The production of sand and gravel aggregates generally goes through three stages: crushing, screening and storage. Among them, crushing requires multiple crushing processes such as coarse crushing, medium and fine crushing. The selection of crushers plays a crucial role in obtaining finished sand and gravel aggregates that meet the industry standards. So, what are the common types of sand and gravel aggregate crushers and how should they be selected in actual production?
Coarse crusher for sand and gravel aggregates
Coarse crushers for sand and gravel aggregates are generally jaw crushers, hammer crushers and impact crushers.
Jaw crusher:
Simple structure, high working efficiency, capable of crushing large and hard stones. After its coarse crushing is completed, it lays a very good crushing foundation for the subsequent medium and fine crushing operations.
Hammer crusher:
It has a large crushing ratio, high production capacity, uniform products, and less over-grinding. It is suitable for stone raw materials with low Mohs hardness and coarse crushing compressive strength not exceeding 150 megapascals.
Impact crusher:
It has a large crushing ratio, and the crushed materials are cubic particles. In sand and gravel aggregate production projects, if the raw material hardness is relatively high and the size is no more than 500mm, an impact crusher can be selected for coarse crushing.
The processing site of sand and gravel aggregate equipment
Ii. Medium (fine) Crusher for sand and gravel aggregates
For medium (fine) crushers used in sand and gravel aggregate processing, impact crushers or cone crushers can be selected.
Impact crusher:
It is mainly suitable for crushing stone raw materials with medium or low hardness and abrasiveness index. The output particle size is uniform, the particle shape is excellent, and the powder content of the product is low under normal working conditions. Moreover, this type of equipment has the advantages of low investment cost, simple maintenance and convenient replacement of wear parts.
Cone crusher:
It is mainly suitable for crushing stone raw materials with high hardness and abrasiveness index. However, it has high requirements for continuous feeding, high investment cost and complex maintenance.
The main difference between impact crushers and cone crushers lies in the particle size of the finished products. The particle shape of the finished products of impact crushers is better than that of cone crushers. The particle shape of the finished sand and gravel aggregates is uniform and mainly cubic.
Cronus' sand and gravel aggregate crushers are of high quality and reasonable quotations. If you want to choose a suitable model, please inform our company of the stone raw materials to be processed, the project scale and address. We will arrange a dedicated person to answer your questions.
