Industrial Particle Size Reduction Equipment for Dry Bulk Material Processing

Improve Particle Size Consistency | Increase Throughput | Reduce Downtime

We help identify and implement the right Prater Industries solution for particle size reduction, grinding, milling, lump breaking, air classification, and material feeding applications. From food ingredients and chemicals to minerals, plastics, grains, agricultural products, and other dry bulk materials, Prater equipment helps manufacturers improve product consistency, production efficiency, and overall process performance.

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Hammer Mills • Fine Grinders • Air Classifying Mills • Lump Breakers • Rotary Airlocks • Rotary Valves • Particle Size Reduction • Dry Bulk Material Processing

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Prater Air Classifier Mills

Grind fine powder and control the particle-size cut.

Discuss My Application Product Brochure PDF Product Details

Grind fine powder and control the particle-size cut.

Do you need fine grinding with an internal classification step?

Prater air classifying mills combine impact grinding with an internal air classifier. Coarse particles return to the grinding zone while suitably fine material leaves with the process air.

Typical application
Review a fine-powder application where the upper particle-size limit matters.

Also known as: Air classifying mills, ACMs, classifier mills.

What this equipment can help you do

Grinding and classification

Review both functions as part of one milling system.

Particle-size control

Define the desired distribution and oversize limit.

Application testing

Compare the result with your actual material and production goal.

How the process works

Grind the feed

Impact reduces the incoming particles.

Classify internally

Airflow and the classifier separate finer material from coarse particles.

Recirculate the coarse

Oversize returns for further grinding; fine product moves to collection.

Materials, industries & equipment choices

Grain & food ingredients

Bran, sugar, cocoa, and starch are application starting points. Define the fine-particle target and maximum oversize.

Chemicals & powders

Discuss powder coatings, resins, pigments, and suitable mineral powders. Material testing should establish the achievable distribution.

Configurations to compare

Pilot or production equipment, interchangeable grinding elements, optional screen-free design, and sanitary construction features.

Application video: faba bean protein enrichment

See how Prater combines an air classifying mill with a separate air classifier for faba bean processing. The milling stage prepares the powder; the downstream classifier performs the enrichment separation. This example shows why the complete process matters.

Watch on Prater’s YouTube channel

Prater application insight

Application example: controlling the grind of bran

Prater’s bran application story describes using the CLM to control the grind of fibrous cereal material. For a similar duty, define the incoming grain, desired texture, and upper particle-size limit. The schematic below shows the wider airflow and collection arrangement.

Prater CLM process schematic. This is a system diagram, not an installation photograph.

Source: Prater Industries. Read the bran grinding application PDF >>

Configuration & selection

Target distribution: Required fineness, oversize limit, and measurement method.
Material response: Moisture, heat sensitivity, stickiness, abrasion, and feed size.
Complete system: Airflow, collection, filter, feeder, and available utilities.

Options to discuss

Mill and classifier configuration
Feed control and airflow arrangement
Product collection and filtration
Cleaning and access requirements

Send a representative material description, feed and target particle-size distributions, required rate, and a process sketch. Include any cleaning or temperature limits.

Plan your application review

How is this different from a screen-based grinder?

An internal air classifier makes the particle-size cut while coarse material recirculates. Tell RTS the required distribution so we can compare this approach with screen-based grinding.

Can we review or test my material before selection?

Share the material, the current process, and measurable acceptance criteria. RTS can discuss the appropriate review and any testing requirements with Prater before a final recommendation.

What about dust collection and process integration?

Include the feeder, collection system, utilities, cleaning needs, and upstream and downstream equipment in the review. Final equipment and protection requirements depend on the complete application.