Features 1. SWLY series impeller feeder is composed of intercross impellers, and with an even feed. 2. Self-cleaning magnetic separator, uniform distribution, iron-removal with speediness by self, good effect. 3. Axial direction of hammer mill is uniform to feed which can reduce abrasion of hammers and vibration, enhance the service life. 4. To be intact aspiration adjusting device combined with hammer mill 5. RPM can be easily adjusted by FC Inverter easily 6. It can be fulfilled automatic control with control of current of main motor