Jaw crusher VS impact crusher | How to choose right rock crusher

Jaw crusher and impact crusher are two very important crushing equipment in the stone crushing plant. The obvious difference between jaw crusher and impact crusher is structure and working principle. Jaw crusher uses compressive force to break hard stone. The material is squeezed and crushed in the crushing chamber composed of movable jaw and fixed jaw. Impact crusher adopts the principle of impact crushing, the material is repeatedly impacted and crushed between the rotor (blow bar) and the impact plate. Now we focus on the analysis of their differences in actual production from 6 key points.

1. The scope of application is different

The jaw crusher can crush all kinds of soft and hard materials, and the compressive strength is between 300-350Mpa.
Impact crusher is suitable for crushing materials with low toughness and brittle materials with medium hardness and below, such as limestone, clay, calcium carbonate, gypsum etc. If it is hard, it will cause great damage to the wearing parts and shorten the service life.

2. Material particle size

In the stone crushing plant, jaw crushers are commonly used as primary crushing to crush large pieces of material, and it can allow ore below 1000mm to feed (depending on the equipment model and manufacturer). And impact crushers are commonly used for secondary or tertiary crushing equipment for medium or fine crushing. The allowable feed size range is not as wide as that of jaw crushers.

3. Different production capacity

In general, the capacity of jaw crusher is greater than that of impact crusher. Jaw crusher can reach 600-800t (depending on the manufacturer and product model), and the hourly output of impact crusher is about 260-450t.

4.Different output particle type

As a coarse crusher, the jaw crusher has a relatively large discharge fineness, generally below 300-350mm (depending on the manufacturer and product model), and the impact crusher is a medium or fine crusher, and its discharge fineness is of course smaller.

The particle shape of the material after extrusion treatment by jaw crusher is not ideal, and the content of needles is high. Impact crusher is a product with good particle shape and less edges and corners in the crushing equipment. It has a finer discharging particle size and its particle shape is also better than that of cone crusher.

Therefore, in actual production, the jaw crusher is usually equipped with an impact crusher for further shaping, and the two are also a common combination in the crushing production line.

5. Different prices  

Which is better, jaw crusher or impact crusher? According to the market sales situation, the overall sales of jaw crushers are more than impact crusher, mainly due to its versatility and flexibility. It can not only be used as a crushing equipment alone, but also can combine with other machines in various production lines. It is a cost-effective one among all crushing equipment.

The price of a jaw crusher generally ranges from tens of thousands to hundreds of thousands (Chinese RMB). The specific price can be consulted by the manufacturer.

The jaw crusher mentioned in this article is mainly coarse jaw crusher. For fine jaw crusher, it is mainly used as intermediate crushing equipment together with cone crusher, impact crusher, hammer crusher, etc. Therefore, there will also be a jaw crusher followed by a jaw crusher ( PEX fine jaw crusher) configuration. To sum up, when choosing crushing equipment, users should configure it reasonably according to production requirements in order to obtain ideal production capacity and benefits.

People Frequently Asked Questions-FAQ:

1.What are the disadvantages of impact crushers?

Impact crushers typically require more maintenance than compression style crushers – especially if crushing hard and abrasive materials. This is because the material in an impact crusher is constantly colliding within the crusher at high velocities to break the rock apart.

2.What crusher is best for concrete?

In our professional opinion, an impact crusher is the best choice for most concrete, or asphalt recycling applications. It mainly uses impact force to break stone into smaller size. Although jaw crushers do a dependable job. Jaw crusher capacities vary depending on the make and the model being used. Another disadvantage of jaw crushers is that the resulting particle sizes can sometimes be a little uneven.

3.What is a impact crusher used for?

The impact crusher is commonly used for the crushing of limestone, coal, calcium carbide, quartz, dolomite, iron pyrites, gypsum, and chemical raw materials of medium hardness.