Pamp;Q University Lesson 9 Washing amp; Classifying : Pit amp; Quarry
Sep 10, 2015#0183;#32;Also, screening is impractical for aggregate smaller than No. 8 mesh, in which case, hydraulic separation, or classifying, becomes an important operation. Washing and classifying of aggregate can be considered in two parts, depending on the size range of material. Coarse material: Generally above 3/8 in. (sometimes split at 1/4 in. or #4 mesh).