Attrition Scrubbing Cells

McLanahan Attrition Scrubbing Cells

Effective Particle Cleaning and Surface Preparation for Mineral Processing

McLanahan Attrition Scrubbing Cells are mineral processing equipment designed to clean and condition particles through intense particle-to-particle contact.

Attrition scrubbing uses the natural abrasive action between particles to remove unwanted coatings, clay, dirt, oxides and other surface contaminants from the material.

This process helps expose clean mineral surfaces and prepare the material for downstream processing and separation.

Attrition Scrubbing Cells are particularly useful when valuable minerals are coated with fine clay, dirt or other materials that can interfere with subsequent processing stages.

How McLanahan Attrition Scrubbing Cells Work

Feed material and water are introduced into the scrubbing cell.

The cell creates an intense scrubbing environment that promotes particle-to-particle contact.

As particles move and collide with each other, surface coatings and unwanted materials are loosened and removed.

Water helps carry the liberated clay, fines and contaminants away from the cleaned particles.

The scrubbed material can then be discharged for further processing, such as classification, screening, gravity separation, magnetic separation, flotation or other mineral recovery processes.

The process can be summarized as:

Washing + Attrition + Surface Cleaning + Mineral Conditioning

Particle-to-Particle Attrition

The key principle behind attrition scrubbing is friction between individual particles.

Instead of relying only on mechanical contact with a rotating component, the process promotes interaction between the particles themselves.

This intense particle-to-particle action can break down and remove coatings that are tightly attached to the surface of the mineral particles.

The process is particularly effective for materials containing:

Clay coatings
Dirt
Oxides
Soft coatings
Surface contamination
Fine adhering particles

Removing Clay and Surface Contamination

Clay and other fine materials can coat valuable mineral particles and interfere with downstream separation.

Attrition scrubbing helps remove these coatings and liberate the mineral surfaces.

This can improve the effectiveness of subsequent processing stages by providing cleaner and better-conditioned particles.

Mineral Conditioning

Attrition scrubbing can also serve as a conditioning stage before downstream mineral processing.

After scrubbing, the material may be easier to classify, screen or separate because unwanted surface coatings have been removed.

Depending on the application, the scrubbed material can be directed to:

Hydrocyclones
Screens
Classifiers
Gravity separators
Magnetic separators
Flotation circuits
Other mineral processing equipment

Water and Slurry Processing

Water is an important part of the attrition scrubbing process.

The feed material is mixed with water to create a slurry, allowing the particles to move and interact effectively.

The water also assists in transporting liberated clay, fines and other contaminants away from the cleaned mineral particles.

The required water addition depends on the material characteristics and process requirements.

Applications

McLanahan Attrition Scrubbing Cells are suitable for applications including:

Mineral processing
Ore washing
Clay removal
Surface cleaning
Mineral liberation
Feed preparation
Sand processing
Silica sand processing
Glass sand preparation
Industrial minerals
Aggregate washing
Other applications requiring particle surface cleaning

Typical materials may include:

Silica sand
Industrial minerals
Mineral ores
Sand
Aggregates
Clay-coated minerals
Other materials requiring surface cleaning

Key Features & Benefits

Intense particle-to-particle scrubbing
Effective removal of clay and surface coatings
Cleans mineral particle surfaces
Helps improve mineral liberation
Conditions material for downstream processing
Can improve subsequent classification and separation
Uses water to assist contaminant removal
Suitable for slurry-based processing
Suitable for a wide range of mineral applications
Can be integrated into complete washing and mineral processing plants
Robust design for demanding applications
Continuous processing capability

Factors Affecting Attrition Scrubbing Performance

Actual scrubbing performance depends on several factors, including:

Material type
Feed particle size
Clay content
Type and strength of surface coatings
Material hardness
Feed concentration
Slurry density
Water addition
Retention time
Scrubbing intensity
Feed rate
Cell configuration
Downstream process requirements

Proper evaluation of the feed material is important to determine the appropriate scrubbing conditions.

Selecting the Right Attrition Scrubbing Cell

The appropriate Attrition Scrubbing Cell configuration should be selected based on:

Material type
Required capacity (TPH)
Feed particle size
Bulk density
Clay content
Surface contamination
Required degree of cleaning
Slurry density
Water availability
Required retention time
Downstream equipment
Overall process flowsheet

Laboratory or pilot testing may be recommended for applications where the required level of cleaning or mineral liberation needs to be established.

Cube Solutions can evaluate your application requirements and assist in selecting the appropriate McLanahan Attrition Scrubbing Cell configuration.