Carryback builds up on idlers, creating out-of-round components that lead to belt mistracking.
Allowed to dry, carryback accumulations can become concrete-hard and reduce belt cleaning efficiency, damage the belt/other equipment, and lead to chute plugging problems.
There are many different techniques that people use to solve carryback issues. A multiple-cleaner system has been proven one of the most effective ways to prevent carryback. Many plants have belt scrapers in operation but still have carryback because they haven’t executed best practices or fully understand the importance of multiple-cleaner systems. Carryback often causes other problems if left unresolved (belt mistracking, safety hazards, production loss, excess cleanup, etc.,). The investment usually pays for itself within hours.
There are easy and cost effective ways to reduce and even prevent material carryback.
It is incredibly costly to have carryback and fairly inexpensive to prevent it.