Effect of screen size and hammer speed on the particle size of three formulas produced on a industrial hammermill

While this grinding phase is energy-intensive (accounting for 20 – 25% of plant power consumption), it is a vital step in the subsequent production of high-quality pellets during the pelleting process. It is therefore useful to understand, know or even predict the particle size characteristics of ground products at the grinder output. The purpose of this study is to analyse the performance of an industrial hammermill when grinding complete formulas (Pre-dosing) for various animals (Sow, Finishing pig and Poultry) and, in a preliminary phase, to attempt to model the effect of screen size or hammer speed on feedstuff particle size. A second phase involved running tests to validate the models.