Spiral Sand Washing Machine Spiral sand washing machine is a kind of sand washing machine. It is used with sand making machine and plays an important role in sand making plant. It mainly stirs the sand and gravel materials through the spiral blades, so that the mud and impurities are mixed with water to realize the cleaning and screening of sand and gravel materials. It can be made into single screw type and double screw type. Why choose spiral sand washing machine? Spiral sand washer is especially suitable for washing, grading and removing impurities of medium, fine and coarse-grained materials. It can effectively wash sand and gravel with serious mud impurities and strong washing capacity Due to the strong washing ability, it is commonly used in large sand production line.