sluice concentration
Sluice: Gravity concentration units consisting of a slanting trough fitted with riffles or with moquette to trap the denser particles. Cone classifier: Hydraulic classifier consisting of pyramidal hopper with bottom apex. Spiral concentrator: Concentration device consisting of a spiral-shaped trough, along which the pulp flows. The finer and lighter particles are carried towards the outer edge, whereas the denser particles move towards the helix axis, where they are removed.
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