A Comprehensive Guide to Understanding Aggregate Crushing Processes

A Comprehensive Guide to Understanding Aggregate Crushing Processes

Aggregate crushing process involves multiple stages of crushing, such as primary crushing, secondary crushing, and tertiary crushing. The aim of aggregate crushing is to reduce the size of large rocks into smaller particles, which can then be used as a construction material.

Crushing Processing Equipment

Basic types of crushing plant are: jaw crusher, cone crusher, impact crusher, and VSI crusher. Mobile versions of these machines are also available. Here is a comprehensive list of crushing equipment that is commonly used in aggregate production line:

- Jaw crusher: This type of rock crusher employs compression and squeezing force for breaking rock into small particle sizes. It is primarily used as the primary crushing machine in aggregate production line.

- Cone crusher: It is a versatile cone crusher that combines crushing, grinding, and screening capabilities, and is mainly used in the secondary and tertiary crushing stages, where the final-sized products are required.

- Impact crusher: This type of crusher is characterized by its impact and can be used both as a primary and secondary crusher. It is mainly used to crush medium-sized stones and produce sand and gravel.

- VSI crusher: VSI crusher is a vertical shaft impact crusher that uses a high-speed rotor and a crushing chamber designed to throw the materials against the walls of the crushing chamber. It is commonly used in the last stage of the crushing process to shape the final products.

Understanding the Crushing Process

In aggregate production, the primary aim is to reduce the size of rocks to a level that can be processed by the subsequent crusher stages. As the size of rocks decreases, more energy is required to crush them into smaller sizes.

The primary crusher, usually a jaw crusher, is used to reduce the rocks to a manageable size that can be fed into the secondary crusher. The material is passed through a screening machine, known as a grizzly, which sorts out oversized rocks and protects the secondary crusher from damage.

The secondary crusher, usually a cone crusher, is used to further reduce the size of the rocks, and the tertiary crusher, often an impact crusher, is used to produce smaller particles.

Throughout the crushing process, the material is continuously fed into the crusher chamber, commonly through an apron feeder or a vibrating grizzly feeder. The crushed material is then screened through a series of screens to separate different sizes of particles.

The final products of the crushing process are commonly used in construction projects such as roads, railways, buildings, and bridges. They are also used as a base material for the production of concrete and asphalt.


Understanding the aggregate crushing process is essential for construction companies, quarries, and anyone involved in the extraction and crushing of aggregate materials. These professionals rely on crushed aggregate materials for various purposes, such as road and railway construction, airport runways, and agricultural projects. By following the steps outlined above, aggregate producers can ensure that their crushing process is efficient, safe, and meets their specific requirements.

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