Segregation during feed bulk handling: How fines can quickly increase from 20% to more than 50%

Pellet Quality Matters - no. 7

Dear  ,

Fines will always be present in pelleted feed, but their degree of acceptance varies by market — e.g., dairy pellets intended for use in robotic feeders should be virtually free of fines, while the integrated poultry industry is more tolerant.

Still, almost everyone would be upset to find that their feed sample contained more than 50% fines. This not only creates physical problems, but there is potential for nutrient segregation and a loss of animal performance.

Segregation during bulk handling

Kansas State University researchers conducted an extensive study to understand where fines are generated in the feed mill. They found that  fines increased from 9% off the pellet mill to 14% after the fat coater and then to 20% going into the bulk truck (De Jong, et. al., 2015)Pelleting Aids - Segregation during bulk transport.png

Twenty percent fines is maybe not so bad, but if this is true, why do unhappy sales people keep showing up at the mill office with plastic bags full of feed that is mostly fines?

The white paper ’Segregation during bulk transport’ examines how feed containing 20% fines might look as it moves through the transport system - and shows how fines can quickly increase from 20% to more than 50%!

Get your free white paper here »


 Video: Segregation in bulk silos

Photo for newsletter 7.png

In this video you can see how small particles stay where they land and fill the voids between larger particles while pellets flow easily to the outsides of the silo.  When the contents of the bin discharge the column directly above the outlet flows downward and thereafter material from the top of the silo moves downward into this discharging column.  These two principals combine to cause segregation of fines during bulk transport creating concentrated pockets that are mostly fines..

View video here »   

 Borregaard LignoTech is the world's leading supplier of pellet binders and die lubricants to the animal feed industry. Our products can improve pellet quality, reduce energy consumption, increase production rate and improve overall feedmill profitability.

For more information about our pelleting aids Ameri-Bond 2X, LignoBond DD and PellTech please contact us or visit our website:

Share this newsletter:

Borregaard LignoTech   Po Box 162     1701  Sarpsborg     Norway

You receive this Newsletter as an existing or potential user of Borregaard LignoTech's pelleting aids. If you do not wish to receive future Newsletters from us, click on the link below.

Click here to Unsubscribe, or update your email settings here.