Silica sand washg plant is used to wash out dirt, ash from the sand. In this sand washg process, XSD series sand washg equipment are widely used, Its capacity varies from 20 t/h to 180 t/h. Silica Sand Processg Flow 1. In the silica powder makg process, Jaw Crusher is used as primary crushg mache, then go through the secondary crushg plant. 2.