Vertical Shaft Impact Crushers (VSI) are a type of crusher used primarily for breaking hard and abrasive materials. They are widely used in quarries, mining industries, and recycling facilities. These crushers operate by using a high-speed rotating rotor to project materials against a hard surface, causing fragmentation due to impact forces.

Working Principle

VSI crushers function by accelerating material inside a spinning rotor and throwing it against a crushing chamber. The process involves:

  1. Material Feeding: Material enters from the top and is directed into the rotor.
  2. Acceleration: The rotor spins at high speeds (typically 50-80 m/s).
  3. Impact and Breaking: The material collides with wear-resistant surfaces or a rock bed inside the crushing chamber.
  4. Final Output: Once the material reaches the desired size, it exits the crusher.
Advantages
  • High Efficiency: Ideal for producing fine materials.
  • Better Shape: Produces more cubical aggregates.
  • Lower Wear Costs: When the material itself is used as the impact surface, wear parts last longer.
  • Versatile: Suitable for processing limestone, quartz, basalt, and many other hard materials.