Dust generation in powders: Effect of particle size distribution
1 Université de Technologie de Compiègne (UTC) – Sorbonne Universités, Laboratoire Transformations intègrèes de la matière renouvelable (TIMR), Rue Roger Couttolenc, CS 60319, 60203 Compiegne Cedex, France
2 Institut National de l’EnviRonnement Industriel et des RisqueS (INERIS), NOVA/CARA/DRC/INERIS, Parc Technologique Alata, BP2, F-60550 Verneuil-En-Halatte, France
* Corresponding author: firstname.lastname@example.org
Published online: 30 June 2017
This study explores the relationship between the bulk and grain-scale properties of powders and dust generation. A vortex shaker dustiness tester was used to evaluate 8 calcium carbonate test powders with median particle sizes ranging from 2μm to 136μm. Respirable aerosols released from the powder samples were characterised by their particle number and mass concentrations. All the powder samples were found to release respirable fractions of dust particles which end up decreasing with time. The variation of powder dustiness as a function of the particle size distribution was analysed for the powders, which were classified into three groups based on the fraction of particles within the respirable range. The trends we observe might be due to the interplay of several mechanisms like de-agglomeration and attrition and their relative importance.
© The Authors, published by EDP Sciences, 2017
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