Screw classifier for silica screw classifier for silica are an effective way to wash, Dewater, Deslime and control the bottom conclusion of the gradation. A large pool area provides maximum retention of desirable while a, Product sizes rising current system floats off the excess fines . Advantages simple to operate limited maintenance Minimal energy usage features and benefits simple structure water saving no pollution Requires minimal upkeepdurability1. It is of the bearing, Simple structure device of impeller drive is separated from water and materials to avoid, With water in a large degree that the bearings are damaged by being soaked sand or, With water some polluted things. 2. When It is utilized for cleaning sand in quarries, It has many advantages compared with the traditional spiral one. 3. There is little loss for medium, Sized and fine sand and stone powder. The grade and the fineness of the sand for construction after being washed can be up to the national standards, Like fine grains of sand for construction and cobble and broken stones for construction .