A double deck vibratory screen is a type of screening equipment used in various industries (such as mining, aggregates, recycling, and food processing) to separate materials into different sizes using two stacked screening decks. Each deck has its own mesh or screen media, allowing for more precise classification of particles.
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Key Features of a Double Deck Vibratory Screen:
1. Two Screening Decks:
– Top Deck: Typically has larger openings to remove oversized particles.
– Bottom Deck: Finer mesh to classify smaller particles further.
– This setup allows for up to three product fractions (oversize, midsize, and fines).
2. Vibratory Mechanism:
– Uses eccentric weights, motors, or electromagnetic drives to generate vibrations.
– Ensures efficient material movement and prevents clogging (blinding).
3. Screen Media Options:
– Wire mesh, polyurethane panels, rubber screens, or perforated plates.
– Different aperture sizes for each deck depending on the application.
4. Applications:
– Mining & Aggregates (grading crushed stone, sand, gravel).
– Recycling (sorting waste materials like plastics, metals).
– Food Processing (sifting flour, sugar, grains).
– Chemical & Pharmaceutical (powder separation).
5. Advantages:
– Higher throughput compared to single-deck screens.
– Better classification efficiency with multiple fractions in one pass.
– Compact design saves space compared to two separate screens.
Common Types of Double Deck Vibratory Screens:
– Linear Motion Screens – Ideal for fine and dry materials.
– Circular Motion Screens – Best for heavy-duty applications like mining.
– Elliptical Motion Screens – Offers a balance between stratification and conveying speed.
Considerations When Choosing One:
– Material type (wet/dry, abrasive, sticky).
– Desired particle sizes for each fraction.
– Capacity requirements (tons per hour).
– Screen maintenance and wear resistance.
Would you like recommendations on specific brands or configurations based on your application?