Trommel Screen-Henan Keming Machinery Equipment Co., Ltd.

Classification

Classified by central shaft structure

Shafted drum sieves can screen granular, powdery and agglomerated lump materials. Shaftless drum sieves adopt a shaft-free design, suitable for screening easily entangled, large-volume and high-impact materials, with a 20% higher output compared with shafted models.

Classified by external structure

They can be divided into closed type and open type (cage drum sieve). Closed drum sieves keep the surrounding environment clean and protect screened materials from external environmental interference.

Drum-Trommel-Screen-Types

Working Principle

Inclined Rotation

The drum assembly is installed on the frame at an incline. The motor drives the drum to rotate around its axis through a reducer.

Material Tumbling

After materials enter from the feeding inlet, they continuously flip and roll with drum rotation, moving axially toward the lower end.

Classification & Discharge

Qualified materials smaller than the screen mesh openings (undersize materials) fall through the cylindrical screen and are discharged from the bottom outlet. Unqualified oversize materials larger than the openings keep moving and exit at the drum tail.

Anti-clogging Design

Flaps or cleaning devices are commonly fitted inside the drum. They tap the screen mesh during rotation to dislodge trapped particles and prevent screen blockage.

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Advantages

Anti-clogging Performance

Built-in cleaning beaters automatically remove trapped materials in screen holes. It works well for sticky and wet materials and cuts downtime for manual cleaning.

Wide Material Compatibility

Shafted trommel screens handle granular, powdery and agglomerated lumps; shaftless models are ideal for tangled, large-size and high-impact raw materials for diverse applications.

Smooth Operation & Low Noise

Low-speed drum rotation creates minimal vibration with stable load, requiring less foundation bearing capacity.

High Throughput Capacity

The shaftless trommel delivers around 20% higher output than equivalent shafted versions to support continuous high-volume production.

Optional Sealed Structure

Closed-type models prevent dust leakage, protecting the working environment and screened materials from external contamination.

Easy Maintenance

Simple mechanical structure facilitates disassembly, inspection and screen mesh replacement, lowering operation and maintenance costs.

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Applicable Industries

Applications

Sand & aggregate

Pre-screening and grading for river pebbles, manufactured sand, crushed stones, topsoil and earthwork materials.

Mining & coal

Pre-scalping, desliming and size classification for raw coal, gangue, limestone and various ores.

Solid waste recycling

Sorting construction & demolition waste, municipal solid waste and old landfill materials to recover recycled aggregates.

Compost & organic fertilizer

Separating mature compost, garden waste and organic fertilizer into fine fractions and oversized residues.

Chemical & metallurgy

Particle grading and fines removal for coke, sinter, slag and granular fertilizers.

Agriculture & landscaping

Screening humus soil, planting soil, wood chips, mulch and seed materials.

How to Choose the Right Product

Check material characteristics

For wet, sticky and fibrous materials, trommel screens are preferred. For fine-grained and dry materials, vibrating screens can be considered.

Check processing capacity

For low output (5–10 tons/hour), select models with a diameter of 0.8–1.2 m; for medium output (20–50 tons/hour), choose models with a diameter of 1.2–1.5 m; for high output (above 100 tons/hour), large-size models or two-stage screening solutions are required.

Check sieve mesh size

Determine according to finished particle size requirements. Select small apertures if materials below 5 mm are needed; match the aperture size based on debris dimensions for construction waste screening.

Check installation space

Take on-site feeding method, installation angle (generally 5°–16°) and connection with subsequent conveying equipment into consideration.

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Frequently Asked Questions

Q1:What materials can a trommel screen process?

It handles wet, sticky, fibrous materials, compost, organic fertilizer, sand, aggregates, coal, solid waste, construction waste and mineral materials.

Q2: Can you customize the trommel screen?

Yes. Drum diameter, length and mesh specifications can be customized according to your working conditions.

Q3: What is the installation angle range?

Normally 5° to 16°, adjustable based on material viscosity and processing requirements.

Q4: What are the advantages of trommel screen compared with vibrating screen?

It has large throughput and good adaptability for wet and sticky materials, not easy to block the screen.

Q5: How to prevent screen mesh blockage?

Equip with cleaning brushes or rubber hammers; reasonably select aperture and drum rotation speed.