Mobile Gold Mining Equipment: Trommel Screen

A trommel screen is a rotating cylindrical drum that sorts material by particle size using gravity, water washing and screening. Feed enters the hopper, is pushed through the rotating drum by water showers, lighter fines and waste flow away while heavier gold-bearing particles remain on the collection mat or are directed to sluices for recovery.

It is primarily designed for alluvial and placer gold operations (small to medium scale). It can also be used for general waste separation and pre-screening of ore streams where gravity separation is appropriate. Hard-rock ore typically requires crushing before screening.

The design allows optional front stirring and a flushing device inside the drum to break up and wash away clay. These features can be added or adjusted on-site to reduce mud-related plugging and improve screening performance.

Key features include controlled particle-size screening, internal shower water washing, a tilted roller device that promotes material flow through the drum, an agitation/fixed chute to retain fine gold, and a robust collection mat/sluice system to capture high-density particles.

Yes. This mobile trommel is smaller than many traditional mobile screens and is designed for ease of transport and redeployment across various mining environments. It has an integrated frame and roller device to facilitate movement.

Capacity depends on drum size, mesh aperture and water flow. Small-to-medium mobile trommels commonly handle from about 1 up to 15 tonnes per hour. For example, the GMTS0519 model is typically used in the roughly 5–10 t/h range, but exact capacities vary by configuration.

Power requirements depend on motor size, pump capacity and optional accessories. Small mobile trommels commonly use single- to three-phase electric motors and small water pumps. Example model specifications (e.g., GMTS0519) list modest motor power—consult the supplier for exact kW requirements for your configuration.

Feed size must be compatible with the chosen screen aperture. Trommels work best when large boulders and oversized material are removed by pre-screening or primary crushing. Exact maximum feed size depends on drum diameter and mesh; consult specifications when selecting a model.

Yes. Trommel screens are often paired with sluice boxes, jigs, shaking tables, pumps, and classifiers as part of a complete gold recovery circuit to improve overall recovery and handle different size fractions.

Routine maintenance includes inspecting and replacing worn screen panels, checking seals and bearings, lubricating moving parts, ensuring the water spray and shower nozzles are clear, tightening fasteners, and monitoring motor and reducer performance. Regular cleaning prevents buildup and maintains separation efficiency.

Heavier gold particles are retained on the collection mat and directed to an agitation sluice or fixed chute for further concentration. Proper screen aperture selection, correct water pressure, adequate agitation and periodic inspection of the collection mat and sluice are essential to prevent loss of fine gold.

The unit features a durable motor, gearbox/reducer, roller device, sealed drum, replaceable screen panels, and a robust frame. These components are selected to withstand harsh mining conditions and minimize downtime.

Yes. Suppliers typically offer custom options such as different drum diameters and lengths, screen mesh sizes, additional agitation or flushing devices, altered tilt angles, and alternative power or mounting configurations to match ore characteristics and site logistics.

Install on stable, level ground with proper drainage. Ensure electrical connections meet local codes, protect moving parts with guards, provide safe access for operators, secure the unit during transport, and follow lockout/tagout procedures during maintenance. Training operators on safe handling and emergency procedures is recommended.

Most suppliers provide spare screen panels, bearings, seals, nozzles, and drive components, plus technical support for setup and troubleshooting. Warranty terms and after-sales packages vary by manufacturer—confirm availability of parts, lead times and service options before purchase.