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Large diameter alumina ceramic sleeve pipeline Provide the ultimate solution for severe wear and corrosion conditions
Product Description
Large-diameter alumina ceramic sleeve pipeline is a high-performance pipeline designed specifically for use in extremely harsh industrial environments. Its core principle is to combine exceptional wear and corrosion resistance with the high flow capacity afforded by its large diameter. By tightly inlaying or bonding high-purity, high-hardness alumina ceramic to the inner wall of a steel pipe, this pipe combines the mechanical strength of metal with the extreme wear resistance of ceramic. It is an ideal alternative to traditional cast stone, alloy steel, and pure steel pipes, significantly reducing maintenance costs and extending service life.
Large-diameter ceramics are industrial wear-resistant and corrosion-resistant materials made from high-purity alumina through a specialized sintering process. They are designed for critical applications such as material handling and media handling in heavy industries like cement, steel, thermal power, ports, and chemicals. As a core material for addressing the challenges of wear and corrosion in industrial equipment, our large-diameter ceramics, after years of technological iteration and market validation, can accommodate conventional diameters of 300-600mm and thicknesses of 10-50mm, while also supporting custom specifications. They are widely used in numerous industrial scenarios worldwide, providing reliable support for companies to reduce operational costs and improve production efficiency.
Product Features
Superior Wear Resistance: Sintered from high-purity alumina, it achieves a Mohs hardness of 9, far exceeding that of ordinary metals. When subjected to long-term wear from highly abrasive materials such as coal, ore, and cement, its wear rate is only 1/20th of that of traditional steel, or even lower, significantly extending equipment life.
Excellent Corrosion Resistance: It exhibits exceptional chemical stability, withstanding corrosion from complex media such as acidic and alkaline solutions and high-temperature flue gases. This effectively prevents equipment leakage and damage in highly corrosive environments such as chemical, thermal power, and smelting.
High Strength and Toughness: With a compressive strength exceeding 300 MPa, it resists deformation and cracking in high-pressure, heavy-load industrial environments. It maintains structural integrity even after minor impacts, making it suitable for a wide range of harsh working conditions.
Product Advantages
Significant Cost Reduction and Efficiency Improvement: Thanks to its exceptional wear and corrosion resistance, equipment maintenance cycles are extended from 1-3 months for traditional materials to 12-18 months, increasing its service life by 3-5 times. This significantly reduces replacement frequency and maintenance costs, while also reducing downtime and improving production efficiency.
Wide Range of Applications: We offer customized solutions tailored to the needs of various industries, such as custom-made high-corrosion-resistant formulations for the chemical industry, covering virtually all heavy industrial sectors.
Advanced Production Equipment: We utilize fully automatic presses, high-temperature tunnel kilns, and precision cutting and grinding equipment to ensure precise ceramic sheet dimensions and stable performance.
Rigorous Process: From raw material mixing, dry pressing, high-temperature sintering, to precision machining, every step undergoes rigorous quality inspections.
Product Testing and Certification: All products undergo multiple performance tests, including hardness, density, and compressive strength, before leaving the factory. We are actively pursuing ISO9001 quality management system certification and can provide third-party test reports upon request.
Technical parameters
| Items |
Specifications |
| Content of alumina |
≥92% |
≥95% |
| Density |
≥3.6 g/cm3 |
>3.8g/cm3 |
| Rockwell A hardness |
≥82HRA |
≥85HRA |
| Impact strength |
≥1200 MPA |
≥1500 MPA |
| Fracture toughness |
≥3.8MPa·m1/2 |
≥4.0MPa·m1/2 |
| Vickers hardness |
≥1150HV10 |
≥1200HV10 |
| Bending Strength |
≥290MPa |
≥330MPa |
Applications
Large-diameter ceramic pipes are the lifeblood of material conveying systems in the following industries:
Thermal Power Industry: Pulverizing, ash handling, and slag removal systems in coal-fired power plants.
Steel and Iron Industry: Blast furnace coal injection, sintering dust, and steelmaking dust removal systems.
Ports and Terminals: Pneumatic or mechanical conveying of bulk materials (ore, coal, grain).
Chemical Industry: Conveying corrosive powders, granules, and slurries.
Mining and Coal Industry: Concentrate conveying, tailings disposal, coal washing, and pulverized coal conveying.
Cement Industry: Pneumatic conveying of raw meal, clinker, and cement powder.
