Gyratory Screen

Production Problems It Solves

Near-size particles entering the wrong grade

Horizontal motion spreads the feed and gives particles repeated contact with the mesh.

Fines reducing the consistency of bagged granules

Isolate fines and oversize from the accepted fraction, so each stream can be packaged or returned separately.

Where It Fits in Your Plant

Silica sand grading

Classify dry sand ahead of grade-specific storage or bagging, keeping mesh selection tied to the required particle distribution.

Fertilizer finishing

Screen dried and cooled granules before packing. Keep fines and large granules on separate rework routes; screening does not correct weak granules that break during later conveying.

How the Gyratory Screen Works

An eccentric drive produces horizontal gyratory movement in the screening box. The motion spreads the incoming feed over the mesh and advances it along the screening surface. Particles smaller than the selected openings pass through, while retained particles continue to their discharge. Deck support, screen cleaning and outlet sealing maintain the separation path.

Selection Factors

• Feed spread: distribute material across the inlet width before it reaches the screening decks.
• Near-size particles: mesh contact and residence time matter most when much of the feed is close to the cut size.
• Fraction isolation: deck seals and discharge channels must keep the separated streams apart.

Common Issues & Checks

• Reduced fine-product recovery: inspect blinded mesh and uneven bed depth across the deck.
• Oversize contamination: inspect mesh edges, damaged cloth and deck seals before adjusting the drive.