mill for coal gangue 280

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Coal gangue, which has a similar composition to clay [], is a solid waste produced during coal mining and processing [6,7,8,9,10], and its annual production accounts for about 10% to 15% of the coal output in that year [6,7,11].Fresh undisturbed coal gangue does not have pozzolanic activity [], which in general leads to the low strength of coal gangue aggregate concrete and severely limits its ...

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