Sealed Laboratory Double Roll Crusher for Coal, Mineral, Ore Sample Preparation

Product Overview

This double roll crusher is a heavy-duty laboratory instrument engineered for the efficient size reduction of medium-hardness, brittle materials such as coal, minerals, and ores. Operating on the principle of counter-rotating rolls, it draws feed material into the nip point where compressive forces fracture the particles. The crushed product exits through an adjustable gap, ensuring a uniform top size with a high reduction ratio in a single pass.

Designed for rigorous sample preparation workflows, this unit finds application across industries including coal analysis, geological surveys, power generation, chemical production, and building material testing. Its ability to handle feed sizes up to 20 mm and produce output down to less than 5 mm makes it versatile for both intermediate and fine crushing stages, replacing the need for multiple machines.

The fully sealed housing is a critical feature for laboratories, preventing fugitive dust emissions and sample cross-contamination. This is particularly important when processing hazardous or valuable materials, safeguarding operator health and analytical accuracy. The sealing system includes dust-tight seals on the roll shafts and a leak-proof collection chute.

Built for longevity, the crusher features rolls precision-machined from carbon structural steel that has been heat-treated to a balanced hardness. This ensures excellent resistance to wear and impact, maintaining performance over thousands of hours of operation. The 4.0 kW motor provides ample torque to process up to 2.0 tons per hour, while the compact frame integrates easily into existing lab layouts.

Key Features

• Sealed Crushing Chamber: The completely enclosed design prevents dust leakage during operation, ensuring a clean and safe working environment. This containment is vital for handling toxic or fine particulate materials and complies with occupational health standards.
• Precision Gap Adjustment: A conveniently located adjustment mechanism allows the operator to set the spacing between rolls with micrometer-like precision. By changing the gap, the output particle size can be varied continuously from coarse to fine (down to ≤5 mm), meeting diverse analytical mesh requirements.
• Dual Roller Options (Smooth/Toothed): Available in two configurations: smooth rolls for generating uniform, flaky particles ideal for subsequent grinding; toothed rolls for enhanced grip on harder or fibrous materials, improving throughput and reducing slippage. Both types are constructed from the same durable steel and are easily interchangeable.
• High Reduction Ratio: Thanks to the optimal roll geometry and surface treatment, a single pass can reduce material from 20 mm to under 5 mm, achieving a reduction ratio of 4:1 or higher. This efficiency saves time and energy in sample preparation.
• Robust Construction: The core components are fabricated from high-grade carbon structural steel, heat-treated to a hardness that balances wear resistance with toughness. The base frame is welded heavy-gauge steel, ensuring vibration-free stability even during continuous operation.
• Uniform Output Particle Shape: The extrusion action produces particles with a predominant flaky shape, which is beneficial for subsequent pulverizing steps or for XRF sample preparation where consistent sample presentation is crucial.
• Low Maintenance Design: Thoughtful engineering provides easy access to the rolls and bearings through removable covers. Routine maintenance tasks like cleaning and inspection can be performed without specialized tools, minimizing downtime.
• Anti-Stick Roller Surface: The roll surfaces undergo a special treatment to reduce adhesion, particularly useful when processing coal samples that might otherwise cake. This feature ensures longer uninterrupted runs and consistent output size.
• Compact and Ergonomic: The machine’s small footprint conserves valuable bench space, while its logical layout places controls and feed hopper at a comfortable working height. Aesthetically, the powder-coated finish resists corrosion and is easy to clean.
• Customizable Configurations: Beyond the standard vertical orientation, a horizontal version can be custom-ordered for integration into automated sample processing lines. Additionally, custom voltage or motor specifications can be accommodated to meet regional requirements.

Applications

Technical Specifications

Why Choose This Product

• Industry-Proven Performance: With installations across coal, mining, and research sectors, our double roll crushers have a track record of consistent results, giving you confidence in your sample preparation chain.
• Tailored Engineering: Recognizing that material properties vary, we offer smooth and toothed roll configurations, along with the possibility of custom roller materials or gap settings to meet unique challenges.
• Quality Manufacturing: Every component is precision-machined and assembled under strict quality control, ensuring that each unit meets our high standards for reliability and safety.
• Long-Term Value: The heavy-duty construction and easy availability of spare parts mean low total cost of ownership, with minimal unplanned maintenance over the equipment's lifetime.
• Responsive Support: Our team of engineers is ready to assist with technical questions, provide maintenance advice, and help you configure the ideal crusher for your application. We value long-term partnerships.

For a detailed quote or to discuss your specific sample preparation needs, please contact our sales team—we look forward to crafting a solution that fits your laboratory.