A circular vibrating screen works by using a vibration motor (or two eccentric motors) as the excitation source. When the motor rotates, the eccentric block generates a centrifugal force that causes the screen box to move in a circular or approximate circular trajectory.
- The material is fed onto the inclined screen surface.
- Driven by circular vibration, the material continuously bounces forward and spreads evenly on the screen mesh.
- Particles smaller than the mesh size fall through the screen → underflow product.
- Larger particles move along the screen surface to the discharge end → overflow product.
The circular motion ensures good material stratification, high screening efficiency, and stable operation. It is widely used for grading powder, granules, sand, gravel, food, chemical, and mining materials.