The status of artificial sand washing At present, most of the existing artificial sand production lines are utilizing wet production process. No matter what the type of sand washing machine is, the biggest drawback is that the fine sand( particle diameter is between 0.045mm and 1.6mm )will be in a serious loss and sometimes the loss will be over 20%. This drawback will not only reduce the output, but also affect sand gradation. For this reason, the gradation is not reasonable and fineness modulus is larger so that the product quality of mechanism sand will be largely reduced. Silty sand recovery system process program and main technical specifications Fine sand recovery system process program is used for solving the problems mentioned above.