Roll crusher plates, also known as crushing rolls or roll shells, are the key wear parts of a roll crusher. They come in direct contact with the material being crushed and are designed to withstand high pressure, abrasion, and impact. Here’s an overview of their features, materials, and maintenance:
1. Types of Roll Crusher Plates
Roll crushers typically have two rolls (single or double roll crushers), and the plates can vary based on:
– Smooth Rolls: Used for fine crushing with minimal fines generation (e.g., coal, soft minerals).
– Corrugated Rolls: Feature ridges or teeth for better grip and crushing efficiency (e.g., hard ores, aggregates).
– Toothed Rolls: Designed for coarse crushing with interlocking teeth to prevent slippage (e.g., limestone, coal).
2. Materials Used
Roll crusher plates are made from wear-resistant materials to prolong service life:
– High Manganese Steel (Mn13, Mn18): Hardens under impact, ideal for abrasive materials.
– Chrome-Molybdenum Alloy Steel: Offers high hardness and toughness.
– Tungsten Carbide Overlays: Used in extreme abrasion conditions.
– Cast Iron with Ni-Hard Liners: Suitable for less abrasive applications.
3. Key Features
– Replaceable Design: Plates can be swapped when worn out without replacing the entire roll.
– Hardfacing Options: Some plates are reinforced with welded hardfacing to extend lifespan.
– Custom Tooth Profiles: Optimized for specific materials (e.g., sharp teeth for soft rock, blunt teeth for hard rock).
4. Common Applications
Roll crusher plates are used in industries such as:
– Mining (coal, iron ore)
– Cement production
– Chemical processing
– Aggregate crushing
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5. Maintenance Tips
– Regularly inspect for wear and cracks.
– Rotate or replace plates when wear exceeds 50% of original thickness.
– Ensure proper alignment to avoid uneven w.jpg)
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– Use lubrication if required (depending on design).
6. Leading Manufacturers
Some well-known suppliers include:
– Sandvik
– Metso
– FLSmidth
– Terex
– Local foundries specializing in wear parts.
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