Blade Mills

McLanahan Blade Mills

High-Shear Scrubbing and Slurry Conditioning for Mineral Processing

McLanahan Blade Mills are heavy-duty scrubbing machines designed to break down and disperse clay, dirt and other unwanted materials from mineral and aggregate feed.

The high-shear action of the rotating blades provides intensive particle-to-particle scrubbing and helps convert difficult, clay-bound feed materials into a manageable slurry for downstream washing and classification.

Blade Mills are particularly effective for applications where material contains significant amounts of clay or other contaminants that need to be dispersed and removed before further processing.

How McLanahan Blade Mills Work

Feed material and water are introduced into the Blade Mill.

Inside the machine, rotating blades aggressively mix, shear and scrub the material.

The blades create intense agitation that breaks down clay lumps and disperses clay and other unwanted materials throughout the water.

As the material is processed, the combination of mechanical action and water helps separate the undesirable fines and contaminants from the coarser mineral particles.

The resulting slurry can then be discharged for further washing, screening, classification or mineral processing.

The process can be summarized as:

Feeding + High-Shear Scrubbing + Clay Dispersion + Slurry Conditioning

High-Shear Scrubbing Action

The rotating blades provide a high-energy scrubbing action that helps break apart compacted and clay-bound material.

Unlike simple washing systems, Blade Mills are designed to provide intensive mechanical agitation and shearing.

This action is particularly useful when clay is tightly bound to the feed material or when the feed contains hard clay lumps that need to be broken down.

Clay Dispersion

One of the primary applications of Blade Mills is the breakdown and dispersion of clay.

Clay can coat valuable mineral particles, bind aggregate together and interfere with screening and classification.

The high-shear action of the blades helps break down clay masses and disperse the clay into the water.

The dispersed clay and fine particles can then be removed through downstream washing and classification equipment.

Slurry Conditioning

Blade Mills can be used as a conditioning stage to prepare material for downstream processing.

By breaking down clay and mixing the feed with water, the machine helps produce a more uniform slurry.

This can improve the performance of subsequent equipment such as:

Screens
Hydrocyclones
Classifiers
Sand processing equipment
Gravity separation equipment
Magnetic separators
Other mineral processing systems

Material Preparation

Blade Mills are especially useful where the feed material contains a combination of coarse particles, clay and water.

The intensive mixing action helps separate the components and prepare the material for the next processing stage.

Depending on the application, a Blade Mill may be installed upstream of a washing and classification circuit.

Applications

McLanahan Blade Mills are suitable for applications including:

Mining
Mineral processing
Aggregate washing
Clay removal
Ore washing
Sand and gravel processing
Industrial minerals
Material conditioning
Slurry preparation
Washing and classification

Typical applications may include materials containing:

Clay-bound aggregates
Clay-contaminated minerals
Sand and gravel
Crushed stone
Industrial minerals
Mineral ores
Other difficult-to-wash materials

Key Features & Benefits

High-shear scrubbing action
Intensive mechanical agitation
Effective breakdown of clay lumps
Helps disperse clay into the wash water
Helps separate clay and unwanted fines
Conditions material into a slurry
Improves feed preparation for downstream equipment
Suitable for clay-bound and difficult-to-wash materials
Continuous processing
Heavy-duty construction
Suitable for mining and aggregate applications
Can be integrated into complete washing and classification plants

Factors Affecting Blade Mill Performance

Actual capacity and performance depend on several factors, including:

Feed rate
Feed particle size
Material type
Bulk density
Clay content
Clay characteristics
Material hardness
Material abrasiveness
Moisture content
Water addition
Slurry concentration
Blade speed
Blade configuration
Retention time
Required degree of clay dispersion
Downstream process requirements

Proper equipment sizing and process design are important to achieve the required scrubbing and slurry conditioning performance.

Selecting the Right Blade Mill

The appropriate Blade Mill should be selected based on:

Material type
Required capacity (TPH)
Maximum feed size
Feed gradation
Bulk density
Clay content
Type and characteristics of the clay
Material abrasiveness
Water availability
Required slurry concentration
Required degree of scrubbing
Downstream washing and classification equipment
Overall process flowsheet

Testing may be recommended for applications where clay characteristics or the required degree of dispersion need to be established.

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