Laboratory Double Roll Crusher for Medium Hardness Materials Coal Ore Sample Preparation

Product Overview

The laboratory double-roll crusher is a precision-engineered solution for medium-hardness material crushing in sample preparation applications. It utilizes two counter-rotating rolls to compress and fracture brittle substances, producing a uniform, flake-shaped output ideal for further analysis such as grinding, sieving, or direct analysis. The equipment is widely used in material science, geology, and industrial quality control where consistent particle size reduction is critical for accurate downstream testing.

This robust system is designed for coal, ore, rock, and other non-metallic materials with compressive strength up to 60 MPa (3 on the Mohs hardness scale) and moisture content below 6%. It delivers a high crushing ratio with an adjustable discharge size, allowing operators to fine-tune output from coarse to fine granules. Typical users include coal mines, power plants, construction material laboratories, chemical research institutes, and geological survey teams that require reliable, repeatable sample preparation.

With a focus on long-term reliability, this unit features a sealed crushing chamber to minimize dust contamination, and its hardened steel rolls are specially treated to prevent material sticking. Whether processing raw mineral samples or preparing fuels for proximate analysis, the equipment provides consistent performance under demanding laboratory conditions. Its compact footprint fits easily into standard lab layouts, and the straightforward operation minimizes training requirements.

Key Features

• Precision-Adjustable Output Size: The roll gap can be easily and precisely adjusted to control the final particle size, with a minimum setting of ≤3 mm. This ensures that the crushed material meets the strict size specifications needed for accurate analytical results, whether for coal proximate analysis or mineral liberation studies.
• High Crushing Ratio and Throughput: The double-roll extrusion design achieves a large size reduction in a single pass, minimizing the need for secondary crushing steps. With a production capacity of up to 1.5 tons per hour, the unit efficiently handles batch sample preparation while maintaining consistent particle quality.
• Uniform, Flake-Shaped Particles: The counter-rotating rolls produce a characteristic flake-like particle shape that packs well and is ideal for press-pellet preparation or easy sieving. This uniform shape enhances sample representativeness and reduces segregation during storage.
• Anti-Stick Roll Surface Treatment: Special surface processing of the rolls prevents material adhesion, a common problem when crushing slightly moist or sticky substances like coal. This feature significantly reduces cleaning downtime and ensures continuous operation without clogging, especially with lignite or high-moisture samples.
• Dual Roll Type Options: Available with smooth rolls for fine crushing of brittle materials or toothed rolls for larger feed or tougher substances. This versatility allows the system to be configured to match your specific sample type, optimizing both efficiency and particle output—smooth for coal and toothed for harder ores.
• Sealed Chamber for Dust and Contamination Control: The fully enclosed crushing zone contains dust and fines, protecting the laboratory environment and operators from airborne particles. Combined with easy-access design, it simplifies cleaning between samples to prevent cross-contamination, meeting stringent lab safety standards.
• Durable Heat-Treated Steel Rolls: The rolls are manufactured from carbon structural steel and undergo specialized heat treatment to achieve medium hardness with exceptional wear resistance. This ensures long service life even under continuous use with abrasive materials like quartzite or high-ash coal.
• Compact and User-Friendly Design: The unit’s small footprint conserves valuable bench space, while intuitive controls reduce operator training time. The straightforward construction allows quick disassembly for cleaning and maintenance, maximizing uptime in busy laboratories.
• B-Series Enhanced Durability: For laboratories with high-volume demands, the upgraded B-series model incorporates advanced materials and structural improvements. It offers extended wear life and enhanced operational convenience without changing the proven crushing mechanism, making it ideal for 24/7 industrial labs.

Applications

Technical Specifications

Why Choose This Product

• Proven Long-Term Reliability: The heat-treated steel rolls and robust frame are engineered to withstand years of continuous operation in demanding lab environments. Customers in mining and power sectors trust this design for its minimal maintenance and consistent crushing performance, even when processing abrasive materials like quartzite or high-ash coal.
• Customizable Crushing Solution: With the choice between smooth and toothed rolls, and the easily adjustable gap, the system adapts to a wide variety of material characteristics. This flexibility means you can switch from crushing coal to ore without extensive reconfiguration, saving time and increasing lab productivity.
• Superior Contamination Control: The sealed crushing chamber, combined with the anti-stick roll surface, preserves sample integrity and reduces airborne dust. This design cuts cleanup time drastically, a critical advantage in labs that handle multiple sample types and need to avoid cross-contamination.
• Precision Manufacturing for Consistent Results: Tight tolerances in roll alignment and gap setting ensure that every batch is crushed uniformly. This consistency translates directly into more reproducible analytical data, essential for quality control and research applications.
• Seamless Upgrade Path and Support: The B-series model offers enhanced materials and ergonomic improvements for high-throughput laboratories, providing extended durability without sacrificing the crusher’s proven performance. Backed by a team of engineers with deep expertise in sample preparation, we offer pre-sale consultation to configure the optimal roll type and gap range, along with responsive after-sale technical support.

Contact our team today to discuss your sample preparation workflow and receive a customized quotation. Whether you need a single unit for a research lab or multiple systems for a busy industrial facility, we have the expertise to deliver the right solution.