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LAPSE:2019.0522
Published Article
LAPSE:2019.0522
The Effect of the Presence of Very Cohesive Geldart C Ultra-Fine Particles on the Fluidization of Geldart A Fine Particle Beds
Abbas Kamranian Marnani, Andreas Bück, Sergiy Antonyuk, Berend van Wachem, Dominique Thévenin, Jürgen Tomas
April 15, 2019
The effect of the presence of ultra-fines (d < 10 μm) on the fluidization of a bed containing fine particles (d < 100 μm), is the subject of this paper. Practically, it can happen due to breakage or surface abrasion of the fine particles in some processes which totally changes the size distribution and also fluidization behaviour. The materials used in this study are both ground calcium carbonate (GCC); fine is CALCIT MVT 100 (Geldart’s group A) and ultra-fine is CALCIT MX 10 (group C). The experimental results for different binary mixtures of these materials (ultra-fines have 30%, 50%, or 68% of the total mixture weight) show that the physical properties of the mixtures are close to those of pure ultra-fine powders. Using mean values of the bed pressure drop calculated from several independent repetitions, the fluidization behaviour of different mixtures are compared and discussed. The fluidization behaviour of the mixtures is non-reproducible and includes cracking, channelling and agglomeration (like for pure ultra-fine powders). Increasing the portion of ultra-fine materials in the mixture causes a delay in starting partial fluidization, an increase in the bed pressure drop as well as a delay in reaching the peak point.
Keywords
agglomeration, binary mixtures, cohesion, fine particle, fluidization, ultra-fine powders
Subject
Suggested Citation
Kamranian Marnani A, Bück A, Antonyuk S, van Wachem B, Thévenin D, Tomas J. The Effect of the Presence of Very Cohesive Geldart C Ultra-Fine Particles on the Fluidization of Geldart A Fine Particle Beds. (2019). LAPSE:2019.0522
Author Affiliations
Kamranian Marnani A: Institute of Mechanical Process Engineering, Otto von Guericke University (OvGU), Universitätsplatz 2, 39106 Magdeburg, Germany
Bück A: Institute of Particle Technology (LFG), Friedrich-Alexander-University Erlangen-Nürnberg, Cauerstraße 4, 91058 Erlangen, Germany
Antonyuk S: Institute of Particle Process Engineering, Technische Universität Kaiserslautern, Gottlieb-Daimler Street, 67663 Kaiserslautern, Germany
van Wachem B: Institute of Mechanical Process Engineering, Otto von Guericke University (OvGU), Universitätsplatz 2, 39106 Magdeburg, Germany
Thévenin D: Institute of Fluid Dynamics and Thermodynamics, OvGU, Universitätsplatz 2, 39106 Magdeburg, Germany [ORCID]
Tomas J: Institute of Mechanical Process Engineering, Otto von Guericke University (OvGU), Universitätsplatz 2, 39106 Magdeburg, Germany
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Journal Name
Processes
Volume
7
Issue
1
Article Number
E35
Year
2019
Publication Date
2019-01-11
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr7010035, Publication Type: Journal Article
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Published Article

LAPSE:2019.0522
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doi:10.3390/pr7010035
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Apr 15, 2019
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CC BY 4.0
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Apr 15, 2019
 
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Apr 15, 2019
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Original Submitter
Calvin Tsay
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