McLanahan Corporation

Feeder-Breakers

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.

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.