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Air Classifier Mill

Hywell machinery Air classifier Mill is an air classifying mill with integrated grinding, classifying, conveying, and collecting operations for achieving ultra-fine grinding (up to 2 micron) depending upon the nature of the product.


Operating in the medium to fine particle size reduction range the deliverys guaranteed, accurate particle size because of the highly efficient, variable speed dynamic integral air classifier and achieves a steep particle size distribution with minimum ultra fines.


This type of mill operates on the principle of impact grinding and employs high rotor speeds with a striking edge velocity of up to 120 m/s. Size reduction takes place by the impact of material particles on the rotating grinding surfaces (hammers or pins) and on the fixed liner or grinding track. Designed with an integral classifier, particle size, distribution and cut point can be accurately controlled by variable classifier speed.

  • WF
  • 8437800000
  • SUS304/SUS316L/Titanium
  • Food/Pharmaceutical/Chemical

Air Classifier Mill Principles

Air classifier mill material would be conveyed by feeding system evenly to milling chamber, and would be impacted by highspeed rotating beater, and also under the centrifugal force, it would impact the grinding track. By several different pulverization powers, the material would be milled into fine powder. The milled powder would go with air flow up to the classifying chamber. With the help of adjustable classifier wheel or inverter, coarse powder and fine powder would be separated. Qualified fine powder would go through the wheel vane then into the cyclone separator or dust collector, while mixture of coarse powder and fine powder would fall down to the milling chamber to be milled again.

Air Classifier Mill Specifications







Capacity   (kg/h)






Input   materials size (mm)






Output   materials Fineness  (mesh)






Weight   (Kg)






1.Hywell machinery reserves the right to the design without notice

2.All specifications of air classifier mill are as accurate as is reasonably possible, but they are not   binding.

Air Classifier Pulverizer Construction Material

Hywell Machinery are able to offer our WF Series Air classifier pulverizer with contact part to be built in SS304, SS316L, Titanium, Duplex stainless steel, etc. Electrical parts of control system of the Powder Air classifier pulverizers can be adapted to the customer’s needs.

How Does the Air Classifier Crusher Work?

The Air Classifier crusher is a vertical grinding mill incorporating an internal air classifying wheel with an independent drive.

Product is fed into the grinding chamber of the Air Classifier crusher by either a feed screw or a pneumatic conveying system via a rotary feed valve.

The product is impacted by the high speed grinding media, which causes the feed product to fracture and be thrown by the centrifugal force to the wall of the grinding chamber, which in turn, causes the product to fracture further.  The fractured particles are entrained in the induced airflow liberating the outside wall of the internal baffle assembly, which is fitted with air baffles to laminar the air flow.  The laminar airflow and particles pass to the internal classifier, which is rotating, in the same direction as the rotor disc.  Oversized particles rejected by the centrifugal force applied by the classifying wheel are thrown to the inner wall of the baffle and move down by gravity and by the pressure created by the classifier.  These oversized particles are then re-entrained into the grinding zone where further impact occurs.

The material to be grinded is conveyed from the hopper to the grinding chamber by the variable feed screw mechanism. The grinding occurs when the product meets a pin or bar type rotor disc. As particles are reduced in size they are entrained by the Air stream which enters below the rotor and are carried up between the inner wall and shroud ring with baffles, the particles are then deflected by an air dispersion ring to the separator assembly. Acceptable product is drawn through the exhaust and is collected by a high efficiency bag filter. Oversize particles are carried downward by internal circulating air stream and return to Rotor for additional grinding.

Supper Fine Crusher Advantages

Hywell machinery supper fine crusher had the following advantages over conventional solutions.

1.Fineness Powder

Supper fine crusher milling and classifying in one system. Required product size achieved by the adjustment of classifier wheel.

2.    Compact structure of air classifying mill

Air classifying mill have small space occupation, low installation power, wide application, and high performance cost.

3.    High milling efficiency constructure of air classifying mill

Air classifying mill have different beater designs, pin shape, hammer shape and tooth shape, for different materials..

4.    Electrical component

It mainly use international brand such as ABB ,Siemens or Schneider.

Air Classifying Mill Application:

Hywell machinery Air Classifihing Mills are supplied for either batch process or for continuous operation.  They are utilized in industries that produce fine powders where control of the particle size distribution is required.  Typical applications are; Chemical, Minerals, Pharmaceuticals, Food, Powder Coatings, etc.  All systems are designed to handle both inert and explosive applications where venting or containment is required.

Air Classifer Crusher Operation Video

Air Classifier Mill For Rice


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