Double Teeth Roller Crusher

Product Overview

A Double Teeth Roller Crusher is a heavy-duty crushing machine equipped with two toothed rollers that rotate toward each other to break bulk materials into smaller pieces. It is widely used in coal preparation, mining, mineral processing and other applications where feed material needs controlled size reduction with a relatively simple crushing arrangement.

The two rollers work together as the material passes through the crushing zone. The teeth grip, split and shear the incoming lumps, while the roller spacing determines the approximate discharge size. This crushing method is particularly useful for materials that can be effectively reduced through tooth engagement rather than high-impact fragmentation.

How Does a Double Teeth Roller Crusher Work?

The working process can be described as:

Feed → Tooth Engagement → Compression & Shearing → Size Reduction → Discharge

Material enters from the top and falls between the two counter-rotating toothed rollers. As the teeth engage with the feed, larger lumps are pulled into the crushing gap.

The opposing rollers apply mechanical forces to the material, causing it to crack, split and shear along natural or induced fracture surfaces. Once the material has been reduced sufficiently, it passes through the space between the rollers and leaves the crusher from the bottom.

The tooth profile, roller diameter, rotational speed and gap setting influence crushing performance and final product size.

Key Features

Double Toothed Roll Structure

Two toothed rollers create a continuous crushing zone. Their coordinated rotation helps capture incoming lumps and maintain a steady crushing process.

Strong Tooth Engagement

The teeth penetrate and grip suitable feed materials, making the crusher effective for large, irregular lumps that require mechanical splitting and shearing.

Controlled Discharge Size

The distance between the rollers, together with tooth geometry and operating conditions, influences the size of the discharged material.

Suitable for Coal and Bulk Materials

The crushing principle is particularly applicable to coal and selected minerals where controlled reduction is required without relying primarily on high-speed impact.

Compact Crushing Arrangement

The twin-roll configuration provides a relatively compact crushing mechanism, which can simplify integration into material-handling and processing systems.

Replaceable Crushing Teeth

The teeth are wear components and can be configured or replaced according to the material characteristics and operating conditions.

Technical Specifications

Parameter	Specification
Equipment Type	Double Teeth Roller Crusher
Crushing Principle	Compression, Splitting & Shearing
Crushing Mechanism	Two Toothed Rollers
Drive Type	Electric
Material	Coal, Limestone and Suitable Minerals
Capacity	Application Dependent
Maximum Feed Size	Project Dependent
Discharge Size	Project Dependent
Tooth Configuration	Customized
Motor Power	Application Dependent
Installation	Stationary / Customized

Actual specifications should be determined according to feed characteristics, required throughput, product size and plant configuration.

Main Components & Design

Toothed Rollers

The two rollers form the primary working mechanism. Their diameter, surface configuration and rotational relationship affect material capture and reduction.

Crusher Teeth

Teeth directly contact the feed material. Tooth shape, spacing and wear resistance can be selected according to material properties.

Drive System

The motor, coupling and transmission components provide the torque required to rotate the crushing rollers.

Bearings

Heavy-duty bearings support the roller shafts and accommodate the mechanical loads generated during crushing.

Crusher Frame

The frame holds the rollers, bearings and drive assemblies in the required alignment.

Gap Adjustment

The roller gap can be configured according to the desired product size and material characteristics, depending on the crusher design.

Applications & Materials

A Double Teeth Roller Crusher can be used in applications such as:

• Coal crushing and preparation
• Coal-fired power plant fuel preparation
• Mining material reduction
• Limestone processing
• Mineral preparation
• Bulk-material size reduction

Commonly considered materials include:

• Run-of-mine coal
• Thermal coal
• Lignite
• Limestone
• Shale
• Gypsum
• Selected soft and medium-strength minerals

Material suitability depends on hardness, abrasiveness, moisture, clay content and lump size. Highly hard and abrasive feed may require a different crusher configuration or specialized wear protection.

How to Choose the Right Double Teeth Roller Crusher?

The correct Double Teeth Roller Crusher depends on both the material and the required crushing result.

Start with the maximum feed lump size and required capacity. Large feed requires sufficient roller diameter and an appropriate crushing opening, while higher throughput may require larger rollers or a different drive configuration.

Next, define the target discharge size. The roller gap and tooth arrangement should be selected around the required product specification rather than capacity alone.

Coal and mineral properties also influence the design. Moisture and clay can affect material flow, while hardness and abrasiveness determine tooth wear and drive requirements.

The crusher should also match the rest of the plant. A typical arrangement may include:

Feeder → Double Teeth Roller Crusher → Screen → Conveyor

For equipment selection, provide the material type, maximum feed size, required capacity, target discharge size, moisture condition and application.

Advantages & Customization

The toothed twin-roll arrangement provides a direct mechanical method for reducing suitable bulk materials. For coal and compatible minerals, it can combine material capture with controlled crushing in a continuous process.

Possible customization areas include:

• Roller diameter
• Roller width
• Tooth profile
• Tooth spacing
• Crushing gap
• Motor power
• Drive arrangement
• Wear-resistant materials
• Frame dimensions
• Feed and discharge configuration

Tooth geometry is especially important because different materials require different approaches to material capture, fracture and wear resistance.

Frequently Asked Questions