How to Choose a Crusher? Working Principles of Crushers?

Some customers may be using crushing equipment for the first time and unsure how to select a crusher. In reality, understanding the working principles and application ranges of various crushers provides a solid foundation for making the right choice. Then, by considering the specific rock material to be crushed—its hardness, feed size, and desired final product size—the question of how to choose a crusher should become straightforward. How to Choose a Crusher? Knowledge of Working Principles for Different Crushers Helps You Make the Right Decision!

Below are the working principles and applications of commonly used crushing equipment:

1. Working Principle of Jaw Crushers:

The motor drives the eccentric shaft via a V-belt and pulley system, causing it to rotate. This rotation forces the movable jaw to perform a rhythmic, fixed-trajectory squeezing motion, thereby crushing the material. The crushed material is then discharged through the outlet. As the preferred equipment for material crushing, jaw crushers are used for medium and coarse crushing of various ores, rocks, and other materials with compressive strengths below 320 MPa.

2. Working Principle of Hammer Crusher:

The hammer crusher primarily relies on impact energy to crush materials. During operation, the motor drives the rotor to rotate at high speed. Material is uniformly fed into the crushing chamber, where high-speed rotating hammers impact, shear, and tear the material to achieve crushing. Simultaneously, the material's own gravity propels it from the high-speed rotating hammers toward the inner liner and screen bars of the frame. At the bottom of the rotor, a screen plate is installed. Material particles smaller than the screen aperture size pass through the screen plate and are discharged. Material larger than the screen aperture size is retained on the screen plate and continues to be struck and ground by the hammers until crushed to the desired discharge particle size, finally passing through the screen plate and out of the machine. The PC Series High-Power Hammer Crusher is suitable for crushing medium-hard brittle materials with compressive strengths below 180 MPa, such as limestone, coal gangue, gypsum, and shale.

3. Working Principle of Impact Crusher:

The impact crusher is a crushing machine that utilizes impact energy to break materials. During operation, the motor drives the rotor to rotate at high speed. When material enters the impact plate zone, it collides with the impact plates on the rotor for initial crushing. The material is then thrown onto the impact device for secondary crushing, bounces back from the impact liner plate to the impact plate zone for further crushing, and this process repeats. The material progresses through the first, second, and third impact chambers, being repeatedly crushed from larger to smaller sizes until it reaches the desired particle size and is discharged through the outlet. Adjusting the gap between the impact frame and the rotor allows for controlling the final particle size and shape of the crushed material.　Stone material falls directly from the top of the machine onto the high-speed rotating disc. Under the action of high-speed centrifugal force, it collides at high speed with another portion of stone material diverted in an umbrella pattern around the disc periphery, achieving high-density crushing. After mutual impact, the stone material forms a vortex motion between the disc and the machine shell, causing multiple mutual impacts, friction, and crushing before being discharged directly from the bottom. This creates a closed-circuit multiple-cycle process, with screening equipment controlling the final particle size. The PF series impact crusher is designed for medium and fine crushing of various ores and rocks with compressive strengths below 320 MPa, such as basalt, granite, river pebbles, and similar materials.

4. Working Principle of Cone Crusher:

During operation, the motor drives the eccentric sleeve to rotate via a V-belt, large pulley, drive shaft, small bevel gear, and large bevel gear. The crushing cone axis rotates and moves under the eccentric sleeve's drive, causing the crushing wall surface to alternately approach and retreat from the bowl liner surface. This forces the material within the annular crushing chamber formed by the fixed cone and moving cone to undergo continuous squeezing, impact, and bending until crushed to the required particle size, then discharged from the bottom. Cone crushers are suitable for crushing ultra-hard materials of medium hardness or higher, such as granite, basalt, quartzite, iron ore, and river pebbles.

Due to space limitations, the working principles of other less commonly used crushing equipment will not be elaborated upon. We trust you now have a clear answer regarding how to select a crusher.

Friendly Reminder: When selecting crushing equipment, always choose a professional crusher manufacturer! OCP is a well-established and reputable mining machinery manufacturer you can trust! Click the website chat icon for immediate free consultation—available 24/7.