An Impact Crusher is a type of crushing machine that uses impact force to break down materials. Il est largement utilisé dans l'exploitation minière, construction, and recycling industries to crush rocks, béton, et d'autres matériaux durs en plus petits, uniform-sized particles.

How an Impact Crusher Works:
1. Entrée de matériel: Feed material enters the crushing chamber.
2. High-Speed Rotor Impact: A rotating rotor with hammers or blow bars strikes the material at high speed.
3. Impact & Shattering: The material is thrown against stationary impact plates (enclumes), causing it to break apart.
4. Contrôle de la taille: Adjustable aprons or curtains control the output size by regulating how long particles stay in the crushing zone.
5. Décharge: Crushed material exits through the bottom.

Types of Impact Crushers:
1. Horizontal Shaft Impact Crusher (HSI)
- Uses a horizontal rotor with hammers/blow bars.
- Best for softer materials like limestone and recycled concrete.
- Produces a more cubical product.

2. Concasseur à percussion à arbre vertical (TOUT LE MONDE)
- Uses a vertical rotor with high-speed impellers.
- Ideal for shaping hard and abrasive materials (par ex., sand production).
- Provides better particle shape for aggregates.

Avantages:
✔ Rapport de réduction élevé (jusqu'à 20:1)
✔ Good cubical product shape (better than jaw crushers)
✔ Efficient for medium-hard to soft materials
✔ Adjustable output size

Inconvénients:
✖ Higher wear on blow bars/hammers (especially with abrasive materials)
✖ Less effective for very hard rocks compared to cone crushers

Applications:
- Carrières & exploitation minière (calcaire, charbon, etc.)
- Recyclage (béton, déchets de démolition d'asphalte)
- Production de granulats pour la construction

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