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application of grinding in coal beneficiation

application of grinding in coal beneficiation

Aug 01 1998 · The Hardgrove grindability index HGI is a widely used coalquality parameter with applications in coal mining beneficiation and utilization An understanding of the petrology of the coal is fundamental to understanding the validity of the HGI in the given application The HGI varies with coal rank increasing greater ease of grinding with increasing rank through the highvolatile

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