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Spiral sorting machine is draws support with a solid grain of size is different, the proportion is different, thus in the liquid settling rate different principle, a thin ore grain of float becomes the overflow in the water, the coarse ore grain sinks in the Groove. Screw to the upper discharge, mechanical classification a grading equipment, powder mill grinding the material to filter, and then screw the vanes spin coarse material into mill inlet, filter fine material from the overflow pipe. The machine base channel steel, filled with plates welded together. Screw shaft into the head, shaft, used iron sets, wear-resistant and durable, lifting device of electric and manual two