Sichuan Yadong Cement Co. in Pengzhou, China, has been relying on a 12.5 km overland conveyor from Beumer Group in order to convey limestone from its quarry to its silo. When constructed in 2009 it was the longest belt conveying system in Beumer history (Beumer installed a longer system in 2016). The troughed belt conveyor runs through hilly terrain and nature reserves, over streams and unstable ground. The second project includes two additional overland conveyors, with an overall length of 13.7km, transporting limestone to the cement plant. Unlike the first project, the task here was to build the conveyor across inhabited areas. Noise emission limitations set forth by the government also needed to be considered.
Whenever technically possible, the routing of the conveyor has been adapted to the topography
The route of the overland conveyor was coordinated between Beumer Group and the cement manufacturer. The system supplier calculated the tractive forces of the belt considering the eight horizontal curves with radii of 1,000-5,000m. 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 reliably check the predefined positions for the 460 supports for their suitability directly on site. Whenever technically possible, the routing of the conveyor was adapted to the topography. Height differences of up to 100m had to be overcome within shortest distances, so several sections were equipped with bridges of up to 55m. One section was realised with a 130m long tunnel.
Both overland conveyors have four horizontal curves with radii of 1,200, 1,500 and 1,800m. "We provided the engineering and the individual parts such as pulleys, motors, drive and control technology and the entire automation," says Dr. Echelmeyer. 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, with a fourth line planned.
Source www.bulkterminals.org