High alumina refractory bricks are widely used in the steel industry, mainly in the following aspects:

I. Blast furnace

Blast furnace is one of the core equipment in iron and steel production, and its lining needs to withstand extremely high temperature and chemical erosion. High alumina refractory bricks are widely used in the shaft, belly and bottom of blast furnace because of their excellent refractoriness, corrosion resistance and thermal shock resistance. The refractoriness of high alumina brick is usually above 1750°C, which can effectively resist the erosion of high temperature slag.

II. Hot blast stove

Hot blast stove is used to provide high-temperature hot air for blast furnace, and its working temperature is extremely high and the temperature fluctuates frequently. The thermal shock resistance and high temperature stability of high alumina refractory brick make it an ideal material for lining of hot blast stove. In addition, the low porosity and high density of high alumina bricks can effectively reduce heat loss and improve the energy efficiency of hot blast stoves.

III. Converter and electric furnace

Converter and electric furnace are key equipment in steelmaking process, and their lining needs to withstand the corrosion of high temperature slag and molten steel. High alumina refractory bricks have good slag resistance and wear resistance, which can effectively protect the furnace lining and prolong the service life of equipment. Phosphate bonded high alumina bricks are also widely used in the top of electric furnace.

IV. Ladle and tundish

Ladles and tundish are used to contain and transport high-temperature molten steel, and their lining materials need to have good fire resistance and corrosion resistance. High alumina refractory bricks can withstand the high temperature and chemical erosion of molten steel, ensuring the safe use of ladle and tundish.

V. Heating furnace

The heating furnace is used to heat the billet to a temperature suitable for rolling, and the temperature in the furnace is usually above 1200 C. High-alumina refractory bricks are an ideal choice for heating furnace lining because of their high temperature resistance and good thermal insulation performance.

VI. Other applications

High-alumina refractory bricks are also widely used in other high-temperature equipment in the steel industry, such as sintering furnaces and lime kilns. In these equipments, high alumina brick can effectively resist high temperature and chemical erosion, and ensure the stable operation of the equipment.

VII. Summary

High alumina refractory bricks play an important role in blast furnace, hot blast stove, converter, electric furnace, ladle, tundish and heating furnace in iron and steel industry because of their high refractoriness, corrosion resistance, thermal shock resistance and good thermal insulation performance. Its excellent performance not only prolongs the service life of the equipment, but also improves the production efficiency and energy utilization.