When XSD Series sand washer works , the motor drives the impeller run slowly after being decelerated by v-belt, reducer and gear. The sand enters the wash trough through feeding tank, rolls pushed by the impeller, and rubs mutually to remove the impurities covering on the surface of the sand , at the same time , it breaks the water vapour which favors dewatering; At the same time, the strong water flow takes the impurities away, and discharged from the overfall . The clean sand is taken away by the impellers, when rising, the water drops down to the wash trough from the nets, this can both dewater the sand and save water. Finally, the sand is poured into the discharge chute and finished cleaning.