Breakage behaviour of spherical granulates by compression

Publikationstyp
Conference Paper
Date Issued
2005-07
Sprache
English
Author(s)
Antonyuk, Sergiy  
Tomas, Jürgen  
Heinrich, Stefan  
Mörl, Lothar  
TORE-URI
http://hdl.handle.net/11420/14024
Journal
Chemical engineering science  
Volume
60
Issue
14
Start Page
4031
End Page
4044
Citation
Chemical Engineering Science 60 (14): 4031-4044 (2005-07)
Publisher DOI
10.1016/j.ces.2005.02.038
Scopus ID
2-s2.0-18644382391
This paper describes the deformation and breakage behaviour of granulates in single particle compression test. Three industrial spherical granulates - γ-Al2O3, the synthetic zeolite Köstrolith® and sodium benzoate (C6H5COONa) were used as model materials to study the mechanical behaviour from elastic to plastic range. The elastic compression behaviour of granulates is described by means of force-displacement curves, by application of Hertz-Huber contact theory and continuum mechanics. An elastic-plastic contact model was proposed to describe the deformation behaviour of elastic-plastic granules. The effects of granulate size and stressing velocity on the breakage force and contact stiffness during elastic and elastic-plastic displacement are examined. It is shown that the zeolite granulates with elastic-plastic behaviour have viscous properties as well. Breakage mechanisms of granulates during elastic, elastic-plastic and plastic deformation are also explained. The breakage probability is approximated by Weibull distribution function. The behaviour of the granulate during compression under the repeated loading-unloading conditions was investigated.
Subjects
Breakage probability
Compression test
Crushing mechanism
Elasticity
Force-displacement curve
Granulation