Equipment fabricated by Baltic Scientific Instruments (headquartered in Riga, Latvia, European Union) is widely used in mining and metallurgical industries; in the nuclear industry; and in environmental monitoring, security and scientific applications in global markets. One of the latest BSI developments is a mobile facility for gold ore gamma-activation analysis.

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Gamma-activation analysis (GAA) is a method uniquely suited to the analysis of ore samples for gold, other precious metals and complementary elements. It is based on the irradiation of ore samples with high energy gamma quanta generated by a linear accelerator, and detection of the induced activity of the excited gold nuclei by a gamma spectrometer. The high penetrating power of gamma radiation facilitates the analysis of large samples, eliminating the need to crush and grind the sample, while offering the following advantages over conventional methods:

  • a significant increase in the accuracy of the analysis representation;
  • reduced analysis time due to the short half-life of excited gold nuclei: just 20-30 secs;
  • sufficient analysis sensitivity, accuracy, selectivity, representativeness and productivity required for modern gold mines. For gold ore content up to 1 ppm, measurement deviation of 8% or below, while ore content with up to 10 ppm comes with a deviation of 4% or below;
  • consistent analysis results regardless of chemical composition of the sample;
  • no negative impact on the environment: the induced activity of the sample decreases to background levels several minutes after analysis is concluded;
  • non-destructive processing of ore samples, allowing repeated analysis of ore sample;
  • the method allows multi-element analysis over the course of a single cycle and measurements;
  • ability to automate the GAA analysis; and
  • can be incorporated into a quality control/assurance process for gold mining and extraction of particular minerals and elements.

A technical review of this gold analyzer can be accessed at the International Atomic Energy Agency (IAEA) conference materials.

For applications where such high detection sensitivity as parts per million offered by GAA is not essential or cost-justified, Baltic Scientific Instruments produces the CON-X On-line XRF Conveyor Analyzer. This XRF analyzer is used to identify and measure the concentration of the elements and minerals in ores and materials on a conveyor belt. The analyzer detects elements from Al (Z=13) to U (Z=92). It can be easily attached to a flow-line at digging locations and mines, and has proved itself reliable in the following applications:

  1. Analysis of iron ore and concentrates
  2. Analysis of iron (as a trace element) in sand
  3. Analysis of chromite ore and concentrates
  4. Analysis of copper ore and its concentrates
  5. Analysis of zinc ores
  6. Analysis of polymetallic ores (zinc, copper, lead)
  7. Analysis of cobalt content in ores and concentrates
  8. Analysis of rutile and ilmenite (Ti)
  9. Analysis of zircon ores (Zr)
  10. Analysis of sylvinite (KCl)
  11. Analysis of nickel in a concentrated product
  12. Analysis of silver ore (Ag)
  13. Analysis of limestone (CaCO3)
  14. Quantitative analysis of uranium and its production waste
  15. Analysis of phosphatic materials
  16. Analysis of thorium

The CON-X On-line XRF Conveyor Analyzer features:

  • The CON-X is mounted above the conveyor and identifies the elements and their concentration in the material on the conveyor
  • High precision and stability of the results in severe environments – dust, low or high temperature and variable humidity
  • Independence of the measurement results from lump size and relative humidity, as long as the CON-X is in the allowable range (6–25cm) from the material
  • Simple and convenient operation and service
  • Empty belt exclusion algorithm
  • Remote support through the internet
  • Instrument control and data results provided using OPC communication, 4–20mA output and ethernet

Please don’t hesitate to contact us to discuss the potential possibilities of our co-operation!