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Sand Size Chart 30 60 Grinding Mill China

May 04 2018 The thickness of sand is divided into 4 levels on the basis of fineness modulus Coarse sand its fineness modulus is 3 7 3 1 the average particle size is over 0 5 mm Medium sand its fineness modulus is 3 0—2 3 the average particle size is 0 5—0 35 mm Fine sand its fineness modulus is 2 2—1 6 the average particle size is 0 35—0