The heart of the machine is a rotating barrel supported from the main structure. This barrel is fitted with a large number of reclaiming buckets arranged along its length and around it circumference, which pick up the material that has been fed to the base of the pile by means of a harrow which traverses across the pile face. The oscillating rake system disturbs the material in the stockpile across its entire width causing it to slide down the slope of the stockpile into the path of the rotating buckets. Material collected in the buckets is discharged in a layered stream onto a belt conveyor contained within the barrel, and is then delivered to a downstream conveyor running alongside the stockpile. Where the plant layout dictates an in-line pile arrange, bi-directional machines can be provided.
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Reclaimer with two separately driven bucket wheel and speed regulated trolley Boom Type Bucket Wheel Reclaimer Combined bucket wheel and counterweight boom Drum or Barrel Reclaimer Predestined for homogenizing of bulk materials for downstream processes Reclaimers A variety of different machine types can be employed to reclaim stacked material from stockpiles. Typical machines range from bridge-type bucket-wheel reclaimers to boom-type bucket-wheel reclaimers and drum reclaimers.
In this manner, power transmission between bucket-wheel trolley and bridge is enhanced which has a positive effect on machine life. A number of further configurations are also able to be specified, ranging from the number of mounted bucket-wheel trolleys to the manner in which they are arranged. Machines employing two bucket-wheel trolleys are able to achieve a higher reclamation rate, whilst also achieving greater homogenization at lower flow rate fluctuations. When installing two bucket-wheel trolleys, the trolleys can be mechanically linked so that they both share a common trolley drive system.
A trolley speed controller, developed in-house by TAKRAF, is then employed as this increases interaction efficiency between the two bucket-wheel trolleys.
We are also able to provide bridge bucket-wheel reclaimers for one or two directional reclaiming and all our machines are automated. This arrangement results in a reduced number of pivot joints. 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 and tilt safety.
A drawback with this design however is the increased number of pivot joints. Automation options The majority of our boom-type bucket-wheel reclaimers 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 room, doing without a machine control cabin.
Drum Reclaimers Drum reclaimers are particularly suited to the homogenization and blending of bulk material for sophisticated downstream processes, especially for iron ore or coal processing.
Specific design features of our drum reclaimers Up to buckets can be arranged in 6 to 8 parallel rows with these symmetrical buckets swiveling automatically in the pre-selected working direction. The buckets continuously remove thin layers of material from the entire cross-section of the stockpile and discharge this onto a belt conveyor located within the drum.
As a result, the stockpile is levelled evenly and cleanly with each passage. For specific hard-working areas that are in contact with material i.
Rakes are equipped with prongs or scraper rods, depending on particle size of material to be reclaimed, and create a continuous flow of material on the escarpment of the pile over the entire width directly into the reclaiming buckets. In regions with extremely low temperatures, rakes can even be equipped with hardened tines that are able to break frozen surfaces.
Our drum reclaimers are fully automated and thus work without an operator. Our machines boast a variety of sensors, which enables them to be controlled and monitored from a central control room.
At least some of the series of openings terminate spaced from the ends of the drum member and auxiliary tapered openings 30 are arranged in line with each such series, between the end of the associated series and the drum end. The provision of auxiliary openings of the forms discussed is found to increase the fatigue resistance of the drum member. It is also helpful if the individual openings 8 of each axial series are uniformly spaced from each other. Description This invention relates to barrel reclaimers for bulk materials, and in particular to the drums of such reclaimers. Known barrel reclaimers comprise an elongate cylindrical drum rotatably mounted at its opposite ends on support frames which run on rails at the sides of a bulk material stockpile. Openings in the drum have scoop buckets projecting from them to pick up material from the stockpile as the drum is rotated and progressed along the rails into the stockpile. The material picked up by the buckets is deposited on a conveyor which extends axially through the interior of the drum and which delivers the material to a fixed conveyor at the side of the reclaimer track for further transport.
BARREL TYPE BLENDER RECLAIMER & TRASNFER CAR