High alumina refractory bricks are widely used in cement industry, especially in cement rotary kiln. The following is its specific application:

I. Sintering zone of cement rotary kiln

The burning zone is the area with the highest temperature and the most serious chemical erosion in the cement rotary kiln, and the working temperature is usually between 1400℃ and 1600℃. High alumina refractory brick can effectively resist acid-base chemical slag in cement clinker because of its high refractoriness (up to 1750℃) and good chemical corrosion resistance. In addition, the thermal shock resistance and spalling resistance of high alumina brick make it stable in the high temperature environment of firing zone.

II. Transition zone

The temperature of transition zone is lower than that of firing zone, but it still needs to bear higher temperature and chemical erosion. High-alumina refractory bricks are widely used in this area, especially in the parts where the kiln skin is unstable or bricks are often exposed. For example, phosphate bonded high alumina brick is widely used in transition zone because of its good corrosion resistance and spalling resistance.

III. Decomposition zones

Decomposition zone is a low temperature area in cement rotary kiln, but it still needs refractories with good chemical corrosion resistance and wear resistance. High alumina refractory bricks perform well at the hot end of the decomposition zone (such as the area where sulfur, alkali, salt and some clinker melts are produced). In addition, anti-spalling high-alumina bricks are also used in other parts of the decomposition zone.

IV. Kiln door cover and cooler

The kiln door cover and cooler are important parts of cement rotary kiln. These areas need refractory materials with good thermal shock resistance and chemical erosion resistance. High alumina refractory bricks can effectively protect these parts from high temperature and chemical erosion because of their excellent properties.

V. Other high-temperature equipment

In addition to cement rotary kiln, high-alumina refractory bricks are also widely used in other high-temperature equipment in cement plants, such as preheater and calciner. The working temperature and chemical environment of these equipments are complex, and high alumina refractory bricks can provide reliable protection.

VI. Summary

High alumina refractory bricks play an important role in cement industry because of their high refractoriness, chemical corrosion resistance, thermal shock resistance and spalling resistance. Its application in the firing zone, transition zone, decomposition zone, kiln door cover and cooler of cement rotary kiln can effectively improve the service life and operation efficiency of the equipment.