Rotormill

Features

• Eight models are available, ranging from 15 to 750 horsepower
  Long gap design eliminates the need for screens that can choke or wear
• Compact, heavy-duty construction with carbon or stainless steel fabrication
• No specialized foundation is needed
• Heavy-duty, top and bottom rotor bearings
  Dynamically balanced rotor
• Large access doors to the mill interior
• Hassle-free adjustment or replacement of internal parts
• Hardened grinder internals available for abrasive materials

 

Benefits

• Reduced cost and time of processing because several operations, such as de-agglomeration and surface coating, take place simultaneously

• It can be used with materials, such as abrasive products and less-friable materials, which may not be handled well by a fine grinder or classifying mill

• Continuous fine milling at high production rates

• Simultaneous coating and mixing during milling

• Fiber fluffing capability

   

Operational Theory

Particles are pulverized to small sizes by inter-particle collisions induced by very high turbulence within the mill. The pulverizing action is generated by an internal rotor that spins at high speeds. Heavy-duty bearings provide stability during the pulverization process. These bearings are housed outside the grinding chamber to prevent product contamination.

The rotor consists of two sections:

• A Lower Section that functions as a material distribution fan 
• An Upper Section, where the material is finely ground.

Grinding occurs at several stages within the upper section. A series of grinding plates accelerate the air and particles against the grooved lining on the interior of the Rotormill. Miniature pockets of highly rotating air are set up within the mill during operation. This high-velocity turbulence causes particle-to-particle collisions and pulverizes the material. Internal heat is absorbed by the continuous flow of air.

Because of the unique design, which allows for varying airflows, the adjusting of the grinding plates, and the type of grinding plates, a wide variety of materials and sizes can be accommodated and rapidly processed. Heat-sensitive materials can be milled without cryogenic processing.