A study of charge motion in rotary mills, with particular reference to the grinding action

 

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dc.contributor.advisor Nurick, Gerald N en_ZA
dc.contributor.author Powell, Malcolm S en_ZA
dc.date.accessioned 2014-11-15T19:40:40Z
dc.date.available 2014-11-15T19:40:40Z
dc.date.issued 1993 en_ZA
dc.identifier.citation Powell, M. 1993. A study of charge motion in rotary mills, with particular reference to the grinding action. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/9657
dc.description Includes bibliographical references. en_ZA
dc.description.abstract The objective of this study was to develop a fundamental understanding of the action of the grinding charge in a mill, and to then correlate this with the metallurgical performance of different mill-liners. To achieve these overall objectives it was first necessary to develop suitable experimental techniques, and the development of these techniques became a large part of the objective of the study. The motion of balls deep within the charge of a rotary grinding mill was investigated. Novel investigative techniques were used to track the motion of the balls, including X-ray filming at 50 frames per second of both the front and side views of a transparent mill, and gamma-camera filming of a radioactive ball. Analysis of the trajectories of the balls revealed several phenomena in the milling action that have not been reported until now. It was observed that the paths of the balls are smooth, that they spiral in and out of the charge, and that the grinding does not take place by rotary nipping of the ore between the balls. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Mechanical Engineering en_ZA
dc.title A study of charge motion in rotary mills, with particular reference to the grinding action en_ZA
dc.type Doctoral Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Engineering and the Built Environment
dc.publisher.department Department of Mechanical Engineering en_ZA
dc.type.qualificationlevel Doctoral
dc.type.qualificationname PhD en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Powell, M. S. (1993). <i>A study of charge motion in rotary mills, with particular reference to the grinding action</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering. Retrieved from http://hdl.handle.net/11427/9657 en_ZA
dc.identifier.chicagocitation Powell, Malcolm S. <i>"A study of charge motion in rotary mills, with particular reference to the grinding action."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1993. http://hdl.handle.net/11427/9657 en_ZA
dc.identifier.vancouvercitation Powell MS. A study of charge motion in rotary mills, with particular reference to the grinding action. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1993 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/9657 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Powell, Malcolm S AB - The objective of this study was to develop a fundamental understanding of the action of the grinding charge in a mill, and to then correlate this with the metallurgical performance of different mill-liners. To achieve these overall objectives it was first necessary to develop suitable experimental techniques, and the development of these techniques became a large part of the objective of the study. The motion of balls deep within the charge of a rotary grinding mill was investigated. Novel investigative techniques were used to track the motion of the balls, including X-ray filming at 50 frames per second of both the front and side views of a transparent mill, and gamma-camera filming of a radioactive ball. Analysis of the trajectories of the balls revealed several phenomena in the milling action that have not been reported until now. It was observed that the paths of the balls are smooth, that they spiral in and out of the charge, and that the grinding does not take place by rotary nipping of the ore between the balls. DA - 1993 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1993 T1 - A study of charge motion in rotary mills, with particular reference to the grinding action TI - A study of charge motion in rotary mills, with particular reference to the grinding action UR - http://hdl.handle.net/11427/9657 ER - en_ZA


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