The swaying feeder, which is suitable for evenly feeding granularmaterials from silo, is specially applicable for feeding for ball mill andbelt conveyor, However, it is not suitable for feeding dry powdermaterials or large sized particies, which would cause the dust pollutionor clogging ofdischarge port, The swaying feeder, with simplestructure and easy operation and maintenance, could be applied inproduction operation for pilot plant, small and medium ore dressingplant.