Feeder-Breakers utilize a horizontal crushing roll and chain-and-flight drag conveyor to process a variety of run-of-mine minerals. They perform primary size reduction and meter the flow of material by properly loading the belt conveyor at a controlled rate. These units transfer the mined material from the haulage equipment to the discharge point, providing storage capacity and minimizing cycle times. McLanahan Feeder-Breakers come in a variety of configurations and designs for use underground and above. They are particularly useful in underground and open pit mining of coal, lignite, salt, gypsum and other friable minerals and in the processing of coke from delayed coker units. 

Feeder Breaker
McLanahan Feeder Breaker

Why McLanahan Feeder-Breakers

McLanahan has applied the same rugged design principles to the Feeder-Breaker line as we have to our well-known crushing line and with advancements to the latest technology. McLanahan was the first manufacturer to incorporate torque limiting couplings in direct, alignment-free drives on both the conveyor and breaker systems, eliminating shear pins and chain drives. Touchscreen controls and diagnostics are included to enhance and simplify operation. These are easy to use and give valuable feedback if a fault is encountered. The control program also includes an electronic manual with drawings and schematics for easy viewing and reference. Maintenance is made simple with easy access to replaceable components and shaft assemblies that can be removed in one piece.

How Feeder-Breakers Work

The Feeder-Breaker utilizes engineering-class roller chain and solid steel flights between a sprocketed head and tail shaft to drag the material along a steel deck. The head shaft is driven hydraulically or mechanically with a shaft-mounted hydraulic motor or shaft-mounted, right angle reducer with torque control coupling. The breaker roll is driven mechanically with a shaft-mounted, right angle reducer with torque control coupling. The fabricated steel machine frame is built to withstand the toughest environments. Developed to meet safety requirements of mining, the Feeder-Breaker is a Mine Safety and Health Administration (MSHA) approved design.

Operation of the Feeder-Breaker drag conveyor and breaker roll interlock with the downstream belt conveyor. Through the programmable logic controller, these functions are timed to shut down at designated intervals when the belt conveyor stops or when material is not present. The receiving end of the Feeder-Breaker can be designed to receive material from high volume trucks, front-end loaders, shuttle cars or at ground level fed by a dozer.

Popular Applications for Feeder-Breakers

Feeder-Breakers can accept large feed lumps of friable minerals and produce a 6” to 12" (150mm to 300mm) one-dimensional product at rates up to 6000 tph (5400 mtph). Depending on the feed arrangement, these units can be designed to hold up to two to three times the load from a haulage vehicle, providing substantial storage capacity to allow the cycling of multiple haulers at optimum rates.

Benefits of McLanahan Feeder-Breakers

  • Base frames are manufactured from fabricated steel and designed to withstand harsh mining environments
  • Engineering-class outboard roller chains of appropriate pitch and strength flanking solid steel flight bars to form the conveyor
  • Abrasion-resistant steel, replaceable deck liners plug welded to the deck plate
  • Direct, shaft-mounted mechanical drives with torque control coupling and direct hydraulic drives eliminate noisy, problematic chain drives and shear pins
  • Adjustable breaker height settings
  • Sophisticated programmable logic controllers with diagnostics and touch screen operations

Feeder-Breakers Models

McLanahan Feeder Breaker Stationary/Mobile Feeder-Breakers
Mc Lanahan Crawler Mounted Feeder Breaker Crawler-Mounted Feeder-Breakers

Featured Resources

Lake Vermont Case Study On Feeder-Breakers McLanahan custom Feeder-Breakers allows Lake Vermont Mine to operate with less downtime.
Lake Vermont Coal McLanahan Field Service
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Frequently Asked Questions

What are some key options to consider?

Consider hydraulic or electro-mechanical drive options for the feeder.

What other technologies should I consider?

Depending on the overall head room or space requirements, you could consider a Drag Feeder or Apron Feeder to a Roll Crusher or Sizer.

How is the Feeder-Breaker fed?

You need to consider how the equipment will be fed. Will it be dozer trap design, or will the Feeder-Breaker be located under a hopper? If so, what is the capacity of the hopper, and how will it be fed? By a front-end loader? Haul trucks? What is the capacity of each?