Double Roll Coal Crusher from 5tph to 120tph

1.Product Introduction

The Double Roll Coal Crusher is a specialized mechanical equipment engineered for coal crushing applications. By applying compressive and shearing forces through two counter-rotating rollers, it performs medium or fine crushing operations on coal lumps. This equipment is widely utilized across the coal, power generation, metallurgy, and chemical industries, and is particularly suitable for processing raw coal, coal gangue, and other materials with medium-to-low hardness. It offers several key advantages, including a simplified structure, stable operation, adjustable discharge particle size, and a remarkably low over-crushing rate.

2.Application

Its applications are extensive, primarily covering the following fields:

• Mining and Mineral Processing
  As the initial stage of mineral processing, crushing ore to the required particle size.

• Building Materials and Metallurgy
  Crushing construction materials such as sand and stone, or reducing material particle size to meet processing requirements.
• Coal Industry
  Particularly suitable for crushing raw coal (including gangue) in large coal mines or coal preparation plants.
• Other Fields
  Applicable in cement, chemical, power, and other industries for coarse and medium crushing of brittle materials. Suitable materials include river pebbles, limestone, iron ore, quartz sand, potassium feldspar, and various other raw materials.

3.Working Principle

• Combined Crushing via Compression and Shearing: Materials enter the crushing chamber through the feed inlet and are drawn between the two rollers by the frictional force on the roller surfaces. As the rollers rotate toward each other, the materials are continuously pulverized by a combination of compressive and shearing forces.

• Discharge Particle Size Adjustment: The gap between the two rollers is controlled via a wedge-style device or a shim adjustment mechanism to precisely regulate the discharge size. For instance, increasing the number of shims widens the gap for a larger output size, while removing shims reduces the size. Some advanced models are equipped with a hydraulic system to automatically adjust the roller spacing, significantly enhancing adjustment precision and response speed.

• Overload Protection Mechanism: To handle non-crushable foreign objects (such as tramp metal), the movable roller can retreat under the action of springs or hydraulic cylinders. Once the object is discharged, the roller automatically resets to its original position, effectively protecting the equipment from mechanical damage.

4.Advantages

• Low Over-crushing Rate: Compared to hammer crushers, it significantly reduces the generation of coal fines (powder), which enhances subsequent washing efficiency and combustion performance.

• Moisture Tolerance (Wet Material Handling): Capable of processing coal with high moisture content, effectively preventing clogging at the discharge outlet.

• Reduced Energy Consumption: Featuring a compact structure and high transmission efficiency, its power consumption per unit of production is superior to many impact-style crushing equipment.

• Ease of Maintenance: Most models support hydraulic opening/closing or spring adjustment, facilitating convenient roller shell (skin) replacement and blockage clearance.

5.Technical Specifications

6.Our Solutions