Transcription of TECHNICAL NOTES 8 GRINDING R. P. King - …
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TECHNICAL NOTES 8 GRINDING R. P. King - …
Copyright R P king 2000 TECHNICAL NOTES 8 GRINDINGR. P. King8-2&ROOLVLRQ5 ROOLQJZLWKQLSSLQJF igure Different types of GRINDING action by thegrinding P EOL QJ6 KRXOGHURIWKHORDG*UDYLWDWLRQDOIRUFH)6 WDJQDQ W]RQHJ&HQWULIXJDOIRUFH)FJ,PSDFW] RQH7 RHRIWK HOR DG&DWDUDFWLQJ)FRVF igure Media motion in the tumbling GRINDING actionIndustrial GRINDING machines used in the mineralprocessing industries are mostly of the tumbling milltype. These mills exist in a variety of types - rod, ball,pebble autogenous and semi-autogenous. The grindingaction is induced by relative motion between theparticles of media - the rods, balls or pebbles. Thismotion can be characterized as collision with breakageinduced primarily by impact or as rolling with breakageinduced primarily by crushing and attrition.
8-3 Centrifugal force outward Fc mp& 2 Dm 2 (8.1) & is the angular velocity, mp is the mass of any particle (media or charge) in the mill and Dm is the diameter of the mill ...
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