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Miracle
The GTS Series trommel screen is a rotating cylindrical drum classifier that separates crushed scrap or waste materials into two or three particle size fractions. In metal recycling lines, the trommel is typically positioned after the primary crusher or shredder to classify output before feeding downstream sorting equipment (ECS, magnetic separators, density separators) — ensuring each sorter receives material in its optimal particle size range for maximum separation efficiency.
Material is fed into the rotating drum at one end
As the drum rotates (8–18 RPM), material tumbles and rolls through the screen apertures
Small particles fall through the apertures early in the drum; larger material travels further before exiting at the drum discharge end
Dual-zone drums have two different aperture sizes in sequence, producing three output size fractions
Modular screen panel design: replace individual worn panels without removing the entire drum — dramatically lower maintenance cost versus solid drum competitors
Rubber-lined internal drum surface on feed end reduces wear on panel fasteners from coarse material impact
Anti-blinding screen surface treatment prevents soft or moist material from clogging apertures — critical for painted aluminum, oily metal chips, and damp ASR
Adjustable inclination angle (3–6°) controls material residence time and therefore separation sharpness
Variable drum speed (inverter-controlled) enables fine-tuning for different material bulk densities
Available in 4 standard lengths (1600 / 2400 / 3200 / 4800mm) for throughput scalability
Fully enclosed or open-frame construction options depending on dust control requirements
Crusher/Shredder → Trommel Screen → Fines fraction (ECS or direct output) + Coarse fraction (secondary crusher or direct baling)
Critical sizing consideration: For UBC recycling lines, a 30mm aperture trommel efficiently separates small aluminum chip fragments (through) from bale plastic/cardboard contamination (over) — a step that dramatically improves ECS performance downstream.