Measuring powder flowability with a modified Warren Spring cohesion tester

The measurement of powder flowability is a major concern for most industrial processes that deal with the handling of bulk solids as raw materials, intermediates, or products. The development of devices that measure the flowability of non-aerated powders has not progressed as rapidly as might have b...

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Main Authors: Mohammed, S.A., Abdullah, E.C., Geldart, D., Abdul Raman, Abdul Aziz
Format: Article
Language:English
Published: 2011
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Online Access:http://eprints.um.edu.my/4425/1/Mohammed-2011-Measuring_powder_flo.pdf
http://eprints.um.edu.my/4425/
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spelling my.um.eprints.44252019-12-06T07:48:59Z http://eprints.um.edu.my/4425/ Measuring powder flowability with a modified Warren Spring cohesion tester Mohammed, S.A. Abdullah, E.C. Geldart, D. Abdul Raman, Abdul Aziz TA Engineering (General). Civil engineering (General) The measurement of powder flowability is a major concern for most industrial processes that deal with the handling of bulk solids as raw materials, intermediates, or products. The development of devices that measure the flowability of non-aerated powders has not progressed as rapidly as might have been hoped since most research activities have been based on various types of shear testers intended to aid the design of hoppers. A new flowability indicator named as weighted cohesion (WS) is established using newly improved version of direct cohesion texture. A cornerstone of the proposed technique is that the procedure is automated, using a digital Warren Spring tester called Warren Spring-University of Malaya cohesion tester (WSUMCT), thus making results operator-insensitive. Besides being a practical tool to diagnose the cohesion of experimental powders, the ratio between measured cohesion (using WSUMCT) and aerated density (using Hosokawa PT-S) provides us with a powerful technique to research fundamental particle internal cohesion forces directly and use these data to indicate the flowability. In this work, a series of fine (9.4 mu m) and coarse (60 mu m) porous silica gel particle mixtures, and mixtures of fine (28 mu m) and coarse (72 mu m) glass ballotini as well, were used as test powders. The results from these tests agree well with relative flowability determined on our newly driven indicator using WSUMCT. The validation of aerated weighted cohesion (WSA) as a flowability indicator was authenticated by comparing the conducted parameter with established measured Hausner ratio (HR) and angle of repose (AoR). (C) 2011 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved. 2011 Article PeerReviewed application/pdf en http://eprints.um.edu.my/4425/1/Mohammed-2011-Measuring_powder_flo.pdf Mohammed, S.A. and Abdullah, E.C. and Geldart, D. and Abdul Raman, Abdul Aziz (2011) Measuring powder flowability with a modified Warren Spring cohesion tester. Particuology, 9 (2). pp. 148-154. ISSN 1674-2001
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
language English
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Mohammed, S.A.
Abdullah, E.C.
Geldart, D.
Abdul Raman, Abdul Aziz
Measuring powder flowability with a modified Warren Spring cohesion tester
description The measurement of powder flowability is a major concern for most industrial processes that deal with the handling of bulk solids as raw materials, intermediates, or products. The development of devices that measure the flowability of non-aerated powders has not progressed as rapidly as might have been hoped since most research activities have been based on various types of shear testers intended to aid the design of hoppers. A new flowability indicator named as weighted cohesion (WS) is established using newly improved version of direct cohesion texture. A cornerstone of the proposed technique is that the procedure is automated, using a digital Warren Spring tester called Warren Spring-University of Malaya cohesion tester (WSUMCT), thus making results operator-insensitive. Besides being a practical tool to diagnose the cohesion of experimental powders, the ratio between measured cohesion (using WSUMCT) and aerated density (using Hosokawa PT-S) provides us with a powerful technique to research fundamental particle internal cohesion forces directly and use these data to indicate the flowability. In this work, a series of fine (9.4 mu m) and coarse (60 mu m) porous silica gel particle mixtures, and mixtures of fine (28 mu m) and coarse (72 mu m) glass ballotini as well, were used as test powders. The results from these tests agree well with relative flowability determined on our newly driven indicator using WSUMCT. The validation of aerated weighted cohesion (WSA) as a flowability indicator was authenticated by comparing the conducted parameter with established measured Hausner ratio (HR) and angle of repose (AoR). (C) 2011 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
format Article
author Mohammed, S.A.
Abdullah, E.C.
Geldart, D.
Abdul Raman, Abdul Aziz
author_facet Mohammed, S.A.
Abdullah, E.C.
Geldart, D.
Abdul Raman, Abdul Aziz
author_sort Mohammed, S.A.
title Measuring powder flowability with a modified Warren Spring cohesion tester
title_short Measuring powder flowability with a modified Warren Spring cohesion tester
title_full Measuring powder flowability with a modified Warren Spring cohesion tester
title_fullStr Measuring powder flowability with a modified Warren Spring cohesion tester
title_full_unstemmed Measuring powder flowability with a modified Warren Spring cohesion tester
title_sort measuring powder flowability with a modified warren spring cohesion tester
publishDate 2011
url http://eprints.um.edu.my/4425/1/Mohammed-2011-Measuring_powder_flo.pdf
http://eprints.um.edu.my/4425/
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