A vertical impact crusher (VSI – Vertical Shaft Impact Crusher) is a machine used for crushing rocks and minerals into smaller particles by accelerating material into a high-speed rotor and then impacting it against stationary anvils or rock beds. In South Africa, these crushers are widely used in mining, quarrying, and aggregate production due to their efficiency in producing well-shaped, cubical end products.
How a Vertical Impact Crusher Works (VSI Principle)
1. Feed Material Entry – Rocks or minerals are fed into the crusher through a central feed tube.
2. Acceleration by Rotor – A high-speed rotor throws the material outward at high velocity.
3. Impact & Crushing – The ejected material collides with either:
– Stationary anvils (rock-on-rock crushing)
– A rock bed (rock-on-metal crushing)
4. Particle Shaping – Repeated impacts break down the material into smaller, well-shaped particles.
5. Discharge – Crushed material exits through the bottom of the crusher.
Applications in South Africa
– Mining: Used for processing gold, platinum, diamonds, and other minerals.
– Quarrying: Produces high-quality sand and aggregates for construction.
– Recycling: Crushing concrete and asphalt for reuse.
Key Manufacturers & Suppliers in South Africa
– Pilot Crushtec (Local distributor of Metso & Sandvik VSI crushers)
– Metso Outotec (Nordberg Barmac VSI series)
– Sandvik Rock Processing Solutions
– Astec Industries (KPI-JCI)
Advantages of VSI Crushers in South Africa
✔ High reduction ratio
✔ Produces cubical-shaped aggregates (ideal for concrete & road construction)
✔ Lower operating costs compared to some cone crushers
✔ Can handle abrasive materials
Would you like recommendations on specific models or maintenance tips for vertical impact crushers in South Africa?
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