Jaw Crusher VS Impact Crusher

Jaw crusher and impact crusher are the main crushing equipments in the ore crushing production line. Jaw crusher is mainly used for the process of high hardness materials, mainly for the coarse crushing of ore, while the impact crusher for the treatment of medium hardness and brittleness stones, mainly for the medium crushing and fine crushing of stones.

So what’s the difference between jaw crusher and impact crusher, jaw crusher vs impact crusher as bellow:

1. Different Structure

Jaw crusher is mainly composed of frame, eccentric wheel, flywheel, moving jaw, side guard plate, elbow back seat, reset spring, fixed jaw plate and movable jaw plate etc. The jaw crusher uses power to drive the jaw plate to move periodically to extrude the material to achieve the crushing effect.

Impact crusher is mainly composed of reaction liner, feed port, plate hammer, rotor frame etc. When the impact crusher is working, the plate hammers that distributed on the rotor according to different rules will hit the material on the reaction liner for crushing.

2. Different Uses

a. Jaw crusher is a primary crusher, which is the first equipment to crush the raw stone. It has simple and reasonable structure, high hardness of wear-resistant parts, and is suitable for the primary crushing of high hardness stone;

b. Impact crusher is a two-stage crushing equipment, which is the equipment for crushing the discharged material of jaw crusher again. It is not suitable for crushing high hardness stone such as granite and basalt, and has good crushing effect for brittle and soft stone.

3. Different Work Scope

Jaw crusher is mainly used for crushing all kinds of ores and bulk materials into medium particle size and crushing materials whose compressive strength ≤ 320Mpa. The feed size of jaw crusher is 125mm – 750mm, which is the preferred crushing equipment for primary crushing.

The feed size of the impact crusher ≤ 500mm and the compressive strength ≤ 350MPa. It is suitable for all kinds of coarse, medium and fine materials (granite, limestone, concrete, etc.). The discharge particle size can be adjusted and the crushing specifications are diversified.

4. Different Working Principle

a. When jaw crusher working, the motor drives the belt and pulley to move the moving jaw up and down through the eccentric shaft. When the moving jaw rises, the angle between the elbow plate and the moving jaw increases, so as to push the moving jaw plate close to the fixed jaw plate. At the same time, the material is crushed to achieve the purpose of crushing;

When the moving jaw goes down, the angle between the elbow plate and the moving jaw becomes smaller. Under the action of the pull rod and spring, the moving jaw plate leaves the fixed jaw plate. At this time, the crushed materials are discharged from the lower opening of the crushing chamber.

b. When impact crusher works, the motor drives the rotor, and the materials fall into the high-speed rotating turntable from the upper part of the machine.

Under the action of centrifugal force, the materials will collide with the materials strongly that distributed around the turntable, and then break. After the two parts of materials collide and crush, they will form eddy current movement between the turntable and the shell, resulting in many times of friction and smashing. After many times of circulation crushing, they will be discharged from the discharge port.

5. Different Fineness & Shape

a. Jaw crusher is coarse crushing equipment, the discharge size is generally large, and the size of finished product is generally 10-350mm; due to the crushing principle of jaw crusher, there are many needle and flake finished aggregate;

b. Impact crusher, as a medium and fine crushing equipment, has a finer discharging particle size; the impact crusher has the function of shaping, with good discharging particle shape of finished aggregate, less water chestnut angle, and the particle shape is better than the cone crusher.

6. Different Performance

a. Jaw crusher has a deep crushing cavity without dead zone, so it has a large crushing ratio, strong production capacity, simple and reasonable structure, reliable work, low operating cost, high efficiency in operation, environmental protection, large adjustment range of discharge port, which can meet the requirements of different demands;

b. Impact crusher has the advantages of large feed inlet, high crushing chamber, impact resistance and wear resistance, economic and reliable operation, strong crushing capacity, good comprehensive benefit, and the finished aggregate has uniform particle size, beautiful particle shape and good selling price;

c. The crushing efficiency of the jaw crusher is lower than impact crusher. It’s because the jaw crusher does not work when discharging, but the rotor of the impact crusher keeps rotating, whenever the material enters the crushing chamber, it will be crushed.

7. Different Production Capacity

In short, the production capacity of jaw crusher is larger than that of impact crusher. The output of jaw crusher can reach 600-800t per hour (depending on the different manufacturers and product model), and the output of impact crusher is about 260-450t per hour.

8. Different Prices

The sales of jaw crusher in the market is higher than that of impact crusher, the main reason is that the price of jaw crusher is more favorable. Secondly, jaw crusher is a more traditional crushing equipment, and its performance, quality, power consumption and other aspects can meet the application requirements of users, it is more cost-effective and easy to attract users’ attention