Internal fibre length concentration in a pressure screen

Simple item page
dc.contributor.authorAtkins, Martin John
dc.contributor.authorWalmsley, Michael R.W.
dc.contributor.authorWeeds, Zuben
dc.date.accessioned2011-06-28T04:17:43Z
dc.date.available2011-06-28T04:17:43Z
dc.date.issued2007
dc.description.abstractLocalised axial consistency profiles within a pressure screen of a Pinus Radiata kraft pulp are reported. Axial Samples were also analysed using a Kajaani FS-200 to obtain fibre length distribution data. Localised consistency in the feed annulus was found to vary considerably and the consistency was found to be less than the feed consistency over some portions of the screen (annular dilution). Changes in consistency along the accept side was fairly constant although subtle changes were observed. Pulp passage ratios for both the bulk and individual fibre length fractions were calculated using the consistency profiles and fibre length data. In all cases fibre passage decreased along the screen length. Fibre passage was affected by a position effect which is comprised of two factors: flocculation effects, and flow and rotor effects. Fibre fractionation efficiency was found to increase along the length of the screen. Mechanisms that account for the observed annular dilution, passage ratio and efficiency changes are proposed. These involve flow of both fluid and fibre in the forward and reverse directions across the screen plate, increased flocculation in the feed annulus and the slip velocity between incoming pulp and the rotor tip.en_NZ
dc.format.mimetypeapplication/pdf
dc.identifier.citationAtkins, M.J., Walmsley, M.R.W. & Weeds, Z. (2007). Internal fibre length concentration in a pressure screen. Appita, 60(1), 41-47.en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/5428
dc.language.isoen
dc.relation.urihttp://www.appita.com.au/index.php?option=com_content&view=article&id=128&Itemid=185#backen_NZ
dc.rightsThis article has been published in the journal: Appita. Used with permission.en_NZ
dc.subjectpressure screeningen_NZ
dc.subjectfractionationen_NZ
dc.subjectfibre passageen_NZ
dc.subjectscreening mechanismsen_NZ
dc.titleInternal fibre length concentration in a pressure screenen_NZ
dc.typeJournal Articleen_NZ
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
internal fibre.pdf
Size:
298.93 KB
Format:
Adobe Portable Document Format
Description:
Thumbnail Image
Name: internal fibre.pdf
Size: 298.93 KB
Kind: Adobe PDF
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Name: license.txt
Size: 1.71 KB
Kind: License
Collections
Science and Engineering Papers