Vibrating Screen Deck Area & Capacity Calculator

Q: Why is half-size percentage critical in screen sizing?

Particles smaller than half the screen aperture pass through almost instantaneously near the feed end. High half-size content dramatically increases screening efficiency and reduces required deck area.

Q: How does wet screening affect capacity?

High-pressure water spray bars (1–2 m³ water per ton of solids) wash fine clinging dust from coarse rock, increasing screening capacity by 25% to 50% on small apertures.

Q: What is bed depth limit on vibrating screen decks?

Screen bed depth should not exceed 4 times the aperture size for materials with bulk density ~1.6 t/m³, or 3 times aperture for heavy ores, to allow fine particles to stratify down to the mesh.

Calculate required vibrating screen deck area (m² and sq ft) using the standard Karra method across mineral, coal, and aggregate processing plants.

Feed Rate & Cut Size

Total Feed Rate to Deck (t/h):

Screen Aperture Cut Size (mm):

Oversize in Feed (% > cut):

Half-Size in Feed (% < 0.5×cut): Material passing 0.5 × aperture

Deck Position:

Screening Mode:

Required Screen Area

Required Net Area:

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Required Area (sq ft):

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Standard Commercial Size:

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Undersize Removal Flow:

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Frequently Asked Questions

Why is half-size percentage critical in screen sizing?

Particles smaller than half the screen aperture pass through almost instantaneously near the feed end. High half-size content dramatically increases screening efficiency and reduces required deck area.

How does wet screening affect capacity?

High-pressure water spray bars (1–2 m³ water per ton of solids) wash fine clinging dust from coarse rock, increasing screening capacity by 25% to 50% on small apertures.

What is bed depth limit on vibrating screen decks?

Screen bed depth should not exceed 4 times the aperture size for materials with bulk density ~1.6 t/m³, or 3 times aperture for heavy ores, to allow fine particles to stratify down to the mesh.