Impact Crushing
Impact Crushers use impact rather than pressure to crush materials. The desired material is contained within a small chamber with openings on the bottom, end or side of the machine to allow pulverized materials to escape once the crushing process is complete.
The impact crusher is most effective when used with soft, non-abrasive materials such as coal, seeds, limestone, gypsum or soft metallic ores. There are two types of impact crushers:
- Horizontal shaft impactor (HSI) which breaks the rock by impacting it with hammers which are fixed upon the outer edge of a spinning rotor.
- Vertical shaft impactor (VSI) uses a high speed rotor with wear resistant tips and a crushing chamber which propels the rock, smashing it into smaller pieces.