Evaluating the influence of lifter face angle on the trajectory of particles in a tumbling mill using PEPT

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dc.contributor.advisorMainza, Aubreyen_ZA
dc.contributor.advisorGovender, Indresanen_ZA
dc.contributor.authorTakalimane, Motenaen_ZA
dc.date.accessioned2015-07-03T10:34:09Z
dc.date.available2015-07-03T10:34:09Z
dc.date.issued2014en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractThe work performed in this thesis was aimed at evaluating the influence of lifter face angle on the charge kinematics for a laboratory scale mill. The study involved tracking a single particle representing the ensemble using the Positron Emission Particle Tracking (PEPT) to obtain the location of the particle with time. The particle was radiated with a radionuclide; ⁶⁸8Ga, which has a half-life of 68 minutes. The objectives of the study involved tests with different lifter face angles at different mill speeds and volumetric mill filling. After performing the tests the data was analysed to obtain probability density distributions for each test conditions from key charge descriptors. Charge descriptors such as the Centre of Circulation (CoC), shoulder angle, toe angle, the free surface and also kinematic information such as the velocity profile along a carefully chosen radial line from the centre of the mill that passes through the CoC were obtained. The time averaged velocity data was used when assessing the influence of the lifter face angle on the velocity profile. The results showed notable effects of lifter face angle on charge characteristics. No real definitive trend was observed for the CoC as the lifter face angle was altered at all mill speed and filling conditions. However, the CoC showed an outward shift toward the mill shell with an increase in mill speed but an inward shift toward the mill centre with increase in charge filling degrees. Mill speed is expected to cause a load expansion as the charge approaches centrifugation.en_ZA
dc.identifier.apacitationTakalimane, M. (2014). <i>Evaluating the influence of lifter face angle on the trajectory of particles in a tumbling mill using PEPT</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/13374en_ZA
dc.identifier.chicagocitationTakalimane, Motena. <i>"Evaluating the influence of lifter face angle on the trajectory of particles in a tumbling mill using PEPT."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2014. http://hdl.handle.net/11427/13374en_ZA
dc.identifier.citationTakalimane, M. 2014. Evaluating the influence of lifter face angle on the trajectory of particles in a tumbling mill using PEPT. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Takalimane, Motena AB - The work performed in this thesis was aimed at evaluating the influence of lifter face angle on the charge kinematics for a laboratory scale mill. The study involved tracking a single particle representing the ensemble using the Positron Emission Particle Tracking (PEPT) to obtain the location of the particle with time. The particle was radiated with a radionuclide; &#8310;&#8312;8Ga, which has a half-life of 68 minutes. The objectives of the study involved tests with different lifter face angles at different mill speeds and volumetric mill filling. After performing the tests the data was analysed to obtain probability density distributions for each test conditions from key charge descriptors. Charge descriptors such as the Centre of Circulation (CoC), shoulder angle, toe angle, the free surface and also kinematic information such as the velocity profile along a carefully chosen radial line from the centre of the mill that passes through the CoC were obtained. The time averaged velocity data was used when assessing the influence of the lifter face angle on the velocity profile. The results showed notable effects of lifter face angle on charge characteristics. No real definitive trend was observed for the CoC as the lifter face angle was altered at all mill speed and filling conditions. However, the CoC showed an outward shift toward the mill shell with an increase in mill speed but an inward shift toward the mill centre with increase in charge filling degrees. Mill speed is expected to cause a load expansion as the charge approaches centrifugation. DA - 2014 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2014 T1 - Evaluating the influence of lifter face angle on the trajectory of particles in a tumbling mill using PEPT TI - Evaluating the influence of lifter face angle on the trajectory of particles in a tumbling mill using PEPT UR - http://hdl.handle.net/11427/13374 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/13374
dc.identifier.vancouvercitationTakalimane M. Evaluating the influence of lifter face angle on the trajectory of particles in a tumbling mill using PEPT. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2014 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/13374en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemical Engineeringen_ZA
dc.titleEvaluating the influence of lifter face angle on the trajectory of particles in a tumbling mill using PEPTen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScEngen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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