Large double roll crusher

A large double roll crusher is a type of compression crusher used in the mining and aggregate industries. It is designed to handle large feed sizes and produce a uniform output of crushed material with a low degree of fines. Double roll crushers are typically used in secondary or tertiary crushing applications.

Here's how a large double roll crusher works:

1. Feed hopper: The raw material is fed into the feed hopper, which leads to the two rotating rolls.

2. Rotating rolls: The two parallel rolls, mounted on horizontal axis shafts, rotate in opposite directions. The teeth on the rolls are designed to grip and compress the material between them.

3. Adjustable gap: The distance between the two rolls can be adjusted to control the output size and shape of the crushed material. This feature allows for flexibility in producing different product sizes and grades.

4. Compression: As the material enters the gap between the rolls, it is subjected to intense compression, which breaks the particles into smaller sizes. The rolls also shear and tear the material, resulting in a relatively cubic shape with reduced flat and elongated particles.

5. Eccentric shaft: An eccentric shaft is used to adjust the gap between the rolls and control the rate of feed. This ensures that the crusher operates at optimal efficiency and maintains a consistent output.

6. Electrical control system: A sophisticated electrical control system monitors and regulates the crusher's operation, including the speed of the rolls, the gap adjustment, and the feed rate.

7. Dust and particle control: To minimize dust generation and ensure a clean working environment, a dust collector is often integrated into the crusher system.

8. Lubrication system: Proper lubrication is crucial to maintain the reliability and longevity of the crusher's moving parts. A dedicated lubrication system is included to ensure that the rolls, bearings, and other moving components are well-lubricated.

9. Safety features: Large double roll crushers are equipped with various safety devices, such as emergency stop buttons, guards, and sensors to prevent unauthorized access and ensure operator safety.

Advantages of large double roll crushers include:

* High productivity and output capacity

* Relatively low energy consumption

* Good particle shape and size distribution

* Reduced fines production

* Low maintenance costs

However, it's essential to consider the limitations and potential challenges of using large double roll crushers, such as:

* Limited application range, suitable mainly for soft to medium-hard materials

* High initial investment cost

* Requirement for skilled operators and maintenance personnel

Before investing in a large double roll crusher, it's crucial to evaluate your specific crushing needs, material characteristics, and budget to ensure that it is the right solution for your application.