The presentation shows examples of the use of on-line sensors in pre-concentration when analyzing ore and waste rock in drill cores, drill cuttings, on conveyor belt and in bulk ore sorting. Furthermore, it covers cases in ferrous and base metals and in gold mines.

Waste rock removal in preconcentration has direct effect on energy consumption in crushing and grinding and chemicals in concentrator. In concentrator waste is separated and goes to tailings pond, however, preconcentration directly reduces the volume of the tailings.

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