Alumina refractory brick for blast furnaces

Alumina refractory brick for blast furnaces is a refractory product made primarily from high-alumina bauxite clinker and has an Al₂O₃ content greater than 48%. They are primarily used for the lower masonry of blast furnaces. These bricks offer high-temperature and corrosion resistance, with a refractory temperature range of 1580-1770°C and a refractoriness under load temperature of 1740-1770°C. The production process requires well-calcined bauxite with an iron oxide content below 1.2%. These bricks are formed using high-tonnage brick presses and fired at a temperature of no less than 1500°C. The standard brick size is 230*114*65mm, and its compressive strength and thermal shock resistance meet the requirements of blast furnace operating conditions.

Blast furnace introduction

The blast furnace is one of the most core smelting equipment in steel production. Its furnace body is exposed to complex working conditions such as high temperature, coroziunea chimică, and mechanical impact for a long time, which places very strict requirements on the performance of refractory materials. High-alumina bricks are widely used in various parts of blast furnaces due to their excellent high-temperature resistance and good structural stability.

The main application areas of high alumina bricks for blast furnaces

Bosh and belly areas: These areas withstand the erosion of slag and charge, as well as high-temperature corrosion. Cărămizi cu conținut ridicat de alumină effectively extend their service life.

Heat transition zone: These areas offer strong resistance to molten iron and slag corrosion, ensuring long-term, stable operation of the blast furnace.

Around the taphole: These areas require high wear resistance and thermal shock resistance. High-alumina bricks are suitable for the frequent operating conditions in this area.

Advantages of alumina refractory brick for blast furnaces

• Improve the safety and stability of blast furnace operations.
• Extend the service life of the furnace lining and reduce maintenance costs.
• Reduce energy consumption during the blast furnace smelting process and improve economic efficiency.