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- W1994381572 abstract "• Pilot measurements of the slurry effect on power were compared to Morrell’s model. • In general, Morrell’s power model was found to under-predict the power measurements. • For low slurry fillings, measured net powers consistently increased with mill speed. • Although sensitive to the pool, Morrell’s model did not agree with the pilot data. • More tests are needed to enable a better analysis of the discrepancies observed. The pool of slurry is known to lower the power drawn to the mill. An attempt to ascertain this observation by relating load orientation to mill power for a range of speeds and slurry fillings was undertaken. To this end, a Platinum ore (−850 μm) was used to prepare a slurry at 65% solids concentration by mass. The Wits pilot mill (552 × 400 mm), initially loaded with 10 mm balls at 20% volumetric filling, was run at 5 different speeds between 65% and 85% of critical. The net power draw and media charge position were measured. After this, the slurried ore was gradually added to the media charge for slurry filling U between 0 and 3. A proximity probe and a conductivity sensor mounted on the mill shell provided a means of measuring both the position of the media charge and that of slurry. The data collected for the load behaviour and net power draw was later analysed. It was found that Morrell’s model could not fully explain the effect of slurry volume on net power draw especially for an under-filled media charge (i.e., for U < 1). The size of lifters and grinding balls used could be the reason for this. That is why a piece-wise function was curve-fitted to the power data to help make sense of the inconsistencies observed." @default.
- W1994381572 created "2016-06-24" @default.
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- W1994381572 date "2014-02-01" @default.
- W1994381572 modified "2023-09-29" @default.
- W1994381572 title "Effects of slurry filling and mill speed on the net power draw of a tumbling ball mill" @default.
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- W1994381572 doi "https://doi.org/10.1016/j.mineng.2013.10.028" @default.
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