Coarse Grinding in Stirred Mills

Cervellin, Andrew (2003). Coarse Grinding in Stirred Mills Honours Thesis, School of Engineering, The University of Queensland.

       
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Author Cervellin, Andrew
Thesis Title Coarse Grinding in Stirred Mills
School, Centre or Institute School of Engineering
Institution The University of Queensland
Publication date 2003
Thesis type Honours Thesis
Supervisor Alex Jankovic
Frank Shi
Total pages 92
Language eng
Subjects 091405 Mining Engineering
Formatted abstract
Stirred Mills are predominately used in industry for regrind, fine and ultra-fine grinding applications, as they have been proven to have superior performance compared to traditional tumbling mills. Stirred mills are more efficient, due to a very high number of stress events per unit time and unit volume, at the appropriate stress intensity, compared to a ball mill. Secondary grinding duties are predominantly performed by ball mills and have been virtually unchallenged in this role for many years. Research suggests stirred mills may also be more efficient for coarse grinding applications than ball mills, however there is yet to be supporting experimental evidence published.

This thesis investigated stirred mill performance as compared to ball mill performance for coarse grinding applications. Based on indications in literature the following hypothesis was formed;

“Stirred Mills may be used in secondary grinding applications with better performance than Ball Mills”.

A locked cycle test procedure similar to that used for Bond Ball Mill Work Index determination was developed for the stirred mill to simulate a mill operating with a recirculating load of 250%. Three ore samples were investigated in the comparison. The feed material to both mills was the same.

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Keyword Stirred Mills

Document type: Thesis
Collection: UQ Theses (non-RHD) - UQ staff and students only
 
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Created: Mon, 12 Jan 2015, 14:43:26 EST by Asma Asrar Qureshi on behalf of Scholarly Communication and Digitisation Service