A vibrating screen is a mechanical equipment used to separate materials by particle size, commonly employed in industries like mining, construction, agriculture, et recyclage. It works by using vibration to sift and sort bulk materials into different grades or remove impurities.

Key Components of a Vibrating Screen:
1. Screen Box/Deck: The frame holding the screening surface (mesh or perforated plates).
2. Vibrating Mechanism: Generates vibrations (par ex., eccentric shafts, unbalanced motors, or electromagnetic drives).
3. Média d'écran (Engrener): Fil tissé, polyuréthane, or rubber panels with specific aperture sizes.
4. Springs/Dampers: Isolate vibrations and support the screen structure.
5. Système d'entraînement: Electric motor with belts or direct drive for power transmission.

Types of Vibrating Screens:
1. Linear Vibrating Screen
- Moves in a straight line; ideal for dry or wet fine screening.
- Common in aggregate and mining industries.

2. Circular Vibrating Screen
- Uses a circular motion; suitable for medium to coarse materials.
- Often seen in quarrying and mineral processing.

3. High-Frequency Vibrating Screen
- Operates at high speeds (jusqu'à 7,200 RPM) for fine particles (par ex., sable de silice, minéraux).

4. Banana Screen (Multi-Slope Screen)
- Features variable deck angles for higher capacity in wet screening applications.

5. Écran à tambour (Rotary Screen)
- A rotating cylindrical sieve used for composting, tri des déchets, etc..

Applications:
- Exploitation minière & Carrières: Sorting crushed stones, minerais, charbon.
- Aggregate Industry: Grading sand, gravier.
- Recyclage: Separating plastics, métaux, waste materials.
- Agriculture: Grain cleaning and seed sizing.
- Chimique & Transformation des aliments: Powder classification.

Avantages:
✔ High efficiency in material separation.
✔ Adjustable vibration intensity & angles d'écran.
✔ Handles wet or dry materials.
✔ Low maintenance compared to static screens.

Inconvénients:
✖ Noise and dust generation may require mitigation.
✖ Wear of screen mesh over time (especially abrasive materials).

Critères de sélection:
- Material type (taille, teneur en humidité).
- Required throughput capacity.