The Leading Global Resource for the Bulk Solids Processing Market
Pneumatic systems and support equipment for conveying, weighing and batching of dry materials
Klinkenberg BV is specialized in internal transport and bulk handling using screw conveyors
Dec is a leading global manufacturer of powder handling and containment systems
Leading manufacturer of conveyors and material handling equipment
International specialist in the world of bulk materials and process technology
Individual advice and efficient solutions for the whole weighing technology process
Developer and manufacturer of top of the range safety and measurement products
Doubrava is one of the world's leading names in industrial plant constructions
Systems for cleaner, safer and more productive handling of bulk materials
Designer and manufacturer of custom engineered size reduction machinery
BECKUM - With the completion of a belt conveyor installation for Asia cement Group in Chinese Sichuan, the BEUMER Group has once again demonstrated its pioneering role as a specialist for intralogistic conveying.
The major order with a total volume of 5 million Euros includes development and installation of a 12.5-kilometre long installation through rough mountainous terrain. The Asia Cement Group, a major building material manufacturer headquartered in Taipei (Taiwan), has built a new plant in the vicinity of Chengdu, the capital of Sichuan. Currently, a furnace chain with a capacity of 4200 tons per day is installed there. For moving the limestone from the quarry to the factory, located 30 km away, the Asia Cement Group has commissioned BEUMER with building a curving troughed belt conveyor installation.
For more than 20 years the Asia Cement Group has relied on BEUMER expertise and has numerous installations and bucket elevators by the machine-manufacturing company in operation. Due to the conditions of topography and the resulting logistical and engineering requirements, development, bridging and commissioning of the conveyor had to come from one source. In May 2006 the Asia Cement Group placed the order for the 12.5-kilometre long troughed belt conveyor with a mass flow of 1500 tons per hour and a conveying speed of four metres a second with the BEUMER Group.
The terrain to be conquered consists of mountains and bamboo forests. Since a good portion of the bamboo is under nature conservation, no approval was given for a service route, nor was any clear cutting allowed. Even the subsoil posed a serious challenge for BEUMER engineers: for one thing, the ground is unstable because of previous coal mining. At other points the ground consists of granite that can only be removed to a certain extent. In addition, along the route a segment has to be routed through 1.5 kilometres of water. Such extreme outer constraints entail having to mount manually about 90 percent of the installation on site. Since transport by lorry is to some extent impossible the structures have to be carried by mules, piece by piece. For that reason BEUMER designed the entire facility in such a way that all parts can be screwed on and have a carrier length of only three metres. In that way optimum transport can be ensured.
After the order was placed, BEUMER in consultation with the Asia Cement Group optimised the routing of the troughed belt conveyor on the spot. With eight horizontal curves having a radius of some 1000 to 5000 metres, the machine manufacturer calculated the precise belt tensile forces in costly simulations. Besides rough terrain, extreme altitude differences of up to 100 metres posed a particular challenge. In order to minimise total costs as much as possible, BEUMER has used four horizontal curves and spans the mountains with bridges up to 55 metres in height.
The Asia Cement Group is responsible for steel construction of the bridge according to specifications by BEUMER engineers and under the constant supervision of two technical supervisors. The BEUMER Group develops, builds and delivers the core parts for the drive and take-up stations as well as all belting and drive technology.
For the 12.5-kilometre long conveyor installation the length of the belt is 25 kilometres. The belt has to be vulcanised in 56 places. The width of the belt is 1200 mm and its rigidity is 2800 N/mm. Besides the eight horizontal curves the installation has 28 vertical curves. In order to keep belt tensile forces under control through six declining segments and six inclining ones the installation is operated with special motors and with BEUMER controls adapted to them. The installed driving power comes to six times 500 kW, frequency regulated with BEUMER controls. Driving power is divided into two drive pulleys at the installation's feed and head, respectively. In this case, one pulley acts as a double drive for 1000 kW and one as a simple drive for 500 kW. A movable take-up weight was dispensed with and instead the take-up weight is adjusted once and geometrically frozen with a take-up winch.
The troughed belt conveyor should be installed and in operation by mid 2008. Despite all logistical and topographic obstacles the BEUMER Group has coped with every challenge and is right on schedule with construction. And with that, the company has not just delivered a piece of machinery but developed and achieved the customer's desired results as a whole.
© BEUMER Group GmbH & Co. KG
This article is published by BEUMER Group GmbH & Co. KG
The BEUMER Group is an international leader in the manufacture of intralogistics for conveying, loading, palletising, packaging, sortation and distribution technology.
Together with Crisplant a/s and Enexco Teknologies India Limited the ...