The wear-resistant alumina ceramic rubber liner is a composite material widely used in the field of industrial wear protection. It effectively extends the service life of equipment under harsh conditions by combining the high wear resistance of alumina ceramic with the cushioning properties of rubber. This liner uses alumina as the main raw material, with the addition of ceramic powder and silicon oxide, sintered at high temperatures around 1700°C. Its alumina content is generally no less than 95%, density reaches 3.5-3.9 g/cm³, and Rockwell hardness is as high as HRA85-90, ensuring excellent wear resistance. In practical applications, this liner exhibits a multi-layer composite structure: the upper layer is alumina ceramic, the middle is a rubber layer, and the bottom is a support steel plate. These three layers are firmly bonded through a vulcanization process, forming a unified wear protection system.
The outstanding performance of this composite liner is reflected in multiple aspects: Firstly, its wear resistance is excellent, with the hardness of alumina corundum ceramic reaching above HRA85, and wear resistance being more than 200 times that of ordinary carbon steel. Secondly, the product has good impact resistance. Through toughened ceramic formula and unique spherical design, combined with the rubber buffer layer, it can effectively resist the impact of large materials. Thirdly, the liner has good heat resistance and can operate stably within a temperature range of 0°C to 250°C for extended periods. Additionally, the rubber layer uses a special formula with acid and alkali resistance, able to withstand corrosion in weak acid and weak alkaline environments. Regarding physical properties, the liner’s compressive strength is ≥850 MPa, fracture toughness KΙC ≥4.8 MPa·m1/2, the bonding force between rubber and ceramic (shear stress) ≥3.0 MPa, and the rubber aging life is ≥15 years, ensuring long-term reliability of the product.
Wear-resistant alumina ceramic rubber liners are widely used in industrial fields, mainly including firepower coal conveying systems, steel plant hoppers, mine chutes, coal washing equipment, cement plant conveying systems, and other severely worn environments. In practical applications, the liners are generally divided into different types such as bonded, welded, and rubber composite, including various specifications like solid rectangular, with round holes, and trapezoidal pipes. They can be cut and bent according to the shape of the equipment, meeting the installation needs for special-shaped equipment. The modular design facilitates easier installation and replacement, significantly reducing equipment maintenance time and costs. In the 4.5 million ton green intelligent mining and processing technological transformation project of Dundee Mining, the grinding bin adopted high-standard ceramic liners with K95 fine alumina content ≥95% and density ≥3.8 g/cm³, demonstrating its reliability in large-scale industrial projects.
Post time: Nov-20-2025