Reference : An Experimental Approach to Link Powder Physical Properties to 3D Particle Shape
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Geological, petroleum & mining engineering
http://hdl.handle.net/2268/101118
An Experimental Approach to Link Powder Physical Properties to 3D Particle Shape
English
Califice, Arnaud [Université de Liège - ULg > Département Argenco : Secteur GeMMe > Géoressources minérales & Imagerie géologique >]
Lumay, Geoffroy mailto [Université de Liège - ULg > Département de physique > Physique statistique >]
Vandewalle, Nicolas mailto [Université de Liège - ULg > Département de physique > Physique statistique >]
Pirard, Eric mailto [Université de Liège - ULg > Département Argenco : Secteur GeMMe > Géoressources minérales & Imagerie géologique >]
Sep-2011
Particulate Systems Analysis 2011
Royal Society of Chemistry
No
No
International
London
Royaume Uni
Particulate Systems Analysis 2011
05-07 septembre 2011
Royal Society of Chemistry
Edinburgh
Royaume Uni
[en] particle shape ; flowability ; packing density ; 3D image analysis
[en] A series of samples have been characterized by 3D image analysis (using X-Ray microtomography). The samples consist of blends of metallic particles: steel shot abrasives (“balls”), steel fibres and angular steel grit particles. The blends were systematically prepared in different proportions of the raw products.
Various shape and size parameters were measured on the particles: equivalent volume diameter (dV), maximum inscribed sphere diameter (dIN), particle length (maximum Feret diameter), particle elongation (El), particle flatness (Fl) etc. The results are expressed as statistical shape and size parameters, expressed both as volume and number weighted distributions.
The blends have been tested for compaction using a cylindrical container which experiences a series of 500 free falls over a height of 3mm. The compaction dynamics was monitored using a sensor that measures the evolution of the solid volume fraction as a function of the tap number. From the obtained compaction curve, the Hausner ratio and a flowability index were extracted.
The same blends have also been analysed using a rotating drum at different rotation speeds to analyze the evolution of the flowing angle. As the system is based on the analysis of a time sequence of 50 images (separated by 0.5 sec) it is possible to measure the intermittent character of the powder flow. The resulting measure is a cohesive index of the powder.
The results obtained from physical testing were systematically plotted as a function of various statistical indices of the shape and size distributions in order to reveal correlations between particle shape properties and physical behaviour. Some clear trends appeared, demonstrating the influence of particle shape on powder physical properties.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/101118

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