What crushers should be chosen for the sand making production line?

What crushers should be chosen for the sand making production line?
For one thing you need to describe the usage or the properties desired from the sand. Different crushing units will produce various outputs affecting the particle shape. The greatest factor is the cost, which includes the wear parts. So the hardness and bond index of the rock must be known. This will affect equipment selection based on the cost. A vertical shaft impactor may be more expensive to procure, but it will have less cost per ton on wear parts vs. a cone or roll crusher. If the material breaks up easilyn and is nonabrasive, then a cone may be more economical. A better question would be: What crusher for making sand used to ____ from a _____ rock with hardness ___ and bond index ____?