In order to separate silica sand, gravel and other dirty mud, LZZG XS sand washing machine comes to market. Its high processing capacity, perfect working performance, long life service, less replace part and simple install & maintenance make it as the main washing machine for silica sand. Search LZZG or Lynette Pang on Youtube, you can see its working videos, also other our sand processing machines working site. see product details: http://www.hiwtc.com/products/xs-sand-washing-dewatering-machine-8985-1102590.htm