Dry Continuous Production Mills

How Continuous Dry Grinding Attritors Work

HSA-100 Attritor

Dry Grinding Attritors can be operated in Continuous or Batch operation. For a complete explanation of how Dry Grinding Attritors work in both Continuous and/or Batch operation, please download the Technical Paper “Attrition Dry Milling in Continuous and Batch Modes”.

HSA Series

The HSA High Speed Attritor is generally used in a continuous mode. The material is charged into the mill at the top and is discharged out the bottom side, making use of centrifugal force. The HSA is used when smaller particle size (generally 40 mesh) materials are fed into the machine and micron size end product is desired.

Also, it is often used for fibrous and polymer types of materials.

HSA Attritors feature a patented design concept that includes a unique grinding tank internal configuration which allows higher shaft speeds, finer grinding, and continuous operation with side discharge.

A series of specially shaped agitating arms and diverter discs are mounted along the longitudinal axis of the agitator shaft. This engineering design makes it possible to use smaller grinding media, operate at higher shaft RPM, and increase residence time of the material to be processed to insure a finer grind. 

HSA Series Features and Options:

  • Fully integrated system
  • Stainless steel grinding chamber
  • High speed, high volume production
  • Equipped with ammeter
  • Fully jacketed grinding tank temperature control
  • T. E.F. C. or explosion-proof electricals available
  • Efficient side discharge
  • Can be equipped with a metering pump for grinding aid
  • Exceptionally fine grinding

Common Applications for Attritors

  • Ceramic Powders
  • Glass frits
  • Metal powders
  • Mechanical alloying
  • Metal oxides
  • Fibers and cellulose
  • Food products
  • Ferrite
  • Pigments
  • Minerals
  • Coal and coke
  • Graphite
  • Plastics and rubbers
  • Chemicals

Engineering Data

Gross Tank Volume (gals)10.318.728.643.485.0
Media Volume* (gals)3.87.611.419.038.0
Height (H) 87″89″91″99″113″
Floor Space (W x D) 65″x32″73″x34″76″x35″91″x46″98″x50″
Discharge Height (X) 21″16″13″16″16″
Machine Weight (lbs)
w/o media 
Various types of ceramice linings are available for all models.
*For ceramic media, less horsepower is required.
Equipment can be built to CE specifications, if required.