Wear-Resistant Ceramic High-Temperature Alumina ceramic-Lined Coal/Slurry Pipes are composite pipes specifically designed for conveying abrasive media such as coal slurry and slurry. They offer excellent wear resistance, corrosion resistance, and high-temperature resistance. The following is a detailed description:

Structure and Principle

· Structural Composition: Typically constructed of three layers, from the inside out, these are an Alumina ceramic lining layer, a transition layer, and a steel pipe layer. The ceramic layer is typically corundum (Al₂O₃), offering high hardness and wear resistance. The transition layer strengthens the bond between the ceramic and metal, overcoming the differences in thermal expansion coefficients. The outer steel pipe layer provides strength and toughness, ensuring overall structural stability.

· Operating Principle: By combining a high-hardness, wear-resistant alumina Ceramic Lining with a steel pipe, the ceramic layer utilizes its resistance to erosion and wear from media such as coal slurry and slurry, as well as its corrosion and high-temperature resistance, protecting the steel pipe from wear and corrosion, thereby extending the pipeline's service life and ensuring safe and smooth conveyance of the media. Performance Advantages

· High Wear Resistance: The alumina ceramic lining has a Mohs hardness of up to 9.0, making it over 20 times more wear-resistant than carbon steel pipe. It effectively resists erosion and wear from solid particles in coal slurries and ash slurries, significantly reducing pipe wear and extending replacement cycles.

· Corrosion Resistance: Alumina ceramics offer excellent chemical stability. The lining ceramics and inorganic binder resist corrosion from acids, alkalis, and other chemicals, making them suitable for conveying various corrosive media such as coal slurries and ash slurries.

· High-Temperature Resistance: It can operate for extended periods within a temperature range of -50°C to 900°C, meeting the high-temperature conditions encountered during coal slurry and ash slurry transportation. For example, it can be used to convey high-temperature ash in the thermal power industry.

· Anti-scaling: The ceramic layer has a smooth surface with low roughness, making it less susceptible to adhesion and exhibiting excellent anti-scaling properties. This ensures smooth flow of media within the pipeline, minimizing pipe blockage and reduced efficiency caused by scaling. ·Easy Installation: The pipe is relatively lightweight, approximately one-third lighter than ordinary pipes, and boasts excellent weldability. Installation methods include welding and flange connections, making it easy to install and effectively reducing installation costs and complexity.

Manufacturing Process

·Self-Propagating High-Temperature Clutch Synthesis Method: This method involves a chemical reaction between aluminum powder and oxygen at high temperatures to produce alumina ceramic, which forms a strong bond with the steel pipe. The resulting composite pipe consists of three layers, from the inside out: corundum ceramic, a transition layer, and steel. This process produces a dense ceramic layer with a high-strength bond to the steel pipe.

·Packing Method: Specialized alumina ceramic patches, made from Al₂O₃ and sintered at high temperatures, are bonded to the inner wall of the pipe using a high-temperature-resistant inorganic adhesive. After heating and curing, they form a strong, wear-resistant layer. This method is relatively simple to manufacture, but the bond between the ceramic patch and the pipe may not be as strong as that achieved with the self-propagating high-temperature clutch synthesis method.

Applications

It is primarily used in the power, mining, steel, and cement industries. In the power industry, it can be used to transport coal powder, ash, desulfurization slurry, etc.; in the mining industry, it can be used to transport tailings slurry, mineral powder, etc.; in the steel industry, it can be used to transport blast furnace coal injection, water-quenched slag, etc.; in the cement industry, it can be used to transport raw materials, clinker, coal powder, etc.

Key attributes