... dam to wash, classifying and dewatering various sands. This sand washer adopt inclination of 15°, under the water tub, three ... sediment pool, this machine are three functions of washing, dewatering, and classifying. Sand Washer Working Principle: The electric motor runs slowly with ... impellor, and grinds each other. The impurity covering the sand is washing away. At the same time, add more water, the ...