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CONVEYING


AUMUND PROVIDES BELT BUCKET ELEVATOR FOR GRAIN SIZES UP TO 80 MM


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ucket elevators are playing a standard equipment role in the bulk material conveying technology wherever


vertical conveying is involved. In more than 30 years, AUMUND continuously refined the bucket elevator technology and offers nowadays strong and most capable solutions worldwide for the vertical transport of bulk material. The standards forged by AUMUND have been proven in practice a thousand times over. AUMUND belt bucket elevators are characterised by large conveying heights of up to 200 m and conveying capacities up to 2,500 t/h. The AUMUND Belt Bucket Elevator BWG-GK for coarse grain makes the transport of material of grain sizes up to 80 mm possible. The main task during development of


a belt bucket elevator for coarse material is the protection of the belt from damage by the conveyed material. AUMUND therefore follows a new path: the narrow, overlapping bucket configuration permits the belt to disappear entirely behind the buckets. It is thus protected and no coarse material can become jammed between the backs of the buckets and the belt. The outer edges of the belt are simultaneously protected. Even in the case of a stoppage with filled buckets, no coarse material will be thrown behind the backs of the buckets (Fig. 1). Another task is to ensure a safe bucket


attachment and, considering the loading conditions of the buckets, even in case of scooping. Here, the design of the AUMUND steel cord belt with transversal steel cord reinforcement provides high pull-out strength and a reliable fixing for the bucket


fastening. These plate screws can be used exclusively for fitting the buckets (Fig. 2). The plate screws developed by


AUMUND differ significantly from conventional DIN plate screws and have been designed for a longer belt service life and higher carrying capacity. Therefore, further attachments to increase the clamping force at the bucket fastening are not necessary. The advantage: the belt runs smoothly and without high abrasion on the drive pulley. Only small dead loads have to be transported. Furthermore, the belt of a bucket


elevator needs to provide a high tensile strength, a low net weight and a low elongation, while simultaneous running in good alignment is demanded. This is achieved by a specialized production process and most of all by a high transversal rigidity. The bucket elevator belt has to be optimally designed for its attachments like buckets, rubber seals and endless splices in order to function as a reliable complete system in daily operation, even after many years. All this is ensured by the carcass construction of the AUMUND Bucket Elevator Belts in combination with the AUMUND bucket fastening system. Closely spaced high-tensile steel cords act as continuous tensile members. This allows belt strengths up to 4,200


N/mm for lift heights of more than 200 m. On the front side as well as on the back side of the tensile members steel cord transverse reinforcements strengthen the belt. In contrast to reinforcements with textile fabric inlays, the advantage of


53 LITRE CONTAINER KEEPS QUIET ON CONVEYORS


ensures silent travelling on conveyors and also gives excellent rigidity. The new XLmotion’s wider base (389


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mm instead of the broader European standard size base of 363 mm) can rest on narrower seats (57 mm instead of 70 mm) within an Automated Storage and Retrieval Systems (AS/RS). This reduces the amount of steel required and thus allows a more cost efficient system design. The XLmotion can also be adapted for use in any design of AS/RS. External dimensions are 599 mm (length) x 399 mm (container width)


28 Bulk Solids Today


he new 53 litre capacity BITOBOX XLmotion plastic container’s base features diagonal support ribbing. This


x 270 mm (height). Height options of 220 and 320 mm will be available from March. The container’s load capacity is 50 kg and stacking load is 250 kg. All XLmotion containers provide


options for subdivision with inexpensive, slim yet robust dividers. Containers can be divided by width and/or by length to give, a container with anything from two to 16 compartments. Other options for this container include:


drainage holes in the base or sides; ribbing adapted to a specific application; available with open or moulded grip holes on the short side; containers can be divided side- to-side as well as front-to-back.


Accessories include a drop-on lid


with snap lock, which does not add to the container height and will not come off when handling speed is increased; cross dividers; and longitudinal dividers. www.bito.co.uk


Fig. 1


Fig. 2


steel cord transverse reinforcements is the higher adhesion of the rubber. This higher adhesion ensures a permanent connection of the individual belt layers, even under the influence of temperature. Newly developed rubber compounds


based on ethylene propylene diene monomer (EPDM) allow operational ranges up to a material temperature of 150 °C for AUMUND Belt Bucket Elevators. Even peak temperatures up to 170 °C may be reached. Load tests under industrial daily routines proved that EPDM-belts are much more resistant to aging than belts made of styrene-butadiene rubber (SBR). www.aumund.com


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