ORBi: Califice Arnaud - An Experimental Approach to Link Powder Physical Properties to 3D Particle Shape

Reference : An Experimental Approach to Link Powder Physical Properties to 3D Particle Shape


	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Engineering, computing & technology : Geological, petroleum & mining engineering
	To cite this reference:	http://hdl.handle.net/2268/101118

Title :	An Experimental Approach to Link Powder Physical Properties to 3D Particle Shape
Language :	English
Author, co-author :	Califice, Arnaud [Université de Liège - ULg > Département Argenco : Secteur GeMMe > Géoressources minérales & Imagerie géologique >]
	Lumay, Geoffroy [Université de Liège - ULg > Département de physique > Physique statistique >]
	Vandewalle, Nicolas [Université de Liège - ULg > Département de physique > Physique statistique >]
	Pirard, Eric [Université de Liège - ULg > Département Argenco : Secteur GeMMe > Géoressources minérales & Imagerie géologique >]
Publication date :	Sep-2011
Main document title :	Particulate Systems Analysis 2011
Publisher :	Royal Society of Chemistry
On invitation :	No
Audience :	International
City :	London
Country :	Royaume Uni
Event name :	Particulate Systems Analysis 2011
Event date :	05-07 septembre 2011
Event organizer :	Royal Society of Chemistry
Event place (city) :	Edinburgh
Event country :	Royaume Uni
Keywords :	[en] particle shape ; flowability ; packing density ; 3D image analysis
Abstract :	[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.
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/2268/101118

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