Stacking tubes were developed to reduce dust and degradation during coal stacking operations.

If you have high stockpiles and drier product they are effective and cheap.

If you have wet coal they are very blockable so there isn't much point....in trying to reduce dust.

The main feature is that they offer support to the conveyor as well as providing dust reduction.

They are also easy to regulate since when used in series they eliminate the requirement for an overhead tripper. ■