractory Bricks

Kerui Refractory offers high-purity magnesia bricks and other composite magnesia bricks. Shown here are the parameters of high-purity magnesia bricks.

MgO, %97.597.0 96.595.0 91.0
SiO2, %1.00 1.20 1.50 2.00 /
CaO, %///2.00 3.00
Apparent Porosity, %1616181618
Bulk Density, g/cm³3.00 3.00 2.952.90
Cold Crushing Strength, MPa60606060
0.2MPa Refractoriness Under Load, ℃1700170016501560
Permanent Linear Change, %1650℃*2h

Other 6 Types of Composite Magnesia Refractory Bricks

In addition to high-purity magnesia bricks, we also provide other composite types of magnesia bricks, including the following types. These bricks contain varying amounts of magnesium oxide.

Magnesia Iron Spinel Brick
Magnesia Iron Spinel Brick
Magnesium Aluminum Spinel Brick
Magnesium Aluminum Spinel Brick
Magnesia Zirconia Brick
Magnesia Zirconia Brick
Magnesia Carbon Brick
Magnesia Carbon Brick

Different Production Processes of High-quality Magnesia Bricks

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.

Different Types of Magnesia Bricks - Kerui

Magnesia Bricks Properties

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.

Kerui MgO Refractory Bricks for Partners
Kerui Magnesia Refractory Bricks in Factory

Due to its superior performance, magnesia bricks are widely used in various industries, including the steel industry, construction materials industry, glass industry, and non-ferrous metal industry.

Steel Industry:

  • Basic oxygen furnace, furnace lining, hearth, and walls;
  • Ironmaking furnace;
  • Mixer furnace;
  • Converter;
  • Ladle;
  • Electric arc furnace.

Construction Materials Industry

  • High-temperature tunnel kiln;
  • Lime kiln;
  • Calcination kiln;
  • Rotary kiln for mud recycling;
  • Heating furnace.

Non-Ferrous Metal Industry

  • Industrial furnaces;
  • Copper, lead, nickel, zinc, tin smelting furnaces;
  • Non-ferrous metal kilns.

Glass Industry

  • Glass regenerative furnace;
  • Heat exchanger;
  • Glass kiln;
  • Glass tank grid.

Competitive Factory Magnesite Bricks Price

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. Kerui 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:

  • Application scenario
  • Kiln size and operating temperature
  • Type and requirements of magnesia bricks
  • Project timeline
  • Construction requirements

KERUI Magnesia Bricks for Many Advantages
Shipment of Magnesite Bricks

Choose Kerui Refractory as Magnesia Brick Manufacturer

Kerui 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.

Company Strength

  • With over 30 patented technologies, certificates, and company honors, we ensure the quality and quantity of magnesia brick production while continuously upgrading our processes.
  • We have 20 pressure equipment units and 2 sets of 168-meter tunnel kilns to guarantee the production volume and quality of magnesia bricks.
  • Our team of over 100 factory professionals conducts rigorous inspections, packaging, and shipping of magnesia bricks.

Comprehensive Services

  • We offer customized magnesia brick services.
  • Based on the requirements of the kiln, we can provide customers with design drawings and recommendations for refractory materials.
  • Our professional construction team is available on-site to assist customers with the construction and trial operation of magnesia bricks.
Kerui Certificates 2024
Kerui Has Various International Certificates

Contact Kerui Refractory to Get Your Magnesia Bricks Now!

Kerui magnesia refractory bricks boast high quality and large output because of our automated and precise production line. We also provide detailed solutions tailored to meet customer requirements. Join us to experience the quality and reliability of Kerui magnesia bricks and services, and witness the difference in performance and durability.