BEUMER GROUP GMBH & CO. KG

Difficult environment at TPI Polene Public ­Company Ltd safely overcome

The Beumer Group has successfully commissioned a conveyor for TPI Polene Public Company Ltd. The third largest cement producer in Thailand uses this complex system solution to transport crushed limestone from the quarry to the blending bed.

The challenge lay in the nature of the ground between the quarry and the cement plant. It was exceptionally demanding. Provision had to be made not only for numerous obstacles but also for a steep downhill section of the conveyor. The Beumer team designed a complex, but above all cost-effective, integrated system comprising a total of eight belt conveyors covering a distance of 6129 m. Beumer also supplied a PLC plant control system, transfer stations, filter systems and foreign body collectors.

The system is designed for a conveying capacity of 2200 t/h. The key items in the limestone transport system are two downhill belt conveyors operating in the generator mode followed by a troughed belt conveyor with horizontal curves. The material passes from the crusher discharge belt to the first two troughed belt conveyors. The material is then transferred to a long overland conveyor with a speed of 4.5 m/s by an accelerator belt with v = 2.6 m/s. Three more conveyors finally transport the material to the blending bed.

2 Cost-effective operation guaranteed

One particular feature of the downhill conveyors is their power generation. With a total of 640 kW/h generated energy that is fed into the power grid they make a substantial contribution to the cost-effective operation of the overall system. ­Beumer has a great deal of experience with conveying systems that can negotiate horizontal and vertical curves and operate in the generator mode. During the development it was necessary, for example, to ensure safe and carefully controlled stopping of the large belt system to avoid problems during unavoidable events, such as a power failure.

Beumer supplied four further belt systems with a total length of 989 m to deal with the discharge from the blending bed and supply the material to the raw mill feed hopper. The conveyors were all built and installed in only eleven months. The commissioning phase, lasting three months, was followed by performance tests. The team then handed over the entire plant to the customer. To ensure long-lasting, trouble-free, operation, Beumer supervised and monitored the installation and commissioning. The standard scope of supply also includes intensive training of the operating and maintenance personnel.

www.beumergroup.com

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