Knowledge of the mine resource base is one of the most important assets a mine has. Currently, the information of the resource base and mineral composition is collected and determined by off-line laboratory analysis. Sample pre-treatment prevents obtaining real time results and thus process monitoring and controlling efficiency is not optimized.
Slow off-line measurements are not the only option anymore. Raman spectroscopy provides a fast and easy-to-use method for mineral identification and concentration quantifications revealing each material’s unique spectral fingerprint, the Raman spectrum. SpectOre product family is based on Timegated® Raman technology. It provides reliable, real time mineralogical information – fast, accurate and on-line without any sampling errors.
Raman Spectroscopy in mining industry
Raw material variability causes uncertainty in managing of the natural resource being mined. Separation of the valuable minerals from waste rock and gangue can save a lot of money. Currently, determining mineralogical composition is based on off-line laboratory analyses. The SpectOre product family provides a viable solution for efficient, real-time and on-line / in-line mineralogical analysis for quality and process control purposes as well as for resource identification.
Raman technology offers several useful advantages for process monitoring. Until now, the fluorescence interference has been a major limitation for the wider adaptation of Raman spectroscopy in process applications. Time-gated Raman technology offers real-time information about mineral composition of processed material flows. The SpectOre instrument can analyze and monitor flotation processes in mineral enrichment plants.
High temperatures are often challenging for spectroscopic analyses. Time-gated Raman technology does not suffer from thermal emission interference so it can also be used at high temperatures.
Timegate Instruments has successfully measured spodumene conversion rates during batch kiln furnace tests, where the alpha spodumene concentration was heated up to 1000 °C to yield beta spodumene. The information is needed for efficient conversion parameter optimization. See more about this application area in the Case Study of Keliber Lithium Project.