27/11/2010 · 27/11/2010 · There is a particular method to separate sand and gravel that requires some basic improvised tools and equipment. Since gravel is a lot coarser and larger than sand, separating it is not overly complied. You do not need any elaborate equipment to separate sand from gravel or to separate the large stones out of gravel, especially if you are not dealing with vast amounts.
And the sand we get through this is called system sand. System sand is used to fill the whole flask in the mechanical foundries where machine moulding is employed. The mould made with this sand has high strength, permeability and refractoriness. 8. Core Sand. The sand which is used to make core is called core sand. It is also called as oil sand.