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Secondary ball mill

Feb 01, 2011 The secondary ball mill at Waterval UG2 Concentrator is normally operated at 30% ball filling and between 68% and 72% in-mill solids. In this study ball filling degrees of 25%, 30% and 33% and in-mill % solids of 65%, 68%, 72% and 75% were targeted – which resulted in 12 surveys. The other three surveys were all performed at 30% ball filling

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