What are the secondary crushers

In sand and gravel crushing production lines, the entire crushing process can be divided into primary, secondary, and tertiary crushing based on the number of crushing stages. The number of crushing stages in a production line corresponds to the number of crushing processes. Typically, primary crushing is invariably handled by jaw crushers, while tertiary crushing is exclusively performed by sand makers. So, what are the secondary crushers?

Generally, secondary crushers primarily include cone crushers and impact crushers. Though both serve as secondary crushing equipment, they differ in performance design. Below is a detailed introduction to each.

1. Cone Crusher

The cone crusher employs a layer compression crushing principle, suitable for secondary crushing of materials with compressive strength not exceeding 350 MPa. The crushed products are predominantly cubic in shape with minimal needle and flake content. Additionally, it incorporates a telescopic oversize protection device. When excessively hard foreign objects enter the crushing chamber or the machine experiences overload, it automatically widens the discharge opening to expel the foreign material. Higher-end models also feature automatic chamber cleaning, ensuring stable equipment operation.

2. Impact Crusher

Impact crushers achieve material fragmentation through the striking and impact of impact plates, emphasizing crushing over grinding. They are suitable for processing medium-hardness or soft materials. The final product exhibits excellent particle shape, predominantly cubic, with minimal over-crushing and low content of needle-like and flaky particles, delivering outstanding shaping results.

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