2PG Series Double Roller Crusher: Features and Advantages

In modern mining and manufactured sand production lines, choosing the right crushing equipment is critical to improving operational efficiency and reducing energy consumption. As a commonly used medium and fine crushing device, the double roller crusher is favored by many users in the aggregate and coal industries due to its compact structure, stable operation, and controllable particle size. It performs particularly well when handling brittle and medium-hard materials such as limestone, coal, and slag.

The 2PG series double roller crusher developed by Leimeng builds on traditional structural advantages, featuring optimized design and upgraded performance to enhance both adaptability and reliability.

1. Application Positioning of the Double Roller Crusher

The double roller crusher is mainly used for medium and fine crushing of materials with low to medium hardness. It is suitable for industries such as building materials, chemicals, metallurgy, power, and coal, and is widely used in the following scenarios:

• In manufactured sand production lines, as a medium and fine crushing stage for brittle rocks like limestone and shale—especially suitable for applications where particle shape requirements are moderate.
• In coal crushing and coal preparation plants, for crushing raw coal into finer particles that offer improved combustion efficiency.
• In slag processing and construction waste recycling, where consistent output rather than precise particle shape is the priority.

Compared to jaw crushers and cone crushers, double roller crushers offer irreplaceable advantages in scenarios where moderate particle shape, low dust generation, and cost-effective operation are key requirements.

2. Structure and Working Principle of the 2PG Series

The 2PG series double roller crusher by Leimeng is made up of several key components and is designed for efficiency and compactness:

Main Components:

• Roll Core and Roll Shell:
  The roll core, made of high-strength alloy steel, acts as the load-bearing core of the roller, offering excellent toughness and structural integrity. The roll shell, which directly contacts the material, is cast from high-manganese steel or hard alloy, ensuring high wear resistance.
• Tapered Ring and Side Protection Plate:
  The roll shell is mounted onto the roll core via a tapered ring and secured with high-strength bolts. This design ensures firm assembly and simplifies future maintenance. Worn roll shells can be replaced individually, reducing maintenance time and cost while enhancing the durability of the crushing chamber.
• Bolt Connection Structure:
  All major components are joined using high-strength bolts, enabling easy disassembly and replacement.

Working Principle:

Leimeng's double roller crusher adopts a mechanical compression crushing principle, where two rollers rotate in opposite directions, creating strong compressive force between them. Materials fed from the top fall between the rollers and are crushed through continuous high-pressure compression, shearing, and splitting.

Once inside the compression zone between the rollers, the material is gradually crushed to the target particle size. Microcracks and fracture surfaces form within the particles due to the applied pressure, leading to effective fragmentation. Crushed material is then discharged naturally from the bottom.

Compared to impact crushers, the double roller crusher offers these key advantages:

• Lower energy consumption: The compression-based mechanism avoids violent impact, making energy use more efficient.
• Better control of particle size: Adjustable roller pressure allows for precise output size control. The crushed particles are more uniform with lower fines, ideal for projects requiring dust suppression.
• Quieter operation: With integrated dust-proof panels and cleaning devices, the crusher operates with minimal noise and dust—meeting environmental protection standards.

Automatic Overload Protection System: Enhanced Safety

In real-world operations, feed materials may contain uncrushable items such as metal blocks, concrete debris, or ultra-hard ores. If not addressed, these can cause the equipment to jam or even lead to roller damage or machine failure.

To prevent such risks, Leimeng’s double roller crusher integrates spring-based or hydraulic overload protection systems, providing proactive safety measures.

During normal operation, the rollers maintain a fixed compression gap to ensure steady crushing. When uncrushable material enters the crushing chamber, the overload protection system automatically activates, reducing the compressive force and allowing the rollers to move slightly apart. This creates enough clearance for the foreign object to pass through safely.

Two configurations are available based on application needs:

• Spring overload protection: Simple design and fast response, suitable for light to medium loads.
• Hydraulic overload protection: Offers high control precision, ideal for heavy-duty, high-pressure applications such as open-pit coal mining or aggregate plants with many impurities.

3. Performance Features and Key Advantages

Leimeng’s 2PG series double roller crusher has been significantly improved in design and performance. Its core advantages include:

Compact Design and Flexible Installation

The 2PG series has a compact overall footprint, making it suitable for small to medium-sized crushing sites. It can also be easily integrated into existing production line upgrades.

Low Operating Costs and Easy Maintenance

Thanks to its simple structure and replaceable wear parts, the crusher requires minimal maintenance. Component replacement is fast and easy, helping reduce long-term operating costs.

Adjustable Discharge Size for Versatile Use

The gap between the rollers can be adjusted to achieve precise control over output particle size. This flexibility is especially valuable for manufactured sand plants or applications with moderate particle shape requirements.

Low Noise and Eco-Friendly Operation

The low noise level during operation makes the equipment suitable for environmentally friendly production lines, aligning with modern standards of energy conservation and emission reduction.

4. Model Selection and Typical Application Scenarios

Leimeng offers a range of models to meet various customer needs:

Application Case:

Project Background: 1 million tons/year construction aggregate project. The original system had high dust levels and frequent maintenance issues.

Solution: Replaced the hammer crusher with one unit of Leimeng 2PG1210 double roller crusher.

Results:

• More uniform product particle size
• Reduced wear part costs by approx. $4,000 per month
• Energy consumption reduced by approx. 12%
• Significant improvement in system stability

5. Choose Leimeng—Your Trusted Crushing Solution Provider

Leimeng adheres to the philosophy of “Technology-driven, Serving the World,” aiming to provide high-efficiency, intelligent, and eco-friendly crushing and screening solutions for global customers.

Technical Support: Professional model selection advice and customized crushing solutions

After-Sales Service: Easy maintenance with readily available spare parts

Fast Delivery: Short lead times and responsive support to keep your project on schedule

High Cost-Performance Ratio: Competitive pricing without compromising on quality

Conclusion

As infrastructure development and resource recycling continue to advance, there is a growing demand for more efficient and economical crushing equipment. With its mature structure, low energy consumption, and controllable discharge size, the Leimeng 2PG series double roller crusher has become the ideal choice for many industrial customers.

If you’re looking for a reliable, energy-saving, and stable solution for medium and fine crushing, Leimeng’s double roller crusher is a choice you can trust.

For detailed model selection advice and pricing information, please contact the Leimeng technical team. We are here to provide you with professional support.