Material handling

Detection of tramp metal



Tramp metal such as bucket teeth, drill bits, bore crowns, tools and more, left in mined material and stock piles present a significant risk of blocking or damaging primary crushers. Providing a simple, reliable and cost-effective solution for the detection of tramp metal before it enters the crushing circuit can avoid a costly production delay.


The uncrushables detection system incorporates a metal detector fitted inside the bucket of a digging machine. Any tramp metal objects entering the bucket during digging will trigger an alarm to the cab operator.

This new technology encompasses an innovative combination of hardware and software to manage the challenge of detecting relatively small metal items using a detector that is itself embedded in a large steel bucket. Real-time detection notification is fed to the cab operator who can take appropriate action to prevent dispatch of the payload to crushers or other equipment susceptible to damage or blockages.

The ground-breaking tramp metal detection approach requires minimal sensing equipment at the bucket. Commercial versions will discreetly integrate the detector coil into the bucket design for optimum protection and minimal interference with material flow during digging and dumping.


  • Prevents costly equipment damage
  • Reduces production delays and downtime
  • Improves safety as personnel are not required to enter the crusher to recover tramp metal.


Site trials have been conducted which validate the effectiveness of the technology. Detectors fitted to Load-Haul-Dump and Front-End-Loader buckets have illustrated the scalability and application of the technology.

Mining3 is working with ESCO, an equipment metal parts manufacturer, to incorporate the uncrushables detection technology into the bucket design.
The technology will be extended to other earth moving equipment.


Access the latest Uncrushables factsheet.