The application of high alumina brick in steelmaking furnace is mainly reflected in the following aspects:

I. Furnace top and upper part of furnace body

High alumina brick is often used in the top and upper part of steelmaking furnace because of its good thermal shock resistance and high refractoriness. Although the temperature in these parts is high, they are relatively stable, and high-alumina bricks can effectively resist high temperature and chemical erosion. For example, high-alumina bricks are widely used in the top of electric arc furnaces and converters.

II. Furnace wall

In the furnace wall of steelmaking furnace, high alumina brick can withstand high temperature and chemical erosion, and its low creep performance ensures that the furnace wall remains stable in long-term high temperature environment. Especially for some furnaces that need to be started and stopped frequently, the thermal shock resistance of high-alumina bricks can effectively reduce the damage caused by temperature changes.

III. Furnace bottom

The application of high alumina brick in furnace bottom mainly depends on its wear resistance and erosion resistance. The bottom of steelmaking furnace needs to withstand the erosion and erosion of high-temperature molten metal, and the high density and low porosity of high-alumina brick make it able to effectively resist these effects.

IV. Taphole and runner

The tapping hole and runner of steelmaking furnace are the key parts of high-temperature molten metal flow, and these parts need refractories with good corrosion resistance and wear resistance. High alumina brick can effectively resist the erosion of high temperature molten metal and reduce erosion and wear.

V. Other parts

In some auxiliary parts of steelmaking furnace, such as flue and preheater, high alumina brick is also widely used because of its good fire resistance and corrosion resistance.

VI. Performance advantages

High fire resistance: The fire resistance of high-alumina brick is usually between 1710°C and 1850°C, which can meet the high temperature demand of steelmaking furnace.

Thermal shock resistance: high-alumina brick can withstand the rapid change of temperature and reduce the damage caused by thermal shock.

Corrosion resistance: high alumina brick has good corrosion resistance to acidic and alkaline slag, and is suitable for the complex chemical environment of steelmaking furnace.

Low creep rate: in high temperature environment, the creep rate of high-alumina brick is low, which can keep the structure stable.

In a word, high-alumina brick has been widely used in many key parts of steelmaking furnace by virtue of its excellent performance, which provides an important guarantee for efficient operation and long life of steelmaking furnace.