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Products and solutions, 2000-08-28, 02:00 AM

Krupp Fördertechnik successful with wagon unloaders

The Materials Handling business unit of Krupp Fördertechnik GmbH in St. Ingbert-Rohrbach reports two milestones in wagon unloader business. The unit recently received an order for two wagon unloaders from China, its first breakthrough on this fiercely contested market. Around the same time Ferteco Mineracao S.A. in Brazil started operation of the most powerful wagon unloader that Krupp Fördertechnik has yet built.

The two wagon unloaders ordered from China are for the new Huanghua coal terminal approximately 300 kilometers south east of Peking which when complete will export 40 million tons of coal per year. Krupp Fördertechnik is supplying two tandem tipplers which will each unload 4,000 tons of coal an hour with a maximum capacity of 4,500 tons per hour. Each is based on a cylindrical tippler in which two wagons are hydraulically located and turned through 180 degrees. The tipplers have a C-shaped frame open at one side which allows the wagon pusher to travel right through the tippler. The tipplers will each simultaneously unload two rail freight wagons weighing 2x 84 tons at a rate of up to 33 cycles per hour. The two systems are also equipped with an indexer to position the wagons exactly, wagon weighing bridges, hopper discharge feeders and dust control systems. The tipplers are controlled by a PLC system and the AC drives are equipped with frequency converters.

The tandem tippler Krupp Fördertechnik supplied to Brazil has a diameter of 9.6 meters, a capacity of 240 tons and a length of 20 meters. It has the highest unloading capacity of any tippler yet built by Krupp Fördertechnik. It unloads up to 80 wagons an hour containing a total of 8,000 tons of iron ore at the port of Sepetiba, approximately 80 kilometers south west of Rio de Janeiro. The drive for the tippler has a capacity of around 210 kilowatts. The unloading cycle for two wagons takes only 42 seconds. Another 48 seconds are needed by a 1,000 kilonewton strong side arm puller to pull the complete freight train two wagons lengths forward. The iron ore is supplied to Sepetiba in trains consisting of up to 130 wagons and four locomotives and carrying up to 16,320 tons. Installation and commissioning of the unloader took around four months. The work was carried out by a Brazilian subcontractor under the supervision of a chief engineer from Krupp Fördertechnik.

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