Jaw crusher and impact crusher are common equipment used in aggregates industry. But a lot of people may not know them very well, especially for users starting in this field.
We often get asked this question, today we'll talk about the difference between these two crushers.
The obvious difference between jaw crusher and impact crusher is in structure and working principle.
The working mode of the former is flexural extrusion, and the material is crushed in crushing chamber composed of moving jaw and fixed jaw. The latter adopts the principle of impact crushing. The material is repeatedly smashed between the rotor (plate hammer) and the counter plate.
Many people should be familiar with the principle. So today we will focus on the analysis of their differences in actual production.
1. Different Scope of Application
1) Hardness of materials
Jaw crusher can crush materials with various harnesses, compressive strength between 300-350MPA. And the impact crusher is suitable for crushing low toughness, brittle material such as limestone. If we use impact crusher to process hard stone, it will cause great damage to the vulnerable parts and shorten the service life of crusher.
2) Material size
Generally, jaw crusher is more suitable for processing large stone materials, whose input size is no more than 1 meter (depending on the type of equipment and the manufacturer). So it’s widely used in mines and quarries. While impact crusher is usually used to crush small stone materials, and its input size is less than that of jaw crusher.
2. Different Applications
It is well known that in the production line of crushing, sand making and ore dressing, jaw crusher is used for coarse crushing as a primary crushing equipment (fine jaw crusher can be used for medium or fine crushing), while impact crusher is usually used for medium or fine crushing as a secondary or tertiary crushing equipment.
3. Different Capacity
The capacity of jaw fracture is greater than that of impact crusher. Generally speaking, the output of jaw break can reach 600-800T per hour (depending on the manufacturer and product model), and the output of impact crusher is about 260-450T per hour.
4. Different Fineness of Discharging
As coarse crushing equipment, the fineness of jaw crusher is large, generally below 300-350mm (depending on the manufacturer and product model). As a medium or fine crushing equipment, the discharge fineness of impact crusher is smaller.
Of course, it should be noted that due to different material properties, the discharging of different equipment may have errors.
5. Different Particle of Discharging
The grain shape of finished products of jaw crusher is not good with too much elongated and flaky particles. While the finished products of impact crusher has good grain shape, and its particle is better than cone crusher.
Therefore, jaw crusher is usually configured after the impact crusher for further shaping in the actual production. This is also more common collocation.
6. Different Prices
In general, the price of jaw crusher is lower than impact crusher, as a traditional crushing equipment, jaw crusher is more stable in some aspects like performance, quality, power consumption. This can meet the user's requirements, so this kind of cost-effective equipment is easier to attract the attention of users.