Sizer Crusher

Product Overview

A Sizer Crusher is a heavy-duty crushing machine used to reduce large lumps of coal, limestone and other suitable minerals to a controlled product size. It typically uses low-speed, high-torque crushing rolls fitted with teeth or crushing elements to apply compression and shearing forces to the material.

Sizer crushers are commonly used in mining, coal handling and mineral processing plants where large feed material needs to be reduced before screening, conveying or further processing. The equipment can be configured for different capacities, feed sizes and product-size requirements according to the application.

How Does a Sizer Crusher Work?

A Sizer Crusher works through a controlled crushing process:

Feed → Material Capture → Compression & Shearing → Size Reduction → Discharge

Large lumps enter the crushing chamber and are captured by the rotating crushing rolls. The teeth or crushing elements pull the material into the crushing zone, where compression and shearing forces break the lumps into smaller pieces.

The roll configuration, tooth profile and crushing gap influence the final product size. Once the material reaches the required size, it passes through the crushing zone and is discharged to downstream equipment such as a screen or conveyor.

Key Features

Low-Speed, High-Torque Crushing

The low-speed, high-torque mechanism is suitable for processing large lumps while maintaining controlled crushing action.

Controlled Product Size

Roll geometry, crushing gap and tooth configuration can be selected according to the required product size.

Large Feed Handling

A suitable Sizer Crusher configuration can accept relatively large feed material, making it useful for ROM coal and other bulk materials.

Heavy-Duty Construction

The frame, shafts, bearings, drive system and crushing components can be engineered for demanding mining conditions.

Reduced Over-Crushing

The controlled crushing mechanism can help limit unnecessary size reduction when processing suitable materials.

Easy Process Integration

A Sizer Crusher can be integrated with apron feeders, screens and belt conveyors to form a complete material-handling circuit.

Technical Specifications

Parameter	Specification
Equipment Type	Sizer Crusher
Crushing Principle	Compression & Shearing
Crushing Mechanism	Twin Crushing Rolls
Material	Coal, Limestone and Suitable Minerals
Capacity	Application Dependent
Maximum Feed Size	Project Dependent
Output Size	Project Dependent
Motor Power	Application Dependent
Drive Type	Electric
Installation	Stationary / Customized

Actual specifications should be selected according to material properties, required capacity, feed size and target product size.

Main Components & Design

A heavy-duty Sizer Crusher generally consists of several major assemblies:

• Crushing Rolls – Apply crushing forces to the incoming material.
• Crushing Teeth – Capture and break large lumps.
• Shafts – Transfer torque to the crushing rolls.
• Gearbox – Provides the required speed and torque transmission.
• Electric Motor – Drives the crushing mechanism.
• Frame – Supports the crushing and drive assemblies.
• Protection System – Helps protect the drive and major components under overload conditions.

Component configuration can vary according to capacity and project requirements.

Applications & Materials

Sizer Crushers are commonly considered for:

• Coal mining and coal handling
• Open-pit mining
• Underground material handling
• Limestone processing
• Mineral processing
• Bulk material preparation

Typical materials include:

• Coal
• Limestone
• Gypsum
• Salt
• Suitable soft to medium-strength minerals

Material suitability depends on hardness, abrasiveness, moisture, stickiness, bulk density and feed lump size. Very hard or highly abrasive materials require specific engineering evaluation before equipment selection.

How to Choose the Right Sizer Crusher?

Selecting the right Sizer Crusher requires more than looking at the required capacity. The maximum feed size, material properties and target product size all affect the equipment configuration.

Start with the required throughput in tonnes per hour and determine the largest feed lump expected in normal operation. The required output size should then be defined so that the crushing gap, roll configuration and tooth design can be selected accordingly.

Material characteristics are also important. Coal, limestone and other minerals can have significantly different hardness, moisture, abrasiveness and clay content. These properties influence crushing performance and wear-part selection.

The Sizer Crusher should also match the upstream and downstream equipment. For example:

Apron Feeder → Sizer Crusher → Vibrating Screen → Belt Conveyor

For an accurate recommendation, provide the material type, required capacity, maximum feed size, target output size, moisture condition and installation requirements.

Advantages & Customization

A properly configured Sizer Crusher can provide stable material reduction, controlled product sizing and continuous operation in suitable mining applications. Its low-speed crushing mechanism is particularly relevant where large lumps need to be reduced without unnecessary size reduction.

For large mining projects, the equipment can be customized according to the process requirements. Possible configuration areas include:

• Crushing capacity
• Feed opening
• Output size
• Roll diameter
• Tooth configuration
• Motor power
• Gearbox arrangement
• Frame dimensions
• Wear protection
• Installation configuration

The final configuration should be based on actual material and process conditions rather than a standard specification alone.

Frequently Asked Questions