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Diamond Spiking Tracers & Applications

Description & Prices of Spiking Tracers for Diamond Applications

Spiking Tracers mimic the density of a valuable mineral and are used in situations where the mineral particles are well liberated. Their most common application is to test for recovery of free diamonds from an alluvial deposit. They can be inserted in the ore stream anywhere between the pit and the final sorting stage. If that final sorting stage utilizes X-ray sorters, the tracers should luminesce strongly under X-rays to ensure none will be rejected at that point. Thus, if 100 spiking tracers are added to a plant feed conveyor and 90 are recovered by the sorters, one may estimate that 10 percent of diamonds are being rejected by the processing units between those points. The metallurgist may then seek the cause of those rejections by conducting further spiking tests, with different addition points, or a density tracer test to determine the partition curve.

Diamond Spiking Tracers are available in 6 standard colours. Colour affects luminescence output. At the 8mm size light outputs are high, ranging from approximately LI 200 to LI 500 (16,000mV to 40,000mV). Colour may be used as an indicator of the position or time at which a particular group of tracers was added to a circuit.

Spiking Tracers offer the following:

  • Certified: Each shipment includes Quality Control Certificates for accuracy of density (100% within 0.02 g/cc of nominal density).

  • Discounts: 5% discount where 500 or more of the same item are ordered eg. 500 x 8mm RD 3.53 Green. 2.5% discount for pre-payment at the time of ordering.

  • Non Toxic: Contain no lead compounds.

  • Luminescent: Highly luminescent for retrieval by X-ray sorters. Because they are opaque to visible light, tracers of this type in sizes 4mm or smaller may not be reliably recovered in sorters (such as Flowsort) configured such that the x-ray source and photomultiplier tube face different sides of the particle. Translucent Luminescence Index Tracers are designed for calibration and testing of all classes of X-ray sorters.

  • Nonmagnetic: Are nonmagnetic to avoid problems in circuits which incorporate magnets.

  • Fast Delivery: Common sizes couriered to your store in 1-2 weeks.

  • No Hidden Costs: Prices include packaging and handling.  Freight will be advised in an emailed quotation, where applicable.

  • Credit: For many clients we accept 30 day payment terms.

  • Colours: Light Blue, Cream, Green, Lilac, Blue/Green, Yellow.

Export Prices are in AUD (Australian Dollars)

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Diamond Spking Tracers applications…
Spiking Tracer Testing

Spiking tracers are most commonly used in plants which process liberated diamonds from alluvial deposits. They are designed to test the ability of a circuit to direct diamonds to density separator concentrate. They have density 3.53 g/cc and they luminesce brightly so there is little likelihood of any being lost to sorter rejects. On the face of it, testing is easy!
For example:

  • Ten 8mm spiking tracers are selected.
  • Their colour is green. This can be used as an indicator of where in the plant they are to be inserted.
  • They are inserted in the mixing box for DMC Module 2.
  • Recovery schedules indicate that all should be collected at the glovebox within 36 hours.
  • After 36 hours, nine 8mm green tracers have been retrieved at the glovebox.
  • The efficiency of Module 2 in recovering 8mm (9 carat) diamonds is estimated as 90% (9/10 x100).

But one really should consider the statistics of the situation. We have conducted 10 Binomial Trials (experiments with only 2 possible outcomes.) For 9 of our experiments the outcome was "success”. There are numerous online calculators to help us estimate the underlying probability (that diamonds of that size will report to the X-ray sorters).
View Calculator
Our estimate of the probability was 90%, and the statistics tell us that we can be 95% confident that our diamond recovery rate is greater than 57%.

Better to use more tracers. If you insert 1000 and recover 900, you can be 95% confident that you are recovering at least 88% of the diamonds. The calculator also shows that you can have 95% confidence that you are losing at least 8% of them.