There are many types of stones can be made into sand. Such as basalt, granite, limestone, marble, quartzite, sandstone, cobble stone, river stone etc. The first step is crush, it maybe through one or two steps for crushing, it’s depend on the materials.
The most important crusher in the crushing process is sand making machine. Stone less than 50mm enters sand making machine though conveyor belt. Stone is crushed by hitting other stones. Material falls down to impellor cavity. Under great centrifugal force, it hits material that coming downwards. After hitting each other, they force a vortex between impellor and shell, and hit each other several times, finally smaller stone comes out, and goes to vibrating screen, sand washing machine.
When the sand come out off the sand making machine, it’s goes to vibrating screen. The material drops down along the long line. In screen grading, the material is separated mechanically on screen plates. Overlarge material will go back to sand maker to be refreshed, Output sizes can be made according to customers’ requirement. After that the satisfactory material is transported to sand washing machine, Sand washing machine's electric motor and decelerator drives the impeller in the water groove to move like a circle. Then it mixes, overturns, cleans and discharges the sand or slag pellets in the water groove. Finally the sand or slag pellets are come out of sand washing machine. Then the final sand can be made according to customers’ requirement.