Zibo Chenyi Advanced Materials Co., Ltd. is one of the leading manufacturers and suppliers of rubber backed alumina pipe linings in China, also supports customized service. If you're going to buy CE approved rubber backed alumina pipe linings made in China, welcome to get quotation from our factory. Quality products and low price are available.
Rubber Backed Alumina Pipe Linings for Mining, Power, Cement Plant
Rubber Backed Alumina Pipe Linings is a ceramic material with more than 92% AL2O3 as the main raw material and corundum (α-AL2O3) as the main crystal phase.
It has high mechanical strength, high hardness, high insulation resistance at high temperature, chemical corrosion resistance and thermal conductivity. Good and other excellent comprehensive technical performance, high density, low wear, impact resistance product performance characteristics, smooth surface and convenient construction, mainly used in wear-resistant linings of equipment in coal, coal preparation, steel, mines, thermal power plants and other industries, especially suitable It is widely used in heavy medium coal conveying pipelines of coal preparation plants, conveying channels of mines and wharves, discharge ports of spiral pipes of falling troughs and dust equipment, etc.
Structure and Principle
Structure Composition: It mainly consists of two parts, one is the alumina ceramic layer, and the other is the rubber backing layer. The alumina ceramic layer is the part that directly contacts the fluid or material inside the pipeline, usually made of high-purity and high hardness alumina materials, such as 92%, 95%, or 99% alumina ceramics. The rubber backing layer is tightly attached to the back of the alumina ceramic layer, providing support and cushioning.
Working principle: When there is material flow in the pipeline, the alumina ceramic layer, with its high hardness and wear resistance, resists the erosion, wear, and corrosion of the material, protecting the pipeline body from damage. The rubber backing layer plays an elastic buffering role, absorbing the energy generated by material impact, reducing the impact force on the ceramic layer, and preventing the ceramic layer from cracking or falling off due to impact. At the same time, the rubber backing layer can also play a certain sealing role, preventing materials from penetrating into the pipeline wall through the gaps of the ceramic layer.
| Feature | Advantage |
| Abrasion Resistance | Alumina (Al₂O₃) tiles (Mohs 9) outlast steel by 10–20x. |
| Impact Absorption | Rubber backing prevents ceramic cracking from shocks. |
| Corrosion Resistance | Resists acids, alkalis, and seawater. |
| Noise/Vibration Damping | Rubber reduces system noise and pipe fatigue. |
| Lightweight | Easier to install than solid ceramic or steel liners. |
| Lining Type | Abrasion Resistance | Impact Resistance | Corrosion Resistance | Temp Limit | Cost | Best For |
|---|---|---|---|---|---|---|
| Rubber Backed Alumina | Excellent | Excellent | Excellent | Medium | High | Severe abrasion & impact |
| Pure Ceramic Tiles (Epoxy Bonded) | Excellent | Fair (Brittle) | Excellent | High | High | Pure abrasion, high temp |
| Pure Rubber Lining | Good | Excellent | Good | Low | Medium | Slurries with fine abrasives |
| Hardened Steel (AR400) | Good | Good | Poor | High | Medium | Moderate abrasion, high impact |
| Urethane / Polyurethane | Very Good | Excellent | Good | Low | Medium | Coarse, heavy impact slurries |
Applications
Mining & Mineral Processing: Tailings lines, mill discharge, hydrocyclone feed, magnetite slurry, sand transfer.
Coal-Fired Power Plants: Fly ash and bottom ash slurry lines.
Cement Industry: Raw mill slurry, cement kiln feed, dust handling.
Steel Industry: Scale slurry, dust transport.
Dredging: Slurry discharge lines on dredgers.
Comparison to Alternative Liners
| Lining Type | Abrasion Resistance | Impact Resistance | Corrosion Resistance | Temp Limit | Cost | Best For |
|---|---|---|---|---|---|---|
| Rubber Backed Alumina | Excellent | Excellent | Excellent | Medium | High | Severe abrasion & impact |
| Pure Ceramic Tiles (Epoxy Bonded) | Excellent | Fair (Brittle) | Excellent | High | High | Pure abrasion, high temp |
| Pure Rubber Lining | Good | Excellent | Good | Low | Medium | Slurries with fine abrasives |
| Hardened Steel (AR400) | Good | Good | Poor | High | Medium | Moderate abrasion, high impact |
| Urethane / Polyurethane | Very Good | Excellent | Good | Low | Medium | Coarse, heavy impact slurries |
Best For:
• Rubber-backed alumina: High abrasion + moderate impact (e.g., slurry pumps).
• Pure ceramic: Extreme wear, no impact (e.g., straight pipelines).
• Steel: Heavy impact, low-to-medium abrasion.
Customization Options
• Ceramic Grade: 92% Al₂O₃ (standard) vs. 95% (premium wear).
• Rubber Type: Natural Rubber: Best for impact resistance.
• EPDM: Heat/weather resistant.
• Nitrile: Oil/fuel resistance.
• Reinforcement: Steel-backed for high-pressure systems.
Installation Process Overview
Surface Preparation: The internal surface of the steel pipe is blasted to near-white metal (SA 2.5) to ensure maximum adhesion.
Adhesive Application: A high-strength, flexible epoxy adhesive is applied to the prepared steel surface.
Lining Installation: The rubber-backed alumina sheets are carefully pressed into the pipe, ensuring full contact and working out any air pockets. For pipes, the sheet is often rolled in.
Curing: The adhesive is allowed to cure fully according to the manufacturer's specifications before the pipe is put into service.
FAQ
