What kind of rock to produce high-quality sand

Each device has to distinguish between good and bad, like on our rock crusher sand industry, there are many types of rock, rock hardness each has a different kind of metal which contain minerals taken is different, so in order from rocky selected one of the best stones to break is not easy.Not to say that high hardness rock sand can be used as a raw material to break  آلة الجزائر محطم الصانع , according to the situation we want to use to select the kind of rock is good, if it is used in the sand road we need to use pebbles to sand, pebbles system mechanism of sand out of the finished sand hardness relatively good, very good bonding effect, wear and buy extrusion, etc., with these characteristics in order to become a good helper of our road construction. If sand is needed to build a house, we can choose the mountain bluestone, bluestone hardness, though not high, but it has the toughness to make in the course of construction can withstand different wind and seismic forces.There are many types of sand, different areas of the kind is different, we need to according to our specific use to select a different mechanism sand.