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Other Tracers & Products

Apart from our standard classes of tracers and magnets, Partition Enterprises has wide experience and capabilities in circuit performance testing. Please Contact Us to discuss any requirements in respect of the products listed below.

Tracers of Low and High Densities
Large and Small Tracers
"Naturally"-Shaped Tracers
Hydrophobic Tracers
Magnetic Index Tracers
Transparency Index Tracers
Breakage Index Tracers
Non Standard Tracers
Tracer Dispensers
Magnet Assemblies for Tracer Retrieval

Tracers of Low and High Densities

0.5 to 6.0 g/cc

Large and Small Tracers

Partition Enterprises has manufactured cubic density tracers with edge lengths up to 128mm. Our smallest standard cubic density tracers are 1mm on each edge. We can go a little smaller, but one needs to consider the relationship between the size of the tracer and the size and number of the incorporated particles which give the tracer the required properties. Statistical issues in respect of those filler particles cause the reliability of tracer density to deteriorate with decreasing size and increasing density. For densities up to about 2.8 g/cc there is the option of scalping out fine "off-density" tracers using float/sink techniques.

"Naturally"-Shaped Tracers

These are designed to mimic the shapes of ore particles and are produced by crushing. To avoid production of flakey or acicular particles, the crushing is undertaken in closed circuit with sieving at a number of aperture sizes. Sizes range from about 40mm down to about 0.5mm, and they are normally used in laboratory or pilot scale installations incorporating dense medium cyclones, jigs, spirals and elutriators. The above issues concerning accuracy of small cubic tracers apply equally to small "naturally"-shaped tracers. In well-operated dense medium cyclones there is usually little difference between a partition curve for ore particles and a curve for cubic tracers of a similar size.

Hydrophobic Tracers

These can be useful for testing grease tables and grease belts in diamond recovery. Partition Enterprises Luminescence Index tracers are useful in this regard. Many operators use grease separation as a scavenging operation following X-ray sorters. Low-luminescence LI tracers may be rejected (quite correctly) by the X-ray sorters, but recovered by the grease separator.

Magnetic Index Tracers

These are tracers with controlled levels of ferromagnetism (the property which causes attraction to a magnet).

Transparency Index Tracers

For sorters which assess particles for transparency to light.

Breakage Index Tracers

These may be of interest to diamond producers with concerns that process units may subject diamonds to impacts that cause breakage. Partition Enterprises does not currently manufacture such tracers, but would consider manufacture if there were a substantial market.

Non Standard Tracers

Partition Enterprises will sometimes agree to develop tracers for particular purposes that are not from any of our standard ranges. In these cases we will engrave each tracer with a dot on 2 opposite faces as an indicator that it is not from a standard range.

Tracer Dispensers

A Tracer Dispenser is used to add spiking or other tracers to a circuit at pre-determined intervals.

Description & Prices of Magnet Assemblies for Tracer Retrieval Magnet Assemblies for Tracer Retrieval

Partition Enterprises, in a 2001 research project, pioneered the production and use of lightweight magnets for tracer retrieval from process streams in Australian coal preparation plants. The magnets allow density tracer tests to be conducted by one person in as little as one hour (longer if there are many tracers to be sorted and counted) using a range of tracer sizes down to 2mm or less with feed on, for a realistic “full load” partition curve without the need for costly loss of production.One magnet supplier has designed magnets for this application, but some resulting installations were not satisfactory.
Consequently, from 2008, Partition Enterprises manufactures and markets safe, lightweight, permanent magnets for this application for tracer retrieval.
They weigh approximately 18 kg per metre and are typically lifted into DMS drain-and-rinse screen launders, supported from the launder walls, just out of the process stream. Tracers are added to the discharge from a feed preparation screen, and the user has about 1 minute to slide the magnets forward to intercept the streams falling from the drain-and-rinse screen lips, before the first tracers come through. The magnets are oriented to allow ore to bounce and slide off, but to capture the tracers. After about 5 minutes, the magnets are pulled back out of the process stream, ore is gently hosed off, and the tracers are picked off for sorting and counting. A set of magnets for one circuit in a plant can, in most cases, be easily moved to test other similar circuits.
Being lightweight, the magnets should not be subjected to the wear of an impacting process stream for extended periods. Further, extended periods in the process stream before a test can hinder tracer capture by allowing buildup of tramp iron, ferromagnetic ore or fine particles. An assembly can be composed from standard modules which are available in lengths of 305mm, 610mm, 915mm and 1000mm.
The length of a magnet assembly should slightly exceed the width of the screen with which it is to be used. For a 3 foot screen we would suggest a 1000mm magnet module.

Screen Width (feet/mm)

Recommended Modules




1000 + 305


1000 + 915


1000 + (2 x 610)


1000 + 915 + 610


1000 + (2 x 915)


1000 + 915 + (2 x 610)


1000 + (2 x 915) + 610


1000 + (3 x 915)

The support brackets are very simple and will be suitable for many screen/launder combinations. In some plant layouts, or for very long assemblies, the client may need to design an alternative magnet support system. We can provide dimensioned drawings of the magnet modules and support brackets.


Magnet Assembly Information

CAUTION: Strong Magnets These units contain small permanent magnets and their magnetic field is very localised.It is recommended that:

  • The removable “keeper” plates be fitted when the magnets are not in use.
  • Credit cards and electronic devices should be kept at least 20cm away.
  • People with heart pacemakers should not approach within 1 metre.

MAGNET GUARANTEE: These units are guaranteed for 6 months against faults in materials or workmanship. The guarantee is void if they are modified in any way or exposed to severe impact or temperatures exceeding 80 degrees Celsius. They are designed to be lightweight and should not be left in abrasive process streams for more than about 5 minutes per test. They are not guaranteed to be suitable for any specific installation. The purchaser is urged to satisfy himself or herself that:

  • they are capable of retrieving a satisfactory proportion of tracers without excessive interference by ferromagnetic ore particles or by tramp ferrous items in the process stream.
  • the dimensions of the Magnet Assemblies and the Support Brackets are suitable for use in the particular installation.

If the Type 1 Support Brackets are unnecessarily long they may be shortened, without affecting the guarantee, by cutting an appropriate length off the lower end. If you consider the standard Support Brackets unsuitable for your installation, you may omit them from your order, and make other provisions for support of the magnet assemblies. Consideration should be given to fitting a safety wire in case an assembly is dropped, for example, into a launder.





1 metre lightweight Magnet



915mm lightweight Magnet



610mm lightweight Magnet



305mm lightweight Magnet



Support Brackets (for one assembly)