Hammer Crusher

Hammer Crusher Introduction

Hammer crusher crushes materials through high-speed impact. Featuring simple structure and large crushing ratio, it is suitable for medium & low hardness materials with compressive strength ≤200MPa and moisture content ≤15%, providing a more economical solution for secondary and fine crushing before Raymond mill. Among them, heavy hammer crusher can realize one-stage crushing and forming to shorten the crushing process. However, neither of them is applicable for high-hardness or high-moisture materials.

Features & Advantages of Hammer Crusher

Large Crushing Ratio: Single unit crushing ratio can reach 10~25, and around 40 under specific conditions. It can crush bulk materials into medium-fine particles.

Simple & Economical: Mainly composed of rotor, hammerheads, screen plates, etc. Simple structure, small footprint, convenient maintenance, relatively low investment and maintenance cost.

Flexible Control: Discharge particle size can be flexibly controlled by replacing grate bars or adjusting the gap between hammerheads and grate bars.

High Efficiency & Low Consumption: Adopting impact crushing principle with high energy utilization rate, low unit energy consumption and outstanding production capacity.

Working Principle of Hammer Crusher

Materials enter the crushing chamber from the top feed inlet. High-speed rotating rotor drives hammerheads to strike materials at high speed for primary crushing. Then the crushed materials impact the impact liners on the machine casing at high velocity for secondary crushing. During rebounding or falling, materials are repeatedly impacted by hammerheads and collide with flying fragments for multiple crushing cycles. Finally, materials with qualified size are discharged through gaps of bottom grate screen, while larger particles stay above the screen plate and keep being struck by hammerheads until crushed to qualified size for discharge.

Application Scenarios of Hammer Crusher

Technical Parameters of Hammer Crusher

Frequently Asked Questions of Hammer Crusher

What is the difference between hammer crusher and impact crusher?

Hammer Crusher: It crushes materials via high-speed hammer impact, and grate bars control discharge size. It is poor at handling high-moisture and high-hardness materials. Its finished grain shape is inferior to impact crusher, but with simple structure and relatively low price.

Impact Crusher: It crushes materials through impact between high-speed rotor and impact plates, and discharge size is adjusted by impact plates. It is less prone to material blocking, produces excellent cubic finished grains with very few flaky particles.

How to choose between hammer crusher and impact crusher?

Hammer Crusher: Suitable for crushing brittle materials such as limestone, coal gangue and shale with Mohs hardness ≤5. It is an economical option for small & medium production lines, low requirement on finished grain shape and materials with extremely low moisture.

Impact Crusher: It can crush various medium-low hardness materials (Mohs hardness ≤7). It fits working conditions with strict requirements on grain shape or materials with certain moisture (≤10%). Although the initial investment is slightly higher, wear parts have longer service life and the overall operation cost is lower.

Why cannot hammer crusher process high-moisture materials?

There are grate bars at the bottom of hammer crusher. When material moisture is too high, the grate holes are easily clogged. Meanwhile, high-moisture materials will accelerate wear of hammerheads and grate bars and cause unstable discharge particle size.