Uses of Refractory Bricks

Refractory bricks are a type of material that can withstand high temperatures. They have a high melting point and are used for high-temperature contact surfaces, backs, or insulation layers. This material maintains a stable structure in harsh, high-temperature, and high-mechanical stress environments. Additionally, it provides a longer lifespan to high-temperature application equipment.

If regular bricks are used at high temperatures, they may crack and undergo other stability-compromising reactions. Therefore, using high-quality refractory bricks at high temperatures can extend the lifespan of high-temperature equipment.

Characteristics Of Refractory Bricks

Due to different compositions, refractory bricks have different characteristics. Only by understanding the characteristics of these refractory bricks can you use refractory bricks better.

High Refractoriness

The alumina, magnesium oxide and zircon have high melting points.  Their refractorinesses are 1700 degrees Celsius, 1800 degrees Celsius and 2500 degrees Celsius. The higher the content of these materials is in refractory bricks, the higher the refractoriness is.

Hot bricks: Alumina bricks, magnesium bricks, etc.

Strong Thermal Shock Resistance

The smaller the mineral expansion coefficient, the higher the thermal shock resistance of refractory bricks. The expansion coefficients of zircon and alumina are 5.1×10^(-6)/℃ and 8.6×10^(-7)/℃ respectively under 1500℃. So, the brick made from these two high-purity materials has good strong thermal shock resistance.

Hot bricks: Zircon bricks, alumina bricks, magnesium bricks, etc.

Corrosion Resistance

Different minerals have different resistance effects on acidic and alkaline chemical substances. Silicon dioxide has good resistance to acidic chemical erosion. Magnesia and bauxite can resist alkaline chemical erosion. These bricks are used in different high-temperature chemical environments.

Hot bricks: High alumina bricks (neutral), magnesia bricks (alkaline), silica bricks (acidic)), etc.


The color of refractory bricks is related to their composition. They typically come in beige, brown, white, brown, purple, gray, etc.

Hot bricks: Mullite refractory bricks (white), magnesia carbon bricks (black), etc.

Refractory Brick Uses

These refractory bricks exhibit excellent performance at high temperatures. Many industries require a large number of refractory bricks to resist the erosion caused by high temperatures, such as the steel industry, aluminum industry, non-ferrous metal industry, glass industry, cement industry, ceramic industry, petrochemical industry, foundry industry, energy industry, lime industry, and so on. They are mainly used in the following areas:

  • High-temperature furnace linings: steelmaking furnaces, blast furnaces, converters, heat storage chambers, boilers, combustion chambers, and other high-temperature industrial furnaces.
  • Chimneys and flues: chimneys and flues of high-temperature equipment, etc.
  • Other high-temperature equipment: fireboxes, ovens, fireplaces, etc.

In the industrial and manufacturing sectors, refractory bricks are crucial. They not only safeguard high-temperature production but also extend the lifespan of high-temperature equipment. Kerui Refractory is a highly reputable manufacturer of refractory bricks. We provide high-quality refractory bricks and offer high-temperature resistant material solutions for every partner. Contact us to get the details.