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Coal Gangue
Feb 11, 2019
Coal gangue is the solid waste discharged in the process of coal mining and coal washing. The main components of gangue are Al2O3 and SiO2. In addition, gangue also contains Fe2O3, CaO, MgO, Na2O, K2O, P2O5, SO3 and trace rare elements (gallium, vanadium, titanium and cobalt) in varying quantities. Coal gangue includes gangue from tunneling, gangue from roof, floor and interlayer and gangue from coal washing.
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