2024-06-19 13:44:07
Among numerous refractory materials, corundum refractory bricks have become an indispensable part of industrial furnaces and kilns due to their special performance and wide application areas. Corundum bricks, a refractory material product with an alumina content of over 90%, have won widespread recognition in the market for their high hardness, strength, chemical stability, and excellent thermal shock stability.
The room temperature compressive strength of corundum refractory bricks is very high, which allows them to maintain a stable form even in high temperature and pressure environments, effectively resisting external pressure. In addition, the starting temperature of load softening is greater than 1700 ℃, which means that at very high temperatures, corundum bricks can still maintain their original hardness and strength, and are not prone to deformation or softening.
Secondly, the chemical stability of corundum bricks is also excellent, with strong resistance to acidic or alkaline slag, metals, and glass liquids. This characteristic allows corundum bricks to maintain their original properties in high-temperature environments, even when in contact with various chemicals, without being eroded or damaged.
However, the thermal shock stability of corundum bricks is related to their organizational structure. Dense products have good corrosion resistance, but their thermal shock stability is relatively poor. This means that in environments with rapid temperature changes, corundum bricks may crack or break due to thermal expansion and contraction. Therefore, when designing and using corundum bricks, it is necessary to fully consider their working environment and temperature changes to avoid damage caused by thermal shock.
There are various types of corundum bricks, mainly divided into sintered corundum bricks and electric fused corundum bricks. They can be selected based on specific usage environments and needs. For example, sintered alumina bricks can be made by using sintered alumina and fused alumina as raw materials, or by combining alumina clinker with sintered alumina with high alumina/silica ratio, and making them through sintering method. This type of corundum brick has excellent characteristics such as high strength, high stability, corrosion resistance, and thermal shock resistance, and is widely used in high-temperature and high-pressure process equipment.
In terms of application, corundum refractory bricks are widely used in blast furnaces, hot blast furnaces, refining furnaces outside steelmaking furnaces, sliding water heaters, glass furnaces, and petrochemical industry furnaces. They are not only used as lining materials for furnaces, but also for making refractory products of various shapes, such as bricks, boards, pipes, and shaped parts. These corundum refractory products, with their superior performance, ensure the stable operation and efficient production of the furnace.
In addition, with the advancement of technology and technological innovation, the performance of corundum refractory bricks is also constantly improving. For example, by adding specific chemical components, the fire resistance, strength, and thermal shock stability of corundum bricks can be further improved. These improvements enable corundum bricks to better adapt to various complex and harsh working environments.
Overall, corundum refractory bricks have become an indispensable part of high-temperature processes due to their superior performance and wide range of applications. With the progress of technology and the continuous improvement of processes, we have reason to believe that corundum refractory bricks will play a greater role in the future, providing solid guarantees for the stable operation and efficient production of industrial furnaces.
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