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l gangue crusher

Coal Gangue 36.78 56.56 0.62 1.95 0.42 0.22 2.10 1.32 In the production process of coal gangue aggregate, the coal gangue was crushed by a jaw crusher, ground by a small ball mill and calcined in a mu e furnace at 700 C for 2 h (Figure1). Materials 2020, 13, x FOR PEER REVIEW 3 of 21

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