The mineralized river bed sand gravel crusher(Double-roll crushers) represent an excellent solution for crushing riverbed gravel in mineral processing,

particularly in scenarios where product shape is critical and minimizing fines generation is a priority.

mineralized river bed sand gravel crusher

1.. What is “mineralized riverbed gravel”?
Mineralized riverbed gravel typically refers to:

A mixture of sand and gravel within natural alluvial deposits

Containing heavy minerals such as native gold, platinum group metals, cassiterite, ilmenite, and zircon

Particle size: 0–150mm, commonly 5–60mm pebbles + sand

Physical properties: High hardness (predominantly quartz, flint, granite pebbles), highly abrasive, often containing silt and water

2.Advantages of Double Roll Crushers (Why Are They Suitable?)

Excellent Particle Shape: Employing the principle of compression crushing, double roll crushers produce material particles predominantly in a cubic shape with low content of needle and flake particles. This is highly advantageous for applications requiring well-shaped aggregates, such as concrete aggregates.

Minimal Over-Grinding: Compared to hammer crushers or impact crushers, double roll crushers generate a lower proportion of powder (stone dust) during crushing. This better preserves the desired particle size of sand and gravel, increasing the yield of finished products.

Simple Structure, Easy Maintenance: The mechanical structure is relatively straightforward, making operation and maintenance relatively simple with fewer potential failure points.

Good Adaptability to Moisture- and Mud-Containing Materials: Double-roll crushers demonstrate superior adaptability to materials with slightly higher moisture and clay content (commonly found in riverbed gravel) compared to cone crushers, exhibiting reduced susceptibility to blockages. However, pre-treatment remains necessary for highly viscous materials.

Controllable particle size adjustment:
Output particle size can be conveniently controlled by adjusting the gap between the two rolls, offering excellent flexibility.