What are the refractory bricks commonly used in ladles?

A ladle is a device used to contain molten steel in the steelmaking process, and various types of refractory bricks are often used to construct its lining. The following is a detailed introduction of refractory bricks commonly used in ladles and their characteristics:

1. Alumina carbon brick (Al2O3-C):

Alumina carbon bricks are composed of alumina and carbon materials, which have high fire resistance and slag resistance.

It has good corrosion resistance and can resist the erosion of molten steel, ladle slag and high alkalinity slag.

It has good thermal conductivity and mechanical strength, and is suitable for masonry in high-temperature areas such as the bottom and side walls of ladles.

2. High alumina brick (Al2O3):

High alumina bricks are made of high-purity alumina as the main component, which has excellent high temperature resistance and fire resistance.

It has good slag resistance and can resist the erosion of molten steel and smelting slag on the inner lining.

It is suitable for areas with high temperature in the ladle, such as the bottom of the ladle, the corner of the ladle and the upper wall.

3. Carbon brick (C):

Carbon bricks are made of high-purity graphite material, which has excellent high temperature resistance and thermal conductivity.

It has good corrosion resistance and can resist the erosion of molten steel and slag on the inner lining.

It is often used for masonry in high temperature areas such as the bottom of the ladle and the head of the cast steel ladle.

4. Silicate brick (SiO2):

Silicate bricks are made of clay and siliceous raw materials and have good fire resistance and thermal shock properties.

It has good corrosion resistance and can resist the erosion of molten steel and smelting slag on the inner lining.

It is often used in areas with lower temperature in ladles, such as furnace doors and observation holes.

The selection of these types of refractory bricks depends on the working conditions and requirements of different parts inside the ladle. Usually, multiple types of refractory bricks are combined inside the ladle to meet the requirements of different areas. In addition, the quality and installation technology of refractory bricks are also key factors to ensure the normal operation of the ladle and prolong its service life.