Crushing operation has single stage or multiple stage. People use a single stage in a crushing line, but not a lot. For example, some of cement company produce production that only use hammer break machine or impact crusher to crush limestone, due to the small input material which has already crushed. Quarry Stone Crushing MachinesMost of production line is multiple stages, the main and common production line is use two or three stages.
People can use two stages crushing in a production line, if the raw material is less contained silicon. For example, in a common limestone production line, we can choose jaw crusher、impact crusher and vibrating screen to complete production line, due to the secondary crushing equipment is impact crusher, it has medium crush or fineness crush ability, also to shape material in the same time.
If it is hard stone, like granite or basalt material with high silicon. We can use jaw crusher、 cone crusher、 impact crusher(or sand making machine) and vibrating screen in production line. The secondary stage we choose cone crusher have following considerations:
First, material hardness is high, it will consume the spare parts easily, raw mill in cement plantbut cone crusher is pressed crushing, less consumption in the all crushing equipment.Second, cone crusher is continuous operation, good ability to crush hard stone, and also has less electricity consumption in the same capacity.
Multiple stages crushing is common, and how to choose the secondary crushing equipment is the most important. If use a right machine, the production line will more effective and spend less money. In fact, two stages of crush is enough for low hardness materials, people can choose more suitable machine