Advantages of Impact Crushers Over Hammer Crushers

What advantages do impact crushers offer compared to hammer crushers? Impact crushers possess the following significant technical advantages over hammer crushers:

(1) They effectively process materials with high moisture content, preventing blockages in the crusher.

When processing materials with excessively high moisture content, the feed chute and impact plates of the impact crusher can be equipped with heating devices to prevent material adhesion. The impact crusher does not require a bottom screen plate, effectively preventing blockages. Hammer crushers, however, cannot utilize heating methods to prevent material adhesion and must be equipped with a bottom screen plate, increasing the likelihood of blockages.

(2) Impact crushers are suitable for both soft materials and extremely hard materials.

The impact crusher's plate hammers are mechanically clamped to the rotor, imparting significant rotational inertia during operation. Compared to hammer crushers (where hammers are suspended), the impact crusher's rotor possesses greater momentum, enabling processing of harder materials while maintaining lower energy consumption.

(3) Output particle size can be conveniently and flexibly adjusted across a wide range.

Impact crushers can adjust output particle size through multiple methods, such as modifying rotor speed or adjusting the gap between the impact plate and grinding chamber. Gap adjustment can be performed mechanically or hydraulically. Hydraulic systems allow convenient gap modification via local control buttons or remote control systems. In contrast, hammer crushers can only adjust output particle size by replacing the bottom screen plate.

(4) Wear on vulnerable components is lower than in hammer crushers, with higher metal utilization rates.

Wear on impact crusher hammers occurs only on the material-facing surface. When rotor speed is normal, feed material impacts the hammer surface (striking face), leaving the hammer's back and sides unaffected. Even wear on the material-facing surface is minimal. Moreover, the bottom grinding bars are easily replaceable. The metal utilization rate of impact crusher plate hammers can reach 45%–48%. In contrast, hammer crusher hammers hang freely, experiencing wear on the top, front, back, and sides. Compared to plate hammers, hammer wear is more severe, with a metal utilization rate of only about 25%. Furthermore, the rotor body itself may also suffer wear. The bottom screen plate of hammer crushers is severely affected by wear, requiring complete replacement of the grating, and the process of replacing the screen plate is relatively complex.

(5) Simplified spare part replacement and reduced maintenance costs.

The impact crusher rotor is equipped with only six plate hammers, which can be conveniently replaced using specialized tools provided. Replacing a set of plate hammers requires only one shift. Replacing the grinding bars in the bottom grinding chamber also takes only a few tens of minutes, significantly reducing maintenance time and costs. In contrast, hammer crushers feature over 100 hammers, making hammer set replacement time-consuming and labor-intensive with higher maintenance costs. Bottom screen plate replacement is also extremely cumbersome.

(Technical parameters and data mentioned herein may be updated with product upgrades. Click website customer service for the latest equipment specifications.)

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