The composition of coal gangue is complex,and the physical and chemical properties of different coal gangues vary greatly.Scientific classification of coal gangue is conducive to the recycling and comprehensive utilization of coal gangue.By summarizing the common classification of coal gangue,a schematic diagram of the relationship between different types of coal gangue in the natural state is given,and the coal gangue classified according to mineral composition is summarized,further improving the classification of various types of coal gangue.
coalganguenatural existence status classificationmineral compositioncharacteristicsclassification