LS series screw sand washer is the high-efficiency sand washing machine developed by us according to the users' feedback and foreign advanced technology, and it is normally used with sand making machine together. When working, the sand will grind one another driven by screw, remove the impurities wrapped the surface of sand, meanwhile, destroy the vapor layer wrapped with the sand, then the washing function completed in the powerful water flow. It is suitable for washing, grading and decontaminating several of fine and coarse material in metallurgy, material construction, and water and electricity industries. Especially it is suitable for building sand and road use.