In the high – temperature environments of modern industry, anchor bricks, an unassuming yet crucial material, play a significant role. They are like silent guardians, ensuring the stable operation of various high – temperature equipment.
Anchor bricks are shaped refractory bricks used for stabilization. Under harsh conditions such as high temperature, high pressure, and severe vibration, they are responsible for fixing and strengthening. Their unique structure and properties make them an indispensable key material in numerous industrial fields. In terms of materials, there are diverse types of anchor bricks. Common ones include clay – based anchor bricks, mainly made of aluminosilicate materials. With relatively low aluminum content and fire resistance, they are suitable for medium – temperature kilns or auxiliary areas. High – alumina anchor bricks, with an aluminum content of ≥ 48%, stand out for their better fire resistance and compressive strength compared to clay bricks. They play a vital role in high – temperature areas, like the pre – heater or cooler sections of cement rotary kilns. Silica – based anchor bricks, with silica as the main component, have high fire resistance and excellent resistance to acidic atmosphere corrosion, performing remarkably well in environments such as glass kilns with high temperature and acidic atmosphere.
Anchor bricks are widely applied in various industries. In the casting industry, they provide stable support for the casting of high – temperature alloys such as aluminum alloys, stainless steels, nickel – based alloys, and titanium alloys. The metallurgical industry heavily relies on them for lining and fixing high – temperature equipment like continuous casting machine crystallizers, steel – making electric arc furnaces, converters, hot blast stoves, blast furnaces, and desulfurization tanks. They are also used in the cement industry for equipment like rotary kilns, coolers, and pre – heaters, in the petrochemical industry for pipelines and storage tanks in refineries, and in the power industry for fixing and strengthening equipment such as boilers, furnaces, and tails in coal – fired and gas – fired power stations. In high – temperature kilns, anchor bricks are of particular importance. They not only fix the lining materials like refractory castables or refractory fiber modules to prevent displacement or collapse under high temperature and mechanical stress, ensuring the stability and durability of the kiln structure, but also connect the lining materials with the kiln steel shell through mechanical means, greatly enhancing the overall strength of the kiln and reducing the risk of cracking and spalling of the lining layer.
With the continuous advancement of industrial technology, the performance requirements for anchor bricks are increasing. Companies and research institutions are investing more in R & D to develop anchor bricks with better performance and stronger applicability. Anchor bricks, though small, play an irreplaceable role in the industrial high – temperature field. From traditional industries to emerging industries, they are everywhere. In the future, with continuous technological innovation and the expansion of application fields, anchor bricks will surely write a more glorious chapter in the journey of industrial development, providing a solid guarantee for the efficient and stable operation of various industries.
