This document summarizes the key aspects of a sand plant operation. It discusses the sand making and screening machines that produce crushed sand as an alternative to river sand. These include VSI crushers and vibrating screens. The working process involves stone materials being crushed and screened into finished sand through a closed circuit. Produced sand is cleaner and of higher quality than river sand due to washing. Advantages of the sand plant include simple structure, portability, low noise and maintenance. Disadvantages are the sand can be coarser than natural sand. Common applications are in construction, railways, and tunnels. Proper installation and regular maintenance are required.