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5th International Workshop - Advances in Cleaner Production Academic Work Minerals and major elements as fractions of whole-coal samples • When considered on a whole-coal basis, the average proportions of quartz, kaolinite, illite and bassanite + gypsum in the clean coals are between 55 and 80% of the average proportions of quartz, kaolinite, illite + and bassanite + gypsum in the clean coals are between 55 and 80% of the average proportions of the same minerals in the ROM samples.

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