Wear-resistant alumina ceramic liner tubes are a critical protective component widely used in industrial pipeline systems subject to severe abrasion. Their primary composition is alpha-alumina (Al₂O₃), with content typically ranging from 92% to 99.5%. This material is manufactured through a high-temperature sintering process, resulting in exceptional hardness, with a Rockwell hardness (HRA) of ≥85 and a Mohs hardness rating of 9, second only to diamond. These liner tubes are securely bonded or mechanically embedded onto the inner wall of metal pipes, forming a robust protective barrier that effectively isolates the flowing medium from direct scouring and wear on the metal pipe body.
Their superior performance stems from the inherent properties of alumina ceramics. In addition to high hardness, their density is typically >3.6 g/cm³, with compressive strength exceeding 850 MPa. The wear resistance of these ceramic liners is approximately 266 times that of manganese steel and 171.5 times that of high-chromium cast iron, extending equipment service life by 5 to 10 times under comparable operating conditions. Their smooth surface and low coefficient of friction effectively reduce conveying resistance. They also possess excellent corrosion resistance, withstanding most chemical media except hydrofluoric acid and hot concentrated alkalis.
This product is primarily applied in industrial sectors with stringent demands for wear resistance. Typical applications include coal conveying, pulverized fuel feeding, and ash removal systems in thermal power plants; pulverized coal and ore powder transportation pipelines in steel mills; raw meal, clinker, and coal powder transfer lines in cement plants; and tailings and concentrate slurry transportation systems in mining operations. It is also widely used in pneumatic and hydraulic conveying pipelines in metallurgical, chemical, and other industries, effectively addressing issues of rapid pipeline wear, perforation, and leakage caused by long-term material scouring.
In summary, wear-resistant alumina ceramic liner tubes provide long-term protection for industrial conveying pipelines through their ultra-high hardness, exceptional wear, and corrosion resistance. They significantly reduce the frequency of shutdowns for maintenance and replacement costs caused by pipeline wear, enhancing the continuous operational efficiency and safety of production systems. They represent a proven, cost-effective protective solution.
Post time: Dec-24-2025