Spare Part

Rubber Liners

Rubber lining sheets and bonded panels for mill shells, chutes, pump casings, and slurry handling equipment.

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Overview

About this part

Rubber liners protect equipment surfaces that handle slurry, fine wet materials, or impact-rich wet duty. Common applications include mill shells in fine grinding, slurry pump casings, chutes carrying wet coal, and pipeline elbows. Rubber resists fine-particle erosion well, and absorbs impact better than metal or ceramic in many wet applications. Compound selection (natural rubber, polyurethane-modified, abrasion-resistant nitrile) is matched to the wear mode and chemistry.

Compatibility

Compatible Equipment

Materials

Material Options

Natural rubber
Highest abrasion resistance against fine, wet particles. Standard for slurry pump wet ends.
Soft natural rubber compound
Used for high-impact, fine-particle wet duty (mill shell lining).
Nitrile rubber
Used where oil or hydrocarbon contamination is present.
Polyurethane-modified rubber
Compromise between rubber resilience and polyurethane wear resistance.
Specifications

Technical Specifications

Rubber Liners
Specification Value Unit
Thickness 6–40 mm
Hardness 40–70 Shore A
Bond Type Vulcanized bond, cold bond, or mechanically retained
Form Factors Sheet, molded panel, pump-casing kit
Wear behavior

Wear Factors

  • Particle size and angularity
  • Slurry velocity
  • Slurry temperature
  • Chemistry (pH, oils, organics)
  • Adhesive bond integrity to substrate
Replacement

Replacement Notes

Rubber liners are replaced when wear progresses through the working thickness or when the bond to the substrate fails (indicated by blisters or detached panels). Bond failure is often more damaging than wear because it allows slurry behind the liner, eroding the substrate itself.

Related Equipment

Centrifugal slurry pump

Slurry Pumps

Centrifugal slurry pumps for coal preparation tailings, dense medium circuits, dewatering, and mine water service.

20–4,000 m³/h Coal slurry, tailings, dense medium, mine water with fines
Filter press

Filter Presses

Membrane and plate-and-frame filter presses for dewatering coal preparation tailings and fine slurries.

1–80 m³ filter chamber volume Coal preparation tailings, fine slurries
Frequently Asked

FAQ

When does rubber outperform steel or alloy in wet duty?

Rubber outperforms metal in fine-particle slurry erosion (particles below about 5 mm) where the wear mode is small-scale impingement. It also outperforms metal at moderate impact loads because the rubber deforms and recovers, while metal accumulates plastic damage. Above particle sizes around 10–15 mm, hard-metal alloys typically perform better.

Vulcanized or cold-bonded rubber lining — which is better?

Vulcanized bonding (rubber bonded during cure) is the strongest and is standard for new pump wet ends and mill shells. Cold bonding (post-cure adhesive) is used for in-situ relining where vulcanization is impractical, and produces a slightly weaker bond.

How is rubber compound hardness selected?

Soft rubber (40–50 Shore A) absorbs impact and is preferred for high-impact wet duty. Hard rubber (60–70 Shore A) resists cutting and gouging from larger or sharper particles. Slurry pump wet ends typically use mid-range hardness around 55–60 Shore A.

What causes rubber lining bond failure?

Common causes include inadequate surface preparation (failure to remove millscale or oil), substrate temperature outside the adhesive cure window, mechanical stress concentrations at panel edges, and chemical attack on the adhesive layer. Once bond fails, slurry penetrates behind the rubber and accelerates substrate corrosion.

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