Alumina ceramic-lined pipe is a high-performance composite material made of alumina ceramic and metal tubes. It is primarily used to enhance pipe performance, including wear resistance, corrosion resistance, and high-temperature resistance. The following is a detailed description:

Structure and Composition

Ceramic Lining: Typically made of high-purity alumina (such as 92%, 95%, or 99%), this layer is formed through sintering and other processes to create a hard, wear-resistant ceramic layer. This is a key component in achieving high pipe performance.

Metal Base: Typically made of carbon steel (such as Q235) or stainless steel, it provides strength and toughness, supporting the ceramic lining and enabling the pipe to withstand certain pressures and mechanical loads.

Transition Layer (select products): Formed between the ceramic and metal layers through processes such as self-propagating high-temperature synthesis, this transition layer strengthens the bond between the ceramic and metal layers and alleviates stress issues caused by the difference in thermal expansion coefficients.

Performance Characteristics

High Wear Resistance: The Alumina ceramic lining boasts a Mohs hardness of up to 9.0, offering excellent wear resistance, ten or even dozens of times that of hardened steel. It effectively resists erosion and wear from materials, extending pipe service life. 

Corrosion Resistance: Excellent resistance to most corrosive media, including acids and alkalis, and resistant to fluorine- and chlorine-based gases, making it suitable for corrosive environments such as chemical processing.

High Temperature Resistance: Withstands temperatures exceeding 1600°C, maintains stable performance under high-temperature conditions, and is not susceptible to deformation or oxidation.

Low Friction Resistance: The ceramic lining has a smooth surface with a roughness superior to that of metal pipes, and a drag coefficient of approximately 0.0193, reducing friction and drag during material transportation and lowering energy consumption.

Excellent Mechanical Properties: Combining the high hardness of ceramic with the high toughness of metal, it offers excellent impact resistance and compressive strength, and can withstand certain external forces.

Production Process

Raw Material Preparation: Select ceramic materials such as alumina powder of appropriate purity, and metal pipes as the base material. Ceramic Layer Preparation: Alumina powder is mixed with a directing agent, diluent, and other materials to form a coating material. This is then evenly applied to the inner surface of the metal pipe by brushing, spraying, or dipping. The coating then undergoes drying, curing, and high-temperature sintering to bond the ceramic material to the metal substrate, forming a dense lining.

Quality Inspection: Finished products undergo visual inspection, dimensional inspection, and strength testing to ensure they meet quality standards.

Applications:

Power Industry: Used in coal and slag conveying pipelines, as well as pipelines for conveying fly ash, limestone slurry, and other materials, to resist wear and corrosion.

Metallurgical Industry: Suitable for gas conveying pipelines for blast furnaces and converters, as well as for conveying materials such as slurry and iron powder, ensuring stable operation in high-temperature, high-wear environments.

Mining Industry: Suitable for pipeline systems used in mine backfill, concentrate powder, and tailings transportation, extending pipe wear life and reducing maintenance costs.

Chemical Industry: Used for conveying corrosive materials containing solid particles and high-temperature corrosive gases, such as sulfuric acid and hydrochloric acid.

Key attributes