Impact crusher is a type of mechanical crusher that uses high-speed impacts to break up material. They is commonly used in the mining, quarrying, and recycling industries. There is two main types of impact crusher: vertical shaft impactors (VSI) and horizontal shaft impactors (HSI).

Vertical Shaft Impactors (VSI)
VSI crusher is characterized by the vertical orientation of their rotor shaft. The material being crushed is fed into the crusher chamber and is then accelerated by the rotor. The material is then thrown against a wear plate or anvil, where it is broken up. VSI crusher is typically used for secondary and tertiary crushing applications. They is known for their ability to produce a cubical product with a low fines content.
Horizontal Shaft Impactors (HSI)
HSI crusher is characterized by the horizontal orientation of their rotor shaft. The material being crushed is fed into the crusher chamber and is then struck by hammers or bars attached to the rotor. The material is then broken up as it is thrown against the crusher chamber walls. HSI crusher is typically used for primary and secondary crushing applications. They is known for their ability to handle large feed sizes and produce a high production rate.

Comparison of VSI and HSI crusher
| Feature | VSI crusher | HSI crusher |
|---|---|---|
| Rotor orientation | Vertical | Horizontal |
| Crushing mechanism | Material is thrown against a wear plate or anvil | Material is struck by hammers or bars |
| Typical applications | Secondary and tertiary crushing | Primary and secondary crushing |
| Advantages | Produces a cubical product with a low fines content | Can handle large feed sizes and produce a high production rate |
| Disadvantages | More expensive than HSI crusher | Less efficient than VSI crusher |
The choice of whether to use a VSI or HSI crusher depends on the specific application. VSI crusher is a good choice for applications where a cubical product is required, while HSI crusher is a good choice for applications where high production rates is required.
Additional Considerations
In addition to the factors discussed above, there is several other factors that should be considered when selecting an impact crusher, such as:
- The type of material being crushed
- The desired product size
- The required production rate
- The available budget
It is important to consult with a qualified expert to select the right impact crusher for your specific application.
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