Bio-Industrial Opportunities: Dry Fractionation

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Facilities & Equipment: Dry Fractionation
Dry fractionation is a process in which a raw material is separated into the many components that form the whole, original material. Materials are processed in a dried state and do not require the use of a solvent. Processing technologies associated with dry fractionation include, but are not limited to, milling, sieving and air classification.

(Click on the image to enlarge the equipment photo.)

Hosokawa Milling and Air Classifying System
  • It provides size reduction capabilities (2 separate grinding technologies —Mikro ACM and wide-chamber pin mill) and air classification for separation of fine and coarse fractions.
  • Processing capabilities varies from 100 - 1000 kg/hr depending on the feedstock, milling process and desired product.
  • The air classification set up feeds material into an air stream that passes through the classifying wheel in centripetal direction which extracts the fines and conveys them to the fines discharge.
      • The coarse material rejected by the classifying wheel exits the machine through the coarse discharge. As it exists, the coarse discharge the material is rinsed again intensively by air to remove the remaining fines.
      • This results in an extremely clean coarse fraction. The product fineness is controlled as a function of the classifying wheel speed.
  • Smaller milling equipment is also available, roller, hammer and knife mills in the range from lab scale batch to 25 kg/hr.
  • Primary feedstocks that we are currently working with are grains, pulses, agricultural fibers and other dried process side stream materials.

Hammer Mill (Mikro ACM)
  • The characteristic feature is that grinding and classifying process happen synergistically.
  • By adjusting both the speed of the classifier and the rotor, precise control can be maintained on the resultant particle size distribution.

Wide-Chamber Pin Mill
  • Enables ultra-fine grinding of difficult products.
  • The large machine housing in comparison to the pin discs allows continuous milling of greasy, heat-sensitive and sticky materials without them clumping and depositing in the chamber.
  • The speed and rotation direction of the pin disks can also be set at various parameters.

Buhler Automatic (Flour) Mill MLU-202
  • Throughput: 10 - 12kg/hr

Retsch Ultra Centrifugal Mill ZM 200
  • Feed material: soft, medium-hard, brittle, fibrous
  • Size reduction principle: impact, shearing
  • Material feed size: < 10 mm
  • Final fineness: < 40 Ám
  • Capacity: 300 ml

VirTis Freeze Dryer
  • Can remove liquids from material without heat, which prevents potential damage from heat.
  • Freeze drying involves the removal of water or other solvent from a frozen product through sublimation, a process directly from the solid state to the gaseous state without passing through the liquid phase.
  • Freeze drying allows the preparation of a stable product that is easy to use and aesthetic in appearance. Properly freeze dried products do not need refrigeration and can be stored at ambient temperatures.
  • VirTis Freeze Dryer features:
      • 14 trays each 9.75" x 19.5" x 1.5"
      • can handle food grade samples
      • 50L condensing chamber
      • can remove up to 2.5 L of alcohol or similar low boiling point substance
      • programmable temperature profile
      • sample or shelf controllable temperature
      • can stopper samples under vacuum, if needed

Click to view more Dry Fractionation equipment

Alberta Agriculture & Forestry
Bio-Industrial Opportunities Section
O.S. Longman Building
4th Floor, 6909 - 116 Street
Edmonton Alberta T6H 4P2
Phone: (780) 644-8118

Bio Processing Innovation Centre - Grand Opening and Open House

September 21, 2017
1:00 - 3:30pm
5520 - 36 Street, Edmonton, AB

Click here to register.

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For more information about the content of this document, contact Victor Cheng.
This information published to the web on May 20, 2014.
Last Reviewed/Revised on May 28, 2015.