Predict the grinding result achieved by size reduction equipment such as roller refiners and impact mills at varying operating parameters by developing a new predictive PBM model based on a distinction between machine and material function.

Specific objectives are:

1. Determination of stress energy and stress history from DEM (dry) and DEM-CFD (wet) modelling of milling;
2. Characterization of material- and breakage-functions for different particle size classes using a custom-built two-roller particle tester and micro compression experiments;
3. Coupling machine and material functions to develop a new predictive PBM model for milling.

Expected Results:

1. Literature study and existing model evaluation; choice of methods;
2. Determination of material- and breakage-functions for different particle size classes;
3. Predictive process models for roller refiners and impact mills using PBM up-scaling;
4. Validation of mill simulations with pilot-scale tests.