A double-deck screen, also known as a double-deck vibrating screen, is a piece of equipment used in the mineral processing and aggregate industries to separate and size particles or materials into different grades or fractions. The working principle of a double-deck screen involves the use of multiple decks, each with different-sized screens, to efficiently separate the material into two or more fractions based on their particle size.
The working principle of a double-deck screen
Material Feeding
The material to be screened is fed onto the top deck of the double-deck screen. This can be done using a conveyor belt, a chute, or other feeding mechanisms.
Screening Surfaces
A double-deck screen consists of two decks or levels, each with a different-sized screen opening. The top deck usually has larger openings or mesh size, while the bottom deck has smaller openings.
Vibrating Motion
The screen decks are mounted on a frame and are vibrated using a motor or vibrating mechanism. This vibration causes the material to move and spread across the surface of each deck.
Particle Separation
As the material spreads across the top deck, particles that are smaller than the openings in the top deck pass through and fall onto the bottom deck. The larger particles that cannot pass through the openings in the top deck continue moving towards the end of the screen.
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