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HERO ID
2583770
Reference Type
Journal Article
Title
Characterization of powder flow: Static and dynamic testing
Author(s)
Krantz, M; Zhang, Hui; Zhu, J
Year
2009
Is Peer Reviewed?
1
Journal
Powder Technology
ISSN:
0032-5910
Volume
194
Issue
3
Page Numbers
239-245
DOI
10.1016/j.powtec.2009.05.001
Web of Science Id
WOS:000267842700011
Abstract
Many characterization techniques are available to determine the flow properties of powders; however, it is debated which method(s) are the most appropriate. In this study, sample fine powders with a medium particle size between 22 and 31 mu m were characterized using a variety of techniques that tested powders under different stress states, ranging from static to dynamic. It was found that characterization techniques that were more dynamic such as fluidized bed expansion were best suited for predicting the fluidization performance while characterization techniques that were more static such as cohesion were better for predicting agglomeration. It was also found that results from static and dynamic characterization do not necessarily agree, where fine powders that showed good fluidization performance also displayed increased agglomeration, and vice versa. This suggests that flow properties are dependent upon the stress state and that no single technique is suitable for the full characterization of a powder. In other words. both static and dynamic characterization techniques must be employed to completely understand the flow properties of a powder and predict how it will behave under different process conditions. (C) 2009 Elsevier B.V. All rights reserved.
Keywords
Powder characterization; Particulate processes; Powder technology; Fluidization; Agglomeration
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