The use of positron emission particle tracking for investigation of the media flow patterns in vertical stirred media mills

R. Tamblyn*, N. Rowson, R. Greenwood, X. Fan, K. Waters, J. Hart, D. Gittins, D. Skuse

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

Vertically stirred media mills are a highly effective low-footprint solution for the ultrafine grinding of industrial minerals. This work investigates the effect of media density on flow patterns within the mill. Direct irradiation of a media particle leads to decay through positron emission, consequently forming two anti-parallel gamma rays, which allow for the real time tracking of particle position. Grinding media of the same size, but with a range of specific gravities are followed using this method, and the effect on the flow within the mill is revealed. The technique is seen to be an effective method to highlight the velocity profiles within the mill, as well as the zones where grinding is less efficient - areas of relatively low velocity and high residence time. The changing media is seen to effect the overall flow patterns within the mill, having consequential effects on the efficiency of the grind.

Original languageEnglish
Title of host publicationSME Annual Meeting and Exhibit and CMA's 111th National Western Mining Conference 2009
Pages557-560
Number of pages4
Publication statusPublished - 26 Nov 2009
EventSME Annual Meeting and Exhibit and CMA's 111th National Western Mining Conference 2009 - Denver, CO, United States
Duration: 22 Feb 200925 Feb 2009

Publication series

NameSME Annual Meeting and Exhibit and CMA's 111th National Western Mining Conference 2009
Volume2

Conference

ConferenceSME Annual Meeting and Exhibit and CMA's 111th National Western Mining Conference 2009
Country/TerritoryUnited States
CityDenver, CO
Period22/02/0925/02/09

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