McLanahan Rotary Trommels

McLanahan Rotary Trommels

Efficient Rotary Screening and Material Separation

McLanahan Rotary Trommels are rotating cylindrical screening machines designed to efficiently separate bulk materials according to particle size.

The rotating drum continuously lifts, tumbles and advances the material across the screening surface. Smaller particles pass through the openings in the screen, while larger particles remain inside the drum and continue toward the discharge end.

Rotary Trommels provide a simple and effective solution for continuous screening and sizing of a wide range of materials.

They can be used in mining, aggregates, mineral processing, recycling, composting and other bulk material handling applications.

How McLanahan Rotary Trommels Work

Material is introduced into one end of the rotating cylindrical drum.

As the drum rotates, lifters or the internal geometry of the drum raise and tumble the material, allowing it to move gradually toward the discharge end.

During this movement, particles smaller than the selected screen openings pass through the screening surface.

Larger particles remain inside the drum and continue toward the end of the machine where they are discharged separately.

This continuous process provides:

Feeding + Tumbling + Screening + Separation

in a single machine.

Efficient Particle Size Separation

The primary function of a Rotary Trommel is to separate material according to particle size.

As the material travels through the rotating drum:

• Fine material passes through the screen openings.

• Larger particles continue through the drum.

• Different screening sections can be used to produce multiple size fractions.

The screening opening size is selected according to the required product size and application.

Multi-Section Screening

Rotary Trommels can be configured with different screening sections along the length of the drum.

Each section can have a different opening size, allowing the machine to produce multiple size fractions from a single feed stream.

For example, a trommel can be configured to separate:

• Fine material

• Intermediate-size material

• Coarse material

• Oversize material

This makes Rotary Trommels suitable for applications requiring multiple product sizes.

Continuous Material Processing

The rotating action of the trommel provides continuous material movement through the machine.

The material is repeatedly lifted and tumbled as the drum rotates, increasing contact between the material and screening surface.

This promotes effective separation and allows the machine to process large quantities of bulk material continuously.

Screening of Difficult Materials

Rotary Trommels can be used for a variety of materials with different moisture, particle size and material characteristics.

The selection of screen media, drum configuration and operating parameters should be based on the specific application.

For wet, sticky or clay-rich materials, proper screen selection and trommel configuration are particularly important to maintain effective screening and minimize material build-up.

Screening Media

The trommel drum can be equipped with different types of screening media depending on the application.

Screen media selection is based on factors such as:

• Required separation size

• Feed size

• Material abrasiveness

• Moisture content

• Material characteristics

• Required capacity

• Product specifications

The correct screening media helps achieve the required separation performance and service life.

Applications

McLanahan Rotary Trommels are suitable for applications including:

• Mining

• Mineral processing

• Aggregate processing

• Quarrying

• Recycling

• Waste processing

• Compost screening

• Soil screening

• Sand and gravel processing

• Material classification

• Product sizing

• Bulk material screening

Typical materials may include:

• Aggregates

• Sand

• Gravel

• Soil

• Compost

• Organic materials

• Coal

• Minerals

• Recycled materials

• Waste streams

• Other bulk materials

Key Features & Benefits

• Continuous rotary screening

• Efficient particle size separation

• Rotating cylindrical screening drum

• Controlled material movement

• Multiple screening sections available

• Can produce multiple product sizes

• Suitable for a wide range of materials

• Suitable for bulk material processing

• Robust construction

• Continuous operation

• Flexible screening media options

• Suitable for mining, aggregate and recycling applications

• Can be integrated into complete processing plants

• Simple and effective screening principle

Factors Affecting Rotary Trommel Performance

Actual capacity and screening efficiency depend on several factors, including:

• Feed rate

• Feed size

• Feed gradation

• Bulk density

• Material moisture

• Material stickiness

• Clay content

• Material abrasiveness

• Screen opening size

• Screening media type

• Drum diameter

• Drum length

• Drum speed

• Drum inclination

• Internal lifter configuration

• Feed distribution

• Required separation size

Proper trommel sizing, screen media selection and operating conditions are essential for achieving the required capacity and screening efficiency.

Selecting the Right Rotary Trommel

The appropriate Rotary Trommel should be selected based on:

• Material type

• Maximum feed size

• Required capacity (TPH)

• Bulk density

• Feed gradation

• Moisture content

• Clay content

• Material abrasiveness

• Required cut sizes

• Number of product sizes

• Screening media

• Drum diameter and length

• Installation arrangement

• Downstream equipment requirements

Cube Solutions can evaluate your application requirements and assist in selecting the appropriate McLanahan Rotary Trommel configuration.

McLanahan Rotary Trommels from Cube Solutions

As a McLanahan agent, Cube Solutions provides screening, feeding, crushing and mineral processing solutions for customers in Egypt and the region.

Our services include equipment selection, application evaluation, technical support and supply of McLanahan equipment.

Contact Cube Solutions to discuss your Rotary Trommel application and determine the most suitable configuration for your operation.