The applications of nanoparticles or ultrafine glidant particles are increasing over the last years. In most of these industry applications the flow behavior of the particles is critical issue for the proper design of the processes and devices. Therefore, flowability tests including ratio ffc (consolidation stress to unconfined yield strength), bulk properties measurements and novel patented angle of repose Zenegero method were performed. The new method is based on a continuous flow of particles whose flow dynamics doesn’t affect with the fall of bulk material the target arrangement of material pile. Evaluation of pile angle is performed at 8 views rotated around the perimeter of the pile ensuring more accurate result. The most commonly used glidant such as Aerosil®, Cab-O-Sil® and magnesium stearate were taken for three type of flowability tests evaluation. In order to understand the nanoparticles flow behavior was also determined their particle size distribution, compressibility and cohesion. Initial results show that new Zenegero method gives more comprehensive flow information and good sensitivity. In addition, it was confirmed that the flowability of glidant with a narrow particle size distribution leads to good flow conditions. This study reveals how choice of flow characterization method can play a key role in multi-factorial determination of the glidant type.Keywords: Flowability, angle of repose measurement, glidant, bulk properties
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