A metal detector crusher refers to a system that combines a metal detector with a crusher (or shredder) to protect industrial machinery from metal contamination. Here’s how it works and its key applications:
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How It Works:
1. Metal Detection:
– A metal detector scans raw materials (e.g., plastic, wood, food, or waste) before they enter the crusher.
– If metal (ferrous, non-ferrous, or stainless steel) is detected, the system triggers an alarm or stops the conveyor.
2. Rejection Mechanism:
– Some systems automatically reject contaminated material using an air blast, diverter arm, or conveyor stop.
– In crushing applications, the detected metal may be removed manually or automatically before processing.
3. Crusher Protection:
– Prevents metal objects (nails, bolts, tools) from damaging crusher blades, hammers, or grinding components.
– Extends equipment lifespan and reduces downtime.
Applications:
– Recycling Plants: Detects metals in waste before shredding (e.g., plastic recycling).
– Mining & Aggregates: Protects crushers from tramp metal in rocks/gravel.
– Food Processing: Ensures no metal enters grinders or mills.
– Biomass/Wood Processing: Removes nails or staples before chipping.
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Types of Metal Detectors for Crushers:
– Conveyor-Belt Metal Detectors: Installed before the crusher inlet.
– Pipeline/Gravity-Feed Detectors: For free-fall materials.
– Integrated Crusher Systems: Some crushers have built-in metal detection.
Key Benefits:
✔ Prevents costly machinery damage
✔ Reduces maintenance and repair costs
✔ Improves product purity (in food/recycling)
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