The spiral sand washer is a high efficient and multi-functional water washing equipment, which is composed of a spiral sand washing machine and a dewatering screen and hydrocyclones. Compared to the purchase price of equipment alone, the choice of spiral sand washing machine is undoubtedly more cost-effective. The spiral sand washing machine consists of spiral sand washing device, overflow device, water reverse device, separation and recovery device, water storage tank, slurry pump, elrctro motor, reducer and so on. Working principle When the washing system is working, the crushing and grading materials are firstly sent to the spiral washing device by belt conveyor, after grading and washing, the qualified material is sent into the dewatering unit, and the remaining waste water that after washing by the spiral sand washing device (containing a part of qualified material) is overflowing from the weir and get into water tank. The overflowed mud water is pumped into hydrocyclones by slurry pump, and the fine materials in mud are concentrated under the action of centrifugal force. Finally, the concentrated fine materials are sprayed on the dewatering unit and dewatering together with qualified materials. Features & Benefits 1. Compact structure, space saving. 2. The production range is large and can be customized. 3. High efficiency, more economical and practical.