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Typically, Density Tracers are plastic particles which incorporate powders or other materials to impart suitable combinations of properties including density and colour. They are used to determine partitioning characteristics of density separators and other units accurately, rapidly and at low cost. Primitive forms of density tracers have probably been in use for many years, but they were developed for routine use in De Beers diamond mines around 1970, and by the Julius Kruttschnitt Mineral Research Centre for coal processing around 1980. Today, those industries remain the dominant users, but density tracers are also utilised in iron ore, gemstone and magnesite processing and in diverse research applications.

Diamond Tracers

Density Tracers for density partition curves:

• Feed-on tests for reliable results, tracers retrievable by magnets or X-ray sorters

Spiking Tracers for estimating losses of liberated diamonds:

• Insert them anywhere in the ore transport or processing chain. Retrieve them from the glove box.

Luminescence Index Tracers for testing at specific luminescence levels or for generation of luminescence partition curves:

• Translucent for diamond-like behaviour in calibration and testing of X-ray sorters of all configurations.
  
• Hydrophobic for simulation of diamonds in grease-based recovery.
  

Coal Density Tracers - for reliable partition curves in feed-on tests

Large Nonmagnetic Tracers for manual retrieval.

Smaller Ferromagnetic Tracers for retrieval using magnets will be offered if a market for them becomes apparent.

Other Minerals, Other Products

Magnets - lightweight, safe to operate, efficient recovery of tracers down to 2mm or smaller.

Tracer Dispensers - to add spiking or other tracers to a circuit at pre-determined intervals.

We also have experience with:

• Density Tracers up to 6.0 g/cc for iron, chrome, nickel and other minerals.
• Remote tracer identification by radio frequency identification, RFID.
• Simulants with controlled levels of ferromagnetism or transparency.

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