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Coal gangue
Coal gangue is a solid waste discharged during coal mining and washing processes. It is a black gray rock with lower carbon content and harder hardness than coal that accompanies the coal seam during the coal formation process.
Coal gangue is widely used in the fields of construction, chemical engineering, agriculture, and environmental protection, including manufacturing building materials, extracting chemical raw materials and fertilizers, serving as a soil amendment, and being used in environmental engineering such as wastewater treatment and flue gas desulfurization.
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