In many high-temperature industrial fields, high alumina bricks have critical applications, and their excellent performance characteristics provide a solid guarantee for various production processes.
1. Steel and iron industry
In the process of iron and steel smelting, from blast furnace to steelmaking furnace and other processes are inseparable from high alumina bricks. The lining part of the blast furnace is made of high alumina bricks, which can effectively resist the strong erosion and scouring of high temperature hot metal and slag, maintain the stability of the internal structure of the blast furnace, and ensure the continuous and efficient reduction smelting process of iron ore. In the steelmaking process, whether it is a converter or an electric furnace, the lining constructed of high alumina bricks can withstand the impact of high temperature molten steel, slag and complex chemical reactions in the steelmaking process. Its good high temperature resistance enables the furnace to operate stably for a long time in a high temperature environment, laying the foundation for the precise control of the composition and temperature of molten steel and improving the quality of steel, helping to improve the efficiency of steel production and product quality, and reducing the production interruption and cost increase caused by the furnace lining damage.
2. Non-ferrous metal smelting industry
In the smelting and refining process of non-ferrous metals such as copper, aluminum, lead, zinc, etc., high alumina bricks also play an important role. In the copper smelting furnace, flash furnace and other equipment, high alumina bricks can withstand the erosion of high temperature copper melt and slag, maintain the stability of the high temperature environment inside the furnace, and promote the smelting and purification of copper concentrate. For aluminum electrolytic cell, high alumina brick can be used as the lining material to resist the corrosion of high temperature electrolyte and aluminum liquid, ensure the smooth electrolytic process, and improve the production efficiency and purity of aluminum. In the blast furnace and other kilns of lead and zinc smelting, high-alumina bricks, with their excellent chemical stability and high temperature resistance, effectively resist the erosion of lead and zinc melt and slag, maintain the stability of the reaction in the furnace, reduce the risk of metal loss and production accidents caused by furnace lining damage, and help the efficient and stable production of non-ferrous metal industry.
3. Cement industry
Cement rotary kiln is the core equipment of cement production, in which high alumina brick plays an indispensable role. In the rotary kiln, high alumina brick as the lining material, to face the cement raw material in the preheating, decomposition and clinker formation process of high temperature, alkaline substances and material mechanical wear. It not only has excellent high temperature resistance, can withstand high temperatures of up to 1400℃ without softening deformation, but also has good corrosion resistance to the alkaline components in the raw cement and clinker, which can effectively prevent the damage caused by chemical reaction between the lining material and the material. In addition, the high alumina brick can also adapt to the thermal expansion and cold contraction stress caused by temperature fluctuations during the rotation process of the rotary kiln, maintain the relative uniformity of the temperature field in the kiln, ensure the quality stability of the cement clinker, extend the service life of the rotary kiln, and thus improve the continuity of cement production, economy and reliability of product quality.
4. Ceramic industry
In the ceramic firing process, high alumina bricks are often used to build the lining of the kiln. Because the firing of ceramic products requires precise control of temperature and atmosphere, high alumina bricks can provide a stable high temperature environment, and its chemical inertness can avoid pollution to ceramic products, helping to produce high-quality, uniform color ceramic products. In the production process of the refractory industry itself, high alumina bricks, as a basic and important refractory material, are often used to manufacture other special refractory products in high-temperature firing equipment lining, providing the necessary high-temperature conditions for the research and development and production of refractory materials, promoting the technical innovation and product upgrading in the field of refractory materials, and promoting the coordinated development and progress of related industries.
