Kiln Bricks for High-Temperature Kilns up to 1800°C

For high-temperature kilns with a maximum temperature of 1800°C, selecting suitable refractory bricks is crucial to ensuring stable kiln operation.

1. Types of kiln bricks suitable for applications at 1800°C

Different kiln zones require different refractory material compositions. For ultra-high temperature environments, the following types of kiln bricks are commonly used.

(1) High-alumina bricks (Al₂O₃ content 70–90%)

High-alumina refractory bricks have high refractoriness and good resistance to slag erosion. They are widely used in the transition zone and high-temperature furnace lining of cement rotary kilns.

(2) Mullai stone bricks

Mullite refractory bricks exhibit excellent thermal shock resistance and a low coefficient of thermal expansion. They are ideal for applications involving frequent heating and cooling cycles, such as tunnel kilns and ceramic kilns.

(3) Corundum refractory bricks (≥90% Al₂O₃)

Corundum refractory bricks can withstand temperatures approaching 1800℃.This type of brick has extremely high strength, excellent wear resistance, and good chemical stability. These features make it suitable for use in steelmaking furnaces and high-temperature combustion zones.

(4) Refractory magnesia bricks

Magnesium oxide kiln bricks are commonly used in alkaline environments such as cement kilns and steelmaking converters. They have strong resistance to alkali and alkaline slag erosion.

2. Key performance requirements for high-temperature kiln bricks

In order to operate reliably at temperatures up to 1800°C, the kiln bricks must meet stringent technical standards.For example:

① High load-bearing fire resistance;

②Low apparent porosity;

③ High cold-pressing strength;

④ Strong resistance to thermal shock;

⑤ It has good chemical stability against alkalis, slag and dust.

High-quality refractory kiln bricks help reduce spalling, cracking, and premature lining failure.

3. Application of fire bricks in industrial kilns

In general,high-quality refractory bricks are widely used in:

① Cement rotary kiln (combustion zone and transition zone);

②Steelmaking furnace and ladle;

③ Ceramic roller kilns and tunnel kilns;

④ Vertical lime kiln;

⑤ Glass melting furnace.

Each application requires a customized refractory solution based on temperature distribution and chemical conditions.

At the same time, a variety of complex factors need to be considered when selecting kiln bricks.

●Maximum operating temperature；

●Chemical atmosphere；

●Mechanical stress and wear；

●Thermal cycling frequency；

●Brick size and installation method。

Besides,these are all factors that need to be considered.

In addition, collaborating with experienced refractory manufacturers ensures the selection of suitable materials and guarantees the long-term performance of the kiln.

Henan Ruitai Lianxin Refractory Materials Co., Ltd. not only provides customers with high-quality refractory bricks that meet quality standards, but also offers the most suitable kiln operating conditions solutions. Please feel free to contact us if you have any needs.

Choosing Ruitai Lianxin is choosing strength.