Extending the life of apron feeders

December 20, 2017

Apron feeders play an important role in a cement plant’s production line, extracting bulk materials from under a dump hopper or regulating the feed of heavy bulk materials to a crusher.

FLSmidth’s newly designed impact rollers can improve the performance and extend the life of your apron feeder. 

Optimised design
With integrated bearings and tight sealing, the design ensures high performance even in dusty environments. The concentration of rollers can be optimised to cater for the load in a particular area of the feeder. The roller support system is equipped with pre-greased roller bearings, labyrinth shaft seals and steel dust covers on both sides. Pre-greasing prolongs the lifetime of the bearings and removes the need for an external lubrication system or additional piping.

Roller upgrade
The new roller has been designed for retrofitting to all types of apron feeders –whether built by FLSmidth or most other manufacturers. When converting to the new design, the initial installation of the new support rails and rollers takes approximately one week. 

This fast conversion typically involves:

  • Removing approximately half of the apron feeder lamellas
  • Removing the complete lubrication system
  • Removing all existing rollers, including support frame
  • Installing new roller support assembly
  • Inserting rollers where required
  • Re-installing the apron feeder lamellas

Benefits include:

  • Prolonging the lifetime of bearings and rollers
  • Improving apron feeder reliability
  • Reducing maintenance downtime
  • Eliminating the need for lubrication
  • Reducing the wear of lamellas
  • Providing easy replacement of one or more rollers

Since it prolongs the lifetime of bearings and rollers and reduces wear on lamellas, the new roller design improves apron feeder reliability and reduces maintenance downtime. There is no need for lubrication and rollers can be easily replaced. 

Fast replacement
Subsequent roller replacements can be executed in one or two days, ideally suited for a normal maintenance stop. Rollers can be replaced without moving the apron feeder from its location to perform the upgrade, requiring only minor disassembly of lamellas from the feeder.

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