why need we use linear dewatering screen to wash sand stone?

Some customers consulted us about linear dewatering screen. They always ask some questions, for example why need we use linear dewatering screen to wash sand stone? So what is the reason?

Now sand and stones that are used in construction field is generally made by people or river sand. However, they are filled of impurities. There are some strict standard about construction sand. So we need to use dewatering screen to process these sand and stones in order to meet the standard. Dewatering screen has many types. One of that is linear dewatering screen.