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On the gas dispersion measurements in the collection zone of flotation columns

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Title: On the gas dispersion measurements in the collection zone of flotation columns
Authors: Matiolo, E., Testa, F., Yianatos, J. juan.yianatos@usm.cl, Rubio, J.
Source: International Journal of Mineral Processing. May2011, Vol. 99 Issue 1-4, p78-83. 6p.
Subjects: Flotation, Gas dynamics, Dispersion (Chemistry), Bubbles, Image analysis, Mathematical models of hydrodynamics, Interfaces (Physical sciences), Energy dissipation
Abstract: Abstract: This work shows the results of gas dispersion parameters in a fully controlled laboratory column flotation cell, namely gas hold-up (εg), superficial gas velocity (Jg) and bubble size distribution, measured directly by image analyses using the LTM-BSizer. Gas hold-up and bubble size (and their distribution) were found to be strongly dependent on Dowfroth 250 concentration and superficial gas velocity. A fairly linear relationship between experimental εg and bubble superficial area flux (Sb) was established, and results are compared to those calculated using drift flux analysis. Data obtained are discussed in terms of solution, hydrodynamics and interfacial phenomena. Possible implications on the role of the frother in the energy dissipation in bubble generation and on interfacial tensions are explored. [Copyright &y& Elsevier]
Copyright of International Journal of Mineral Processing is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 60665458
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: On the gas dispersion measurements in the collection zone of flotation columns
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  Data: <searchLink fieldCode="AR" term="%22Matiolo%2C+E%2E%22">Matiolo, E.</searchLink><br /><searchLink fieldCode="AR" term="%22Testa%2C+F%2E%22">Testa, F.</searchLink><br /><searchLink fieldCode="AR" term="%22Yianatos%2C+J%2E%22">Yianatos, J.</searchLink><i> juan.yianatos@usm.cl</i><br /><searchLink fieldCode="AR" term="%22Rubio%2C+J%2E%22">Rubio, J.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Mineral+Processing%22">International Journal of Mineral Processing</searchLink>. May2011, Vol. 99 Issue 1-4, p78-83. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Flotation%22">Flotation</searchLink><br /><searchLink fieldCode="DE" term="%22Gas+dynamics%22">Gas dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Dispersion+%28Chemistry%29%22">Dispersion (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Bubbles%22">Bubbles</searchLink><br /><searchLink fieldCode="DE" term="%22Image+analysis%22">Image analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Mathematical+models+of+hydrodynamics%22">Mathematical models of hydrodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Interfaces+%28Physical+sciences%29%22">Interfaces (Physical sciences)</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+dissipation%22">Energy dissipation</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: This work shows the results of gas dispersion parameters in a fully controlled laboratory column flotation cell, namely gas hold-up (εg), superficial gas velocity (Jg) and bubble size distribution, measured directly by image analyses using the LTM-BSizer. Gas hold-up and bubble size (and their distribution) were found to be strongly dependent on Dowfroth 250 concentration and superficial gas velocity. A fairly linear relationship between experimental εg and bubble superficial area flux (Sb) was established, and results are compared to those calculated using drift flux analysis. Data obtained are discussed in terms of solution, hydrodynamics and interfacial phenomena. Possible implications on the role of the frother in the energy dissipation in bubble generation and on interfacial tensions are explored. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Mineral Processing is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.1016/j.minpro.2011.03.002
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      – Code: eng
        Text: English
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        PageCount: 6
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    Subjects:
      – SubjectFull: Flotation
        Type: general
      – SubjectFull: Gas dynamics
        Type: general
      – SubjectFull: Dispersion (Chemistry)
        Type: general
      – SubjectFull: Bubbles
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      – SubjectFull: Image analysis
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      – SubjectFull: Mathematical models of hydrodynamics
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      – SubjectFull: Interfaces (Physical sciences)
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      – SubjectFull: Energy dissipation
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              Text: May2011
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