EVALUATION OF SENSOR-BASED SORTING TECHNOLOGIES FOR PRECONCENTRATING GOLD ORE

2023

J.E. Danoczi

Methods to preconcentrate and upgrade orebodies prior to processing are being investigated as a necessity to ensure mining remains viable and environmentally acceptable. There are a variety of sensor-based sorting technologies to choose from and determining which sensor/technology is best suited for the preconcentration of an orebody ensures the best results for the task. To assess the viability of various sensors, the orebody first requires an understanding of its physical, metallurgical and chemical properties (ore characterization for sensor-based sorting). This information as well as an understanding of how sensors interact with minerals, facilitates the selection of the viable technologies for further testing.


The objective of this investigation was to evaluate four sorting technologies (XRT, laser scattering, colour and mid infrared), for preconcentrating an orogenic gold deposit. In this study, all four sorting technologies were able to preconcentrate the ore to varying degrees, but only mid infrared, colour and laser scattering provided viable results

Keywords: Sensor-based sorting, particle sorting, bulk sorting, preconcentration, response time, XRT, infrared, laserscattering, colour sorting, gold
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