Aggregative Behavior of Cohesive Magnesium Carbonate Powders during Fluidization and Aerated Discharge
In this paper we studied the aerated discharge of two magnesium carbonate powders differing in their average diameter and particle size distribution. These samples were characterized by means of fluidization experiments and rheology shear test...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Hosokawa Powder Technology Foundation
2014-03-01
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| Series: | KONA Powder and Particle Journal |
| Online Access: | https://www.jstage.jst.go.jp/article/kona/21/0/21_2003009/_pdf/-char/en |
| _version_ | 1818621030446399488 |
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| author | Giorgio Donsì Giovanna Ferrari Massimo Poletto Paola Russo |
| author_facet | Giorgio Donsì Giovanna Ferrari Massimo Poletto Paola Russo |
| author_sort | Giorgio Donsì |
| collection | DOAJ |
| description | In this paper we studied the aerated discharge of two magnesium carbonate powders differing in their average diameter and particle size distribution. These samples were characterized by means of fluidization experiments and rheology shear tests carried out in a rotating shear cell. In the hopper discharge experiments, besides the discharge rates and the mass of residual solids as a function of the aeration rate, the aggregative behavior was observed by means of photographic techniques. Solids aggregates were actually visible within the aerated beds of solids during the fluidization experiments and in the streams of the discharging solids. Experimental data on the powder flow properties and on fluidization were analysed in order to permit evaluation of the aggregate diameters. These values compared fairly well with the aggregate diameters observed and made it possible to evaluate the voidage values outside the aggregates. These results were used in a modified form of the De Jong and Hoelen [9] equation to predict the solids discharge rate with a reasonable degree of accuracy. |
| first_indexed | 2024-12-16T18:02:47Z |
| format | Article |
| id | doaj.art-d28b5bff9942479cb1707f904389b5b7 |
| institution | Directory Open Access Journal |
| issn | 0288-4534 2187-5537 |
| language | English |
| last_indexed | 2024-12-16T18:02:47Z |
| publishDate | 2014-03-01 |
| publisher | Hosokawa Powder Technology Foundation |
| record_format | Article |
| series | KONA Powder and Particle Journal |
| spelling | doaj.art-d28b5bff9942479cb1707f904389b5b72022-12-21T22:22:01ZengHosokawa Powder Technology FoundationKONA Powder and Particle Journal0288-45342187-55372014-03-01210546510.14356/kona.2003009konaAggregative Behavior of Cohesive Magnesium Carbonate Powders during Fluidization and Aerated DischargeGiorgio Donsì0Giovanna Ferrari1Massimo Poletto2Paola Russo3Dipartimento di Ingegneria Chimica e Alimentare, Università degli Studi di SalernoDipartimento di Ingegneria Chimica e Alimentare, Università degli Studi di SalernoDipartimento di Ingegneria Chimica e Alimentare, Università degli Studi di SalernoDipartimento di Ingegneria Chimica e Alimentare, Università degli Studi di SalernoIn this paper we studied the aerated discharge of two magnesium carbonate powders differing in their average diameter and particle size distribution. These samples were characterized by means of fluidization experiments and rheology shear tests carried out in a rotating shear cell. In the hopper discharge experiments, besides the discharge rates and the mass of residual solids as a function of the aeration rate, the aggregative behavior was observed by means of photographic techniques. Solids aggregates were actually visible within the aerated beds of solids during the fluidization experiments and in the streams of the discharging solids. Experimental data on the powder flow properties and on fluidization were analysed in order to permit evaluation of the aggregate diameters. These values compared fairly well with the aggregate diameters observed and made it possible to evaluate the voidage values outside the aggregates. These results were used in a modified form of the De Jong and Hoelen [9] equation to predict the solids discharge rate with a reasonable degree of accuracy.https://www.jstage.jst.go.jp/article/kona/21/0/21_2003009/_pdf/-char/en |
| spellingShingle | Giorgio Donsì Giovanna Ferrari Massimo Poletto Paola Russo Aggregative Behavior of Cohesive Magnesium Carbonate Powders during Fluidization and Aerated Discharge KONA Powder and Particle Journal |
| title | Aggregative Behavior of Cohesive Magnesium Carbonate Powders during Fluidization and Aerated Discharge |
| title_full | Aggregative Behavior of Cohesive Magnesium Carbonate Powders during Fluidization and Aerated Discharge |
| title_fullStr | Aggregative Behavior of Cohesive Magnesium Carbonate Powders during Fluidization and Aerated Discharge |
| title_full_unstemmed | Aggregative Behavior of Cohesive Magnesium Carbonate Powders during Fluidization and Aerated Discharge |
| title_short | Aggregative Behavior of Cohesive Magnesium Carbonate Powders during Fluidization and Aerated Discharge |
| title_sort | aggregative behavior of cohesive magnesium carbonate powders during fluidization and aerated discharge |
| url | https://www.jstage.jst.go.jp/article/kona/21/0/21_2003009/_pdf/-char/en |
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