Comparison of the advantages of alumina ceramic rings, welded alumina ceramic plate, and bonded alumina ceramic sheets
| Comparison Dimension |
Alumina Ceramic sleeves |
Welded Alumina Ceramic Plates |
Adhered Alumina Ceramic Sheets |
| Structural Adaptability |
Annular structure, specifically designed for rotation/sealing/axial fitting (e.g., mechanical seal dynamic/static rings, bearing sleeves). It fits tightly with shafts/housings and is naturally suitable for dynamic movement or sealing working conditions. |
Flat plate structure, requiring welding for fixation. Welding is extremely difficult (large melting point difference between ceramics and metals), and it cannot meet the needs of rotation or annular sealing. |
It can be spliced into an annular shape, but each sheet is small in size and requires multi-sheet splicing. Gaps or stress concentrations easily occur at the splicing joints, affecting sealing/wear resistance. |
| Installation Convenience |
Integrally formed, directly sleeved/embedded into equipment without splicing, welding, or adhesion. It simplifies the process and reduces human operation errors. |
Requires welding (or brazing) to connect with metal substrates. The welding process may cause ceramic cracking due to thermal stress, and the quality depends on craftsmanship, resulting in unstable reliability. |
Requires adhesive to attach multiple ceramic sheets. The adhesive is prone to aging (more obvious in high-temperature/corrosive environments), and splicing joints are weak points. |
| Performance Consistency |
Monolithic structure of a single material, with no connection parts. Mechanical properties (e.g., strength, hardness), wear resistance, and corrosion resistance are evenly distributed, with better stability under high-speed rotation/high-temperature and high-pressure conditions. |
Thermal stress occurs at the welding joint due to the difference in thermal expansion coefficients, easily leading to cracking or falling off, with local defects in performance. |
Splicing joints are prone to ceramic sheet falling off due to adhesive failure or particle impact, and the overall performance is greatly affected by splicing quality. |
| Wear Resistance & Sealing |
Forms a high-precision sealing surface with mating rings (e.g., silicon carbide). High hardness + low friction coefficient ensures minimum wear and extremely low leakage rate during long-term operation. |
The flat plate structure makes it difficult to form a precise sealing surface. Welding defects may cause uneven sealing surfaces, resulting in a high leakage risk, and wear resistance is restricted by welding quality. |
The sealing surface at the splicing joint is discontinuous, and particles are easily embedded in the gaps, accelerating wear, and the leakage risk increases with service time. |
| Adaptability to High Temperature & High Pressure |
Excellent high-temperature stability (melting point 2050℃) and low thermal expansion coefficient (approximately 7×10⁻⁶/℃). It maintains structural integrity under temperatures above 800℃ and pressures above 10MPa, without relying on adhesives or welding layers. |
The welding layer is prone to softening/oxidation at high temperatures, leading to a sharp increase in the risk of the ceramic plate falling off, and it cannot withstand high temperatures and high pressure for a long time. |
The adhesive is prone to decomposition at high temperatures, and the probability of the ceramic sheet falling off increases significantly in high-temperature environments. Splicing joints are easily damaged under high pressure. |
FAQ
Q1:What is alumina ceramic used for?A1:Alumina ceramics, due to their exceptional properties such as high hardness, wear resistance, corrosion resistance, high temperature resistance, and insulation, are extremely versatile. In addition to being used as linings for our core product, wear-resistant ceramic pipes, they are also widely used in a variety of industrial fields, including mechanical seals, wear-resistant liners and scrapers, ceramic bearings, electronic insulation substrates, chemical filler balls, and high-temperature furnace tubes. Alumina ceramics are a preferred solution for any application involving severe wear, corrosion, or where electrical insulation is required.
Q1:What are the disadvantages of alumina?A1:High brittleness and poor impact resistance: These are its primary drawbacks. Compared to metals, it is more susceptible to cracking or shattering when subjected to sharp impacts or intense thermal shock. Low toughness: Lacking the ductility of metals, it cannot absorb energy through deformation.High machining difficulty: Sintered alumina ceramics are extremely hard and can only be ground or cut using diamond tools, resulting in high costs for subsequent machining.
Q3: What temperatures can large-diameter ceramic pipes withstand?
A3: Conventional direct-bond ceramic pipes are suitable for temperatures ranging from room temperature to 150°C. For higher temperatures (e.g., up to 350°C), we offer special high-temperature-resistant adhesives or mechanical mounting solutions.
Q4: Can you customize non-standard sizes and special shapes?
A4: Of course. We have strong engineering and manufacturing capabilities and can produce a variety of special-shaped pipe fittings, including elbows, tees, reducers, and more, to perfectly complement straight pipes.
Q5: Is the installation method the same as traditional steel pipe?
A5: Yes. Large-diameter ceramic pipes retain steel flanges or welded connections and can be installed in exactly the same way as ordinary steel pipes. No special tools or changes to the existing piping design are required, making replacement quick and easy.
Q6: Can product specifications be customized? What is the turnaround time?
A6: We support custom specifications and can produce precisely according to customer drawings. The turnaround time is generally 20-25 days.
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