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nip angle in double roll coal crusher egypt crusher

Dec 01 2012 Crushing tests were conducted using a pilotscale doubleroll crusher with a diameter of 350 mm a length of 150 mm and rolls with reticulated surfaces The crusher was operated at 20 RPM The coal samples in four different size classes 530 375 mm 375 265 mm 132 952 mm and 67 475 mm were prepared using 2 US standard

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