Alumina ceramic-lined pipe is a composite pipe that combines an Alumina ceramic lining with a steel pipe. It boasts excellent wear and corrosion resistance and is widely used in industrial applications.

Structure and Composition

It generally consists of three layers: from the inner to the outer: a smooth Ceramic Lining, typically alumina ceramic, such as 92% alumina ceramic, which offers high hardness and wear resistance; a ceramic-metal transition layer in the middle, which strengthens the bond between the ceramic and metal; and an outer steel pipe, providing strength and toughness.

Performance

·High Wear Resistance: The alumina ceramic lining has a high hardness, reaching a Mohs hardness of 9.0. Its wear resistance is over 20 times higher than that of carbon steel pipe, effectively resisting erosion by particulate materials and abrasive media, extending the pipe's service life.

·Corrosion Resistance: Alumina ceramic exhibits excellent corrosion resistance, resisting attack by a variety of chemicals. It is suitable for conveying corrosive media, such as acid and alkali solutions, and protects steel pipes from corrosion. · High-temperature resistance: Able to withstand high temperatures, some Alumina ceramic-lined pipes can withstand temperatures exceeding 1600°C, meeting the requirements of high-temperature operating conditions. They are widely used in high-temperature transportation scenarios in industries such as metallurgy and power generation.

· Anti-scaling: The ceramic layer has a smooth surface that resists material adhesion, ensuring smooth material transportation and reducing pipeline blockage and reduced transportation efficiency caused by scaling.

· Easy installation: The pipes are relatively lightweight and have excellent weldability. They can be installed using welding or flange connections, making installation easy and effectively reducing installation costs and difficulty.

Manufacturing Process

Common manufacturing processes include the self-propagating high-temperature clutch synthesis method. This method involves chemically reacting aluminum powder with oxygen at high temperatures to produce alumina ceramic, which forms a strong bond with the steel pipe, creating a composite pipe composed of three layers: corundum ceramic, transition layer, and steel. Alternatively, there is the patch method, where alumina ceramic sheets are adhered to the pipe's inner wall using a high-temperature, strong adhesive. After heating and curing, they form a wear-resistant layer. Applications: Widely used in industries such as metallurgy, steel, coal, mining, thermal power, cement, and chemicals. For example, in the thermal power industry, they are used for pulverized coal conveying pipes and ash removal pipes; in the mining industry, they are used for tailings conveying pipes and cyclone feed pipes; and in the chemical industry, they are used for acid and alkali media conveying pipes and slurry circulation pipes. They effectively protect pipelines, improve production efficiency, and reduce maintenance costs.