Mobile crushing and screening plants mount crushers, screens, conveyors and control systems on a wheeled or tracked chassis. A single truck can transport the unit between sites. In contrast, stationary crushing and screening lines anchor to a single site for long-term operations.

What Are Rock Crushers and How Do They Work?

Crushers are key equipment in mining, construction and aggregate industries. They break large rocks, ore, or other materials into smaller, more usable pieces. This equipment reduces the material by means of compressive force, impact, attrition or shear that are specific for the type of crusher being used. The main function of an industrial rock crusher is to generate particles of similar sizes.

The crushing process is commonly conducted in several stages. Each stage of the crushing process implements a different type of crusher to gradually reduce the size of the material. The first step is crushing the material by using larger crushers that can reduce the material into smaller sizes that will be used in the next stage. Following this, the secondary and tertiary stages are employed to further reduce the particle size using smaller crushers until the desired output is achieved.

During the process, screens are utilized in order to segregate the crushed material into various size fractions. This guarantees that the end result has the needed specifications.

Four Core Crushing Methods

Compression crushing applies a compressive force to the material between two surfaces until it breaks. Jaw crushers squeeze feed between a fixed and a moving jaw. Cone crushers press material between a rotating mantle and a stationary concave bowl.

Impact crushing accelerates material against fixed surfaces using a high-speed rotor fitted with hammers or blow bars. Impact crushers and hammer mills work with various rock types.

Attrition crushing subjects material to friction between particles or against a grinding surface. Particle-on-particle contact reduces material size.

Shear crushing applies tangential force to slice or tear material apart. Roll crushers leverage shear in specialized applications.