Double Roller Crusher: Engineered for Secondary & Fine Crushing of Soft-to-Medium-Hard Materials
The double roller crusher is primarily engineered for secondary and fine crushing of soft to medium-hard materials, including coal, coke, limestone, clinker, slag, and shale. Crafted with adaptability in mind, its rollers are available in smooth or toothed configurations—tailored to match specific material properties and crushing goals, ensuring optimal performance across diverse industrial scenarios.
1. What is a Roller Crusher?
A cornerstone of crushing equipment lineups, the roller crusher is a precision-engineered machine that utilizes two counter-rotating rollers to break down materials. It embodies a focus on durability, efficiency, and user-centric design.
Core Components
The roller crusher comprises rigorously tested key parts:
High-Wear Roller Assemblies: Made from premium alloys to withstand abrasive materials and extend service life.
Heavy-Duty Roller Support Bearings: Ensuring stable rotation even under high crushing loads.
Precision Pressure & Gap Adjustment Devices: For fine-tuned control over crushing force and discharge size.
Reliable Driving System: Optimized for consistent power transmission and low energy consumption.
Technical Specifications (Standard Offering)
Ideal for fine crushing processes with:
Feed size: ≤80mm
Finished product size: 50μm–20mm
Typical Applications of the Roller Crusher
The roller crusher is trusted across industries for:
Producing high-quality artificial sand by crushing pebbles and construction waste.
Fine crushing iron ore, quartz, and other minerals in mining operations.
Processing raw materials for the ceramic industry to meet strict granularity requirements.
Directly crushing coal (post iron/impurity removal) in the coal sector, streamlining production workflows.
It excels at handling coarse, brittle bulk materials—accommodating large feed particles while offering flexible discharge adjustment, a hallmark of equipment versatility.
2. Advantages of Choosing a Double Roller Crusher
The double roller crusher stands out for its blend of performance and practicality, backed by decades of industrial equipment expertise:
Efficient, Targeted Crushing: Materials are crushed via optimized rolling, grinding, and shearing mechanisms between rollers, delivering a large crushing ratio (up to 8:1) and uniform particle size.
Compact & Durable Design: Engineered with a space-saving structure, lightweight yet robust body, and stable operation—minimizing on-site footprint and reducing maintenance downtime.
Powerful & Customizable: Driven by two high-torque motors (calibrated for energy efficiency), it features a key highlight: precision-adjustable discharge size. Users can easily modify the roller gap to match exact finished material requirements, from fine powders to coarse aggregates.
Model Versatility with Expert Support: Both smooth-roller (for low-abrasion materials like coal) and toothed-roller (for cohesive materials like shale) variants are available. Technical teams provide tailored recommendations based on material characteristics (hardness, moisture), required crushing ratio, output size, and capacity—ensuring customers select the optimal model for their needs.
3. Working Principle of a Roller Crusher
The roller crusher operates on a straightforward yet effective principle, refined through years of field testing:
Materials to be crushed fall from the feed inlet into the gap between the two counter-rotating rollers. Guided by engineered roller geometry, they are squeezed and crushed before naturally discharging as finished products.
Intelligent Overload Protection
A standout design feature—when uncrushable or excessively hard materials (e.g., metal scraps) enter, the rollers automatically retract via integrated hydraulic cylinders or springs, widening the gap to allow debris to pass through. This protects critical components from damage without manual intervention.
Precise Discharge Control
The gap between the two counter-rotating rollers directly dictates maximum discharge granularity. The adjustment system enables tool-less, fine-tuned modifications, ensuring consistent product quality batch after batch.
