Engineering & Mining Journal

JUN 2019

Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr

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Page 88 of 115

CONVEYORS JUNE 2019 • E&MJ 87 Scan for more information HEAVY-DUTY CONVEYOR PULLEYS Drum Pulleys Wing Pulleys Clean Flight ® Wing Pulleys Engineering Class Pulleys CEMA C, D, E IDLERS Troughing Idlers Equal & Unequal Impact Idlers Self-Aligning Impact Beds Galvanized Frames Offset Troughing Wide Base Idlers Transitional/Adjustable Idlers Channel Insets Flat Carriers Return Idlers V-Return Idlers ed a safe conveying system design, that would prevent any environmental impact and noise pollution during the bulk material transport. In the first team, employees of the local authorities worked in close cooperation with our experts." The second team was made up of 10 BEUMER Group employees that assembled the system. Special cranes and helicopters were used for the assembly work. "We assigned a third team for this: the Heliswiss International AG from Küssnacht, Switzerland," Prevedello said. "They provide transport and construction flights with heavy lift helicopters. Extremely precise flight maneuvers were necessary so that the technicians could safely assemble the elements suspended from the helicopter to the steel structure. The pilots had to guide the components exactly to the bore holes of the con- necting piece so that the second team could then bolt them together." The BEUMER Group employees were working on platforms attached to cranes in heights of up to 45 m. The use of horizontal and vertical curves made this trans- port option feasible, Prevedello explained. "It allowed us to adapt the sections to the optimum route and we didn't have to use straight line sections to build around obstacles," Pre- vedello said. "Angles of inclination of up to 15° are possible, depending on the characteristics of the material to be trans- ported and the topography, with lengths of more than 12 km. Due to the ability to navigate curves, considerably fewer and in some cases no transfer towers are required. The customer gets an ideal solution, which allows for substantial cost sav- ings and the system continuously transports the material even over challenging ascending sections and downward slopes — this was a great advantage especially in Flémalle." BEUMER precisely calculated the static and dynamic tractive forces of the belt during the development phase. Selecting the proper drive technology and belting ensures the longevity of the entire system. "The installed motors are mostly adjustable, which permits the loads to be optimally distributed on the drive units under various operating condi- tions," Prevedello said. "If the belt conveying system conveys downhill, the system works in generative operation. The gen- erated electric energy is fed back into the public network by a regenerative feedback unit." BEUMER also provides stockpile equipment. "We offer the full range of stackers and scraper reclaimers," Prevedel- lo said. "These can cover different functions as for example simple storage or mixing of the bulk material, and ensure a maximum mixing effect. Users can also efficiently homoge- nize different bulk material qualities, which ensures the uni- formity of the raw materials used. My colleagues carry out the entire engineering of the system. They calculate the storage dimensions and provide the design and static calcu- lations of the associated storehouses. The blending beds are customized according to the requirements." BEUMER pro- poses either longitudinal or circular stockpile designs. The recommended design shape results from the spatial condi- tions and the amount of the material to be stored. Addition- ally, BEUMER provides material-specific detailed solutions with robust and low-wear equipment. The environmental im-

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