Double Roll Crusher

Introduction of Double Roll Crusher

The double roll crusher (also known as double roll crusher) crushes material through compression and shearing between two counter-rotating rolls. Based on the roll surface type, it can be divided into smooth roll and toothed roll: the smooth roll double roll crusher mainly uses compression and grinding, producing excellent particle shape and uniform size, suitable for fine crushing and shaping. The toothed roll double roll crusher features teeth and grooves on the roll surface, providing strong shearing capability and excelling in processing sticky and wet materials. Modern equipment commonly uses hydraulic systems for precise adjustment and overload protection, hence also known as hydraulic double roll crushers, mainly used in secondary and tertiary crushing stages.

Features and Advantages of Double Roll Crusher

Hydraulic Smooth Double Roll Crusher

Excellent Particle Shape: Crushes material through compression and grinding, producing more cubic-shaped particles with uniform size and extremely low flaky and elongated particle content (stably controlled below 8%, and even down to 5%).

Precise and Controllable: The hydraulic system precisely adjusts the gap between the two rolls (typically adjustable range of 1~40 mm), thereby strictly controlling the discharge size.

High Efficiency and Stability: Integrated frame structure provides good rigidity. The roll shell is made of high-chrome manganese steel wear-resistant material with a service life of 10~15 months. Material is forcibly drawn into the crushing zone under high pressure of 50-200 MPa, achieving high efficiency with lower energy consumption compared to similar fine crushing equipment.

Tramp Iron Protection: When encountering uncrushable hard material, the hydraulic system quickly retracts the movable roll, increases the roll gap to allow the hard object to pass through, and then automatically resets.

Hydraulic Toothed Double Roll Crusher

Strong Shearing: The teeth and grooves on the roll surface actively bite the material and apply strong shearing and splitting forces, achieving high crushing efficiency and large crushing ratio, capable of crushing material in a single pass.

Not Prone to Clogging: Effectively processes materials with high moisture and high viscosity (such as clay, shale, certain slimes), effectively preventing clogging and roll wrapping.

Wide Adaptability: In addition to sticky and wet materials, it can also effectively process frozen and clogged materials, construction waste containing uneven hardness impurities, and some fibrous materials.

Wear-Resistant and Long Life: The roll teeth are typically cast or hardfaced using high-hardness, high-wear-resistant alloy materials, effectively resisting material wear and providing long service life.

Working Principle of Double Roll Crusher

The hydraulic system drives two rolls to rotate counter-directionally, forming a crushing zone. The smooth roll achieves laminating crushing through pure static compressive force, causing the material to fracture regularly along internal cleavage planes. The finished product is cubic with low flaky and elongated particle content, minimizing over-grinding and achieving precise particle shape shaping and stone powder content control.

The toothed roll uses its tooth structure to bite the material, applying shearing and splitting forces through a penetrating effect. While crushing, it separates qualified products, achieving high crushing ratio and large processing capacity, effectively ensuring continuous system throughput.

Application Scenarios of Double Roll Crusher

Technical Parameters of Double Roll Crusher

Frequently Asked Questions About Double Roll Crusher

How to choose the right double roll crusher?

Smooth Double Roll Crusher: Produces excellent particle shape with low fines content, suitable for fine crushing and shaping of dry, hard materials such as high-quality manufactured sand, high-grade concrete aggregates, steel slag, etc.

Toothed Double Roll Crusher: High crushing ratio and strong processing capacity, especially adept at handling wet, sticky materials without clogging or roll wrapping. Suitable for secondary and tertiary crushing of complex materials such as coal, clay, shale, construction waste, etc.

What are the advantages of a hydraulic double roll crusher compared to a spring double roll crusher?

Hydraulic Double Roll Crusher: Allows online stepless adjustment of the discharge opening, convenient operation with high precision. When encountering uncrushable material, the hydraulic system automatically retracts and resets. Additionally, the hydraulic system can automatically compensate pressure, ensuring continuous and stable production line operation.

Spring Double Roll Crusher: Requires manual discharge opening adjustment with the machine stopped. Limited tramp iron protection capability, requiring manual reset, which affects production efficiency. Long-term use leads to decreased spring pressure, causing capacity fluctuations and requiring frequent shutdowns for inspection and maintenance, resulting in higher operating costs.

Can the roll shell of a double roll crusher be turned over for reuse?

Yes, periodically turning over the roll shell can effectively mitigate issues such as wear, indentation, and uneven wear, thereby extending the equipment's service life.