The prediction of the outermost trajectory of media in a grinding mill for lifter bars with rounded or worn profiles

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dc.contributor.advisorNurick, Gerald Nen_ZA
dc.contributor.authorMilner, Andrew Leighen_ZA
dc.date.accessioned2016-09-06T14:46:10Z
dc.date.available2016-09-06T14:46:10Z
dc.date.issued1997en_ZA
dc.description.abstractThis thesis presents the analysis of the path of a ball on the inside of a ball mill for lifter bars with rounded or worn profiles. The model predicts the response of a single ball with particular reference to the balls trajectory after departure from the lifter bar and incorporates the effect of friction, mill rotational speed, lifter height as well as different lifter bar profiles. The out of plane travel of the particles are ignored and hence the system is reduced to a two dimensional problem. A set of experiments were performed on a model perspex mill in order to obtain data by which the theory could be compared. The lifter bar is analysed using a parabolic expression which allows the shape to be changed to model various stages oflifter wear. Two possible formulations are investigated in determining the motion of the particle on the lifter bar. The first formulation assumes the ball to roll on the lifter bar until a limiting friction is reached after which the ball will slide along the lifter. The second formulation considers the ball to have a pure sliding motion on the lifter.en_ZA
dc.identifier.apacitationMilner, A. L. (1997). <i>The prediction of the outermost trajectory of media in a grinding mill for lifter bars with rounded or worn profiles</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering. Retrieved from http://hdl.handle.net/11427/21702en_ZA
dc.identifier.chicagocitationMilner, Andrew Leigh. <i>"The prediction of the outermost trajectory of media in a grinding mill for lifter bars with rounded or worn profiles."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1997. http://hdl.handle.net/11427/21702en_ZA
dc.identifier.citationMilner, A. 1997. The prediction of the outermost trajectory of media in a grinding mill for lifter bars with rounded or worn profiles. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Milner, Andrew Leigh AB - This thesis presents the analysis of the path of a ball on the inside of a ball mill for lifter bars with rounded or worn profiles. The model predicts the response of a single ball with particular reference to the balls trajectory after departure from the lifter bar and incorporates the effect of friction, mill rotational speed, lifter height as well as different lifter bar profiles. The out of plane travel of the particles are ignored and hence the system is reduced to a two dimensional problem. A set of experiments were performed on a model perspex mill in order to obtain data by which the theory could be compared. The lifter bar is analysed using a parabolic expression which allows the shape to be changed to model various stages oflifter wear. Two possible formulations are investigated in determining the motion of the particle on the lifter bar. The first formulation assumes the ball to roll on the lifter bar until a limiting friction is reached after which the ball will slide along the lifter. The second formulation considers the ball to have a pure sliding motion on the lifter. DA - 1997 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1997 T1 - The prediction of the outermost trajectory of media in a grinding mill for lifter bars with rounded or worn profiles TI - The prediction of the outermost trajectory of media in a grinding mill for lifter bars with rounded or worn profiles UR - http://hdl.handle.net/11427/21702 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21702
dc.identifier.vancouvercitationMilner AL. The prediction of the outermost trajectory of media in a grinding mill for lifter bars with rounded or worn profiles. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1997 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21702en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Mechanical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMechanical Engineeringen_ZA
dc.titleThe prediction of the outermost trajectory of media in a grinding mill for lifter bars with rounded or worn profilesen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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