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.
Customer Project Name Wanino SUEK Russia Coal terminal Wanino 2009
Bucket wheel stacker/reclaimer for coal
This machine is part of a complex stockyard system delivered completely by TAKRAF. It is designed for very low temperatures from -42 °C up to +39 °C.
coal 3,500/3,500 t/h
Customer Project Name Sishen Kumba Iron Ore (a division of AngloAmerican) Sishen iron ore mine, Northern Cape Province 2004
Bucket wheel stacker/reclaimer for iron ore
This machine is part of a complex stockyard system delivered completely by TAKRAF.
iron ore 3,710/6,250 t/h
Customer Project Name Pavlodar AO Aluminium Kazakhstan Aluminium plant Pavlodar 2010
Bucket wheel stacker/reclaimer for bauxite
This stacker/reclaimer was a replica of a machine built by TAKRAF in the 1980s. All mechanical and electrical equipment was updated for the new machine.
bauxite 700/500 t/h
Customer Project Name Greenfield Hot-Briquetted Iron (HBI) production project Not disclosed 2021
Bucket-wheel stacker/reclaimer for iron oxide pellets
This machine forms part of a complete material handling system awarded to TAKRAF in 2018 for both the plant’s raw material feed and finished product.
The system design brief called for the raw material (iron oxide pellets) to be received from self-unloading barges and conveyed to a stockpile. From there, it is reclaimed to be conveyed to day-bins fed by a tripper car. From the day-bins, material is discharged onto weigh feeders and then conveyed through a screening system before feeding the HBI production plant. The finished product is received from the plant and conveyed to a second stockpile, from where it is stacked, reclaimed and fed to a load-out station for the loading of trucks or trains for onward transport.
Iron oxide pellets Not disclosed
- We design, fabricate and supply a wide-range of machine capacities from 500 t/h to 20,000 t/h with boom lengths ranging from 25 m to 60 m
- Our machines can be specified as fully automated and thus work in the absence of an operator through a variety of sensors and are controlled from a central control point
- For large conveyance applications, we prefer a pantograph construction for our machines which increases machine stability