COMBINED STACKER / RECLAIMERS

Combined stacker / reclaimers fulfill a dual role and can operate as stackers or as reclaimers. They can stack material in stockpiles and then also reclaim material via a bucket-wheel at the boom tip.

TAKRAF combined stacker / reclaimers are equipped with a bucket-wheel boom and are primarily employed where medium to high or even very high material flow rates are to be stacked and then later reclaimed by the same machine. Our typical machines cover the following flow rates and sizes:

• Stacking and reclaiming capacity: 500 t/h to 20,000 t/h
• Rail gauge: 6 m to 20 m
• Boom length: 25 m to 60 m

Our machines are all specifically designed to our client's unique requirements and incorporate various solutions according to their specific application.

In certain countries, such boom-type machines are also included in the “balanced machines” nomenclature referring to a machine that boasts some form of counterweight.

Fixed Rocker Arrangements for Low or Medium Flow Rates

In applications involving low or medium flow rates and/or medium length booms, machines in which the bucket-wheel and counterweight boom are combined in a fixed rocker arrangement are generally preferred. This arrangement results in a reduced number of articulation points.

An integral part of the machine is the tripper car and integrated conveying system which transports material to the bucket-wheel boom and then to the stockpile. The tripper car and conveying system is often equipped with a "bypass function" that enables material to bypass the boom and continue along the conveyor system.

Pantograph Arrangements for Higher Flow Rates

Where higher flow rates and/or longer boom lengths are required, we prefer a machine design in which the bucket-wheel and counterweight boom are combined in a pantograph arrangement. The pantograph arrangement ensures that with large boom loads, small changes in the point of balance are stabilized, which has a significantly positive impact on machine steadiness. A drawback with this design however is the increased number of articulation points.

Semi-Automated and Automated Machines

The majority of our combined bucket-wheel boom machines are semi-automated; however, there is a growing trend towards full automation and we are able to supply fully automated machines too. These machines incorporate further control systems and sensor logic and are controlled and monitored from a central control station.