Hosokawa Alpine AFG Air Jet Mill: Precision Jet Milling for Ultra-Fine Powder Production

The Hosokawa Alpine AFG Fluidised Bed Opposed Jet Mill is engineered for the efficient manufacturing of ultra-fine powders with a steep particle size distribution and precise top size limitation, achieving fineness levels below 5 µm up to 200 µm. This revolutionary milling technology has set a benchmark in the industry since its launch in 1981, with over 1,000 units sold for various applications.

Key Features
Fluidised Bed Design: Ensures cool and contamination-free grinding.
Jet Milling Principle: Comminution occurs through interparticle collisions within gas jets, eliminating machine wear and product contamination.
Laval Nozzles: Enables high exit velocities (up to 500 m/s) for effective particle size reduction.
Dynamic Classifier: The horizontal classifying wheel allows for precise control of particle size distribution.
Principle of Operation
The AFG uses compressed gas to convert thermal energy into kinetic energy, achieving supersonic speeds through specially designed Laval nozzles. The jet milling process draws material from a fluidised bed, ensuring high impact probabilities among particles and promoting effective comminution.

Advanced Features
Single/Multi-Wheel Classifier Heads: Flexibility in classifying options.
Monobloc Ceramic Classifying Wheels: Minimize wear when processing abrasive materials.
Robust Materials: Options for PU, ceramic, and special-grade steel linings, as well as stainless steel or mild steel construction.
Megajet Nozzles: Four nozzles create underpressure, enhancing product draw from the fluidised bed.
Explosion Pressure Resistance: Designed for safe operation under challenging conditions.
Pharmaceutical Design: Meets stringent requirements for bioavailability and minimal off-spec batches.
Hot-Gas Mode: Allows for cost-effective production of ultrafine mineral powders.

Applications
The AFG Jet Mill efficiently processes a wide range of challenging materials:
Heat-Sensitive Materials: Toner, resin, wax, and dyestuffs.
Abrasive Materials: Silicon carbide, corundum, and aluminum oxide.
High-Purity Products: Fluorescent powders, silica, and special metals.
Magnetic Materials: Rare earth compounds such as neodymium-iron-boron.
Mineral Raw Materials: Kaolin, graphite, and talc.
Composite Materials: Selectively ground metal alloys.

This versatile jet mill is designed to meet the demanding requirements of various industries, providing superior performance and high product purity in ultra-fine powder production.

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