VDMA

Germany 2019

Best of Germany 2014 - Mining Equipment and Mining Technology

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VDMA 35 2019 • VDMA MINING SUPPLEMENT The rolling hills are covered with dense bamboo forest, parts of which are listed as nature reserve. For this reason, the govern- ment did not approve a service route nor deforestation. The ground also presented a major challenge for the BEUMER Group engineers. "The ground is unstable due to previous coal mining. In other areas, the ground consists mostly of granite that could only be partially removed," Echelmeyer said. Another section of 1.5 km had to be guided across a river. These framework conditions contributed to the fact that 90% of the system was installed manually on site. As it was impossible for trucks to transport the components, they were carried by mules, one part at a time, to the place of installation. The route of the overland conveyor was coordinated between BEUMER Group and the cement manufacturer. The system suppli- er calculated the tractive forces of the belt considering the eight horizontal curves with radii of 1,000 m to 5,000 m. The routing was checked for its feasibility on-site. The complete route was checked by employees on foot, passing through rough terrain, in order to re- liably check the predefined positions for the 460 supports for their suitability directly on-site. Whenever technically possible, the rout - ing of the conveyor was adapted to the topography. Height differ- ences of up to 100 m had to be overcome within short distances, so several sections were equipped with bridges of up to 55 m. One section was realized with a 130-m-long tunnel. In close cooperation with the customer, BEUMER Group designed the overland conveyor and the bridges. The system supplier devel- oped, built and supplied the core components for the drive and take- up station as well as the belt of an overall length of 25 km, the idlers and the drive technology. Since February 2009, the overland conveyor has been transporting bulk material from the quarry to the bulk load- ing system. Since commissioning of the first section, the mass flow of the conveyor was increased in two steps. Today, the system conveys a mass flow of 2,200 mt/h at a conveying speed of 4.5 m/s. In July 2013, Asia Cement contracted BEUMER Group again for an additional, efficient overland conveyor to replace the trucks transport- ing the limestone from the bulk loading system to the cement plant. A mass flow of 2,200 mt/h of limestone per hour was necessary to meet the plant's requirements. For this project, the first conveyor was to be customized to these requirements. "We were planning a second troughed-belt conveyor with an overall length of 13.7 km," Echelmeyer said. It would be the longest system in the history of BEUMER. Projects of that size are often unpredictable, so flexibility was need- ed from the engineers. During the planning phase, the cement manu- facturer acquired another plant in Lanfeng, approximately 10 km away. "Now we had to design the system so that both plants could be supplied with limestone," Echelmeyer said. The team had to divide the overland conveyor in two parts. After 5.4 km, an additional conveyor can be added to be fed to Lanfeng in the future. In February 2015, the system supplier started with the installation of the conveyor frame. Both overland conveyors have four horizontal curves with radii of 1,200 m, 1,500 m and 1,800 m. "We provided the engineering and the individual parts such as pulleys, motors, drive and control technolo- gy, and the entire automation," Echelmeyer said. The installation was monitored by a BEUMER Group supervisor and the wiring of the system was supported by a BEUMER electrical engineer. The system supplier was also in charge of the commissioning in May 2016. The troughed belt conveyor is now supplying three kiln lines, a fourth line is planned. For this system, the Chinese government has set out exact reg- ulations on the noise emission levels so the residents would not be impacted. "We had to minimize the noise to an extremely low level," Echelmeyer said. The system supplier took several constructive mea- sures to reduce the noise emissions. "We used noise-reducing idlers and customized protective covers on the drive stations," Echelmeyer said. In collaboration with the operator, BEUMER Group optimized the conveyor frame and the completely enclosed conveyor bridge. BREATHE THE NEXT GENERATION The New CFT Dry Deduster Type CFD Optimised design Lower operating costs New safety features and smart technology Sustainability for low environmental impact Member Companies of the CFH Group Sub-Exhibitors: www.cft-gmbh.de VISIT US! Hall C3 no. 235 Courtyard Booth no. 23C.14 Completed in 2016, this troughed conveyor supplies three kiln lines.

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