Fundamental studies of granule consolidation. Part 2: Quantifying the effects of particle and binder properties

Iveson, S. M. and Litster, J. D. (1998) Fundamental studies of granule consolidation. Part 2: Quantifying the effects of particle and binder properties. Powder Technology, 99 3: 243-250. doi:10.1016/S0032-5910(98)00116-8


Author Iveson, S. M.
Litster, J. D.
Title Fundamental studies of granule consolidation. Part 2: Quantifying the effects of particle and binder properties
Journal name Powder Technology   Check publisher's open access policy
ISSN 0032-5910
Publication date 1998-10-01
Sub-type Article (original research)
DOI 10.1016/S0032-5910(98)00116-8
Open Access Status Not yet assessed
Volume 99
Issue 3
Start page 243
End page 250
Total pages 8
Publisher Elsevier Science S.A.
Language eng
Subject 1500 Chemical Engineering
Abstract Glass ballotini of surface mean size 10, 19 and 37 μm were granulated in a 30 cm diameter tumbling drum. Water, glycerol and surfactant solutions used to vary the viscosity and surface tension of the binder liquid. The change of porosity with time was found to be well by a simple, empirical, exponential decay equation: ε-ε(min)/ε-ε(min) = exp(-kN) where ε is the average granule porosity after N drum revolutions, ε is the initial average porosity of the feed, ε(min) is the minimum porosity reached by the tumbling granules and k is the consolidation rate constant. ε(min) and k were complex functions of binder and solid properties - decreasing particle size and increasing liquid viscosity both reduced k; decreasing surface tension increased ε(min) and the effect of binder content on ε(min) varied with binder viscosity. Where possible, these relationships were expressed quantitatively and compared with consolidation models in the literature. k was also related to the previously measured dynamic yield stress of the granules. The results show that capillary, viscous and friction forces all play a role in granule consolidation.
Keyword Agglomeration
Capillary forces
Consolidation
Dynamic yield stress
Granulation
Impact deformation
Inter-particle friction
Viscous dissipation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
Versions
Version Filter Type
Citation counts: Scopus Citation Count Cited 88 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Fri, 05 Jan 2018, 06:19:35 EST