Mobile Trommel Screen, Portable Gold Trommel Wash Plant
Mobile trommel screens, also known as portable trommel wash plants, are movable screening units used for placer gold processing. They are generally used to screen, wash, deslime, and remove unwanted gravel or debris from gold-bearing sand, river sand, and tailings before the material moves to the gold recovery stage. The material is fed into the hopper and enters the inclined rotating drum, where it is lifted, rolled, and washed as the drum turns. Fine material passes through the screen and discharges from the bottom outlet, while oversized gravel and impurities move to the drum tail and discharge separately. A typical mobile trommel wash plant includes the hopper, drum, base frame, tires, turntable, generator, water pump, drive system, control cabinet, and gold recovery sluice.
| Model | Drum Diameter (mm) | Drum Length (mm) | Screen Opening Size (mm) | Motor Power (kW) | Capacity (t/h) |
| 1200 | 3000 | 2-50 | 7.5 5.5 | 20-50 | |
| 1200 | 4500 | 11 5.5 | 50-80 | ||
| 1500 | 4800 | 15 11 | 80-120 | ||
| 1800 | 4800 | 18.5 11 | 120-180 | ||
| 2000 | 6000 | 22 15 | 180-300 | ||
| 2200 | 6000 | 30 15 | 300-400 | ||
| 3000 | 7500 | 55 11 11 | 400-500 |
Note:The trommel drum, screen openings, bar spacing, feed hopper, motor power, and water pump power can be customized according to the material type, required capacity, and washing or screening needs.
- Mobile gold trommel wash plants use a double-layer, shaftless drum design for placer gold screening and washing.
- The inner layer uses evenly arranged wear-resistant bars with a 20 mm gap, while the outer layer uses manganese wire mesh with 5 mm openings. After screening, the material is divided into three fractions: >20 mm, 5–20 mm, and <5 mm. Material smaller than 5 mm goes to the centrifugal concentrator, 5–20 mm material goes to the pulsating sluice, and material larger than 20 mm is discharged as tailings.
- A diesel generator set provides the power supply. The feed hopper is fitted with a bar grizzly to remove oversized pieces, while flushing pipes are installed at the hopper and along both sides of the outer screen mesh for washing during screening.
- The modular mobile design includes three sets of tires at the front, middle, and rear, along with four adjustable support legs for easier movement and stable setup on site.
- Supporting equipment for fine washing and gold recovery can also be supplied, including centrifugal concentrators, pulsating sluices, fixed sluice boxes, shaking tables, amalgamators, and mercury recovery units.