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new gangue coal mill in nguni

new gangue coal mill in nguni

Jul 15, 2010· 1. Introduction.Coal gangueis a complex industrial solid waste discharged whencoalis excavated and washed in the production course. Its major chemical composition is SiO 2 and Al 2 O 3, and its major mineralogical composition is quartz and feldspar .The amount ofcoal gangueaccumulated in China has already reached 3.8 billion tons; moreover, the stockpile ofgangueis increasing at a rate

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