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Hardgrove Grindability Index - Wikipedia. Hardgrove Grindability Index (short HGI) is a measure for the grindability of coal. Grindability is an index…

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Khoshjavan and co-worker lear.s evaluated the effect of coal chemical properties on the hardgrove grindability index[4]and coal swelling index[5]using artificial neural networks with only 300 datasets.Uludag studied the relationship between Wits-Ehac index and inherent coal properties for Witbank Coalfield using limited data[6]. ...

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