Alumina ceramic-lined pipe is a composite pipe that combines alumina ceramic with metal pipe. It boasts excellent wear and corrosion resistance and is widely used in industrial applications. The following is a detailed introduction:

Structure and Composition

Generally, from the inside out, it consists of three layers: corundum ceramic, a transition layer, and steel. The ceramic layer is dense corundum (Al₂O₃), forming a strong bond with the steel pipe through the transition layer. This leverages the steel pipe's high strength and toughness with the corundum ceramic's high hardness, wear resistance, corrosion resistance, and heat resistance.

Performance

High Wear Resistance: The Alumina ceramic lining has a Mohs hardness of up to 9.0, offering high resistance to abrasive media used in industries such as metallurgy and power generation. Industrial operation has proven that its wear life is ten or even dozens of times longer than that of hardened steel.

Corrosion Resistance: Ceramic is a neutral material with stable chemical properties. It is resistant to various inorganic and organic acids, as well as organic solvents. Its corrosion resistance is over ten times that of stainless steel. High-Temperature and Thermal Shock Resistance: It can operate long-term within a temperature range of -50°C to 900°C. Its linear expansion coefficient is approximately half that of steel pipe, offering excellent thermal stability and withstanding certain temperature fluctuations without cracking.

Low Operating Resistance: The inner surface is smooth and rust-resistant, surpassing any other metal pipe in smoothness. Its clear water resistance coefficient is 0.0193, slightly lower than that of seamless pipe, reducing operating costs.

Easy Installation: Relatively lightweight and offering excellent weldability, it can be installed using welding or flange connections, making installation easy and effectively reducing installation costs and difficulty.

Manufacturing Process: Self-Propagating High-Temperature Clutch Synthesis Method: A seamless steel pipe is placed in a centrifuge die. A mixture of red iron and aluminum powder (thermite) is added. When the die rotates at a certain speed, the thermite ignites, triggering a violent chemical reaction that produces alumina ceramic and iron. Under the influence of centrifugal force, the alumina ceramic is distributed throughout the inner layer, forming a composite pipe Composed of three layers: corundum ceramic, transition layer, and steel. The patch method uses a high-temperature, strong adhesive to adhere alumina ceramic sheets to the inner wall of the pipe. After heating and curing, they form a durable, wear-resistant layer. This method is relatively simple to manufacture, has a short production cycle, and is relatively low-cost.

The integral molding method uses a pipe fitting that is fired as a whole and then cast inside a steel pipe using a special filler. This pipe has a smooth inner wall, excellent sealing properties, and excellent wear and corrosion resistance, but the production cycle is long and the cost is high.

Application Areas

This pipe is widely used in the power, metallurgy, mining, coal, and chemical industries for conveying abrasive granular materials such as sand, stone, coal powder, ash, and molten aluminum, as well as corrosive media. It is an ideal wear- and corrosion-resistant pipe.

Key attributes