Hosokawa Powder Technology Foundation ANNUAL REPORT
Online ISSN : 2189-4663
ISSN-L : 2189-4663
Research Grant Report
Evaluation of Flowability and Floodability of Cohesive Powder using Powder Discharge by Additional Pressure
Koichiro OGATA
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RESEARCH REPORT / TECHNICAL REPORT FREE ACCESS

2016 Volume 24 Pages 24-29

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Abstract

This study has examined the evaluation of the cohesive powder flow using the test of powder discharge by the additional pressure of the air flow. As the experimental condition, three kinds of Calcium hydroxide was used and the interstitial air pressure and the initial void fraction were varied. According to the results of powder discharge, it could be obtained the following main result: (1) A state of powder flow could be classified to the dischargeable, the transient and the non dischargeable. (2) A cohesiveness of three kinds of Calcium hydroxide have revealed from the ration of estimated cohesive force to gravity force. (3) The difference in flowability of three powders could be indicated clearly from the relationship between the ration of estimated cohesive force to gravity force. As the result, the low flowability of powder was obtained when the ration of cohesive force to gravity force is large.

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https://creativecommons.org/licenses/by/2.1/jp/
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