comminution

• The causes for the low concentrate contents which sometimes occur are: too wide a range of classification of the feed material for the wet mechanical sorting, too coarse comminution (liberation not yet attained) or very finely intergrown ores, for which the separation cut-off size in the fine-grain beneficiation is insufficient. —  Chapter 20
• Consequently, attempts to improve processing-plant throughput should be directed toward achieving a continuous mode of operation in which the entire raw-ore feed quantity undergoes comminution, sorting and classifying steps. —  Chapter 20
• Hence, it is absolutely necessary to ensure that comminution is performed so as to produce the smallest possible quantity of fines. —  Chapter 20
• In this case the comminution was extreme and accompanied by the usual long lateral fragments, one of which measured five inches in length and might well have extended into the knee-joint had that been an ordinary occurrence Perforations of the lower extremity of the bone were very common. —  Surgical Experiences in South Africa, 1899-1900 Being Mainly a Clinical Study of the Nature and Effects of Injuries Produced by Bullets of Small Calibre
• (i) Ore comminution (i.e. the crushing and grinding of rock) can be done in a simple crushers and ball mills. —  Chapter 11

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