During the operation, the spiral sand washer rotates by the force of the spiral impeller, rotates the impeller and rolls the sand mechanism in the machine body, so that the mechanical sand is broken and milled, and the impurities covering the sandstone surface are eliminated. Destroy the water vapor layer of the coated sand to promote dehydration. At the same time, add water to form a strong water flow, remove foreign matter with less impurities and small specific gravity in time, and discharge from the overflow port to complete the cleaning work, and finally rinse the mechanical sand with water. The rotation of the helical impeller enters the discharge conduit.

The spiral sand washer has a central structure and the spiral blades are mounted on the central shaft. The power of the transmission rotates the central shaft to drive the rotation of the screw and the floating effect of the sand material on the first stage of the can and the screw. Dust and impurities are separated from the sand to achieve drainage and eliminate impurities. When the spiral sand washing machine is working in the field, the main body has an immersion angle, the feeding end is low, the discharge end is high, and the finished product is excluded from the high end.