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Bucket wheel excavators and bucket chain excavators take jobs that were previously accomplished by rope shovels and draglines. They have been replaced in most applications by hydraulic excavators , but still remain in use for very large-scale operations, where they can be used for the transfer of loose materials or the excavation of soft to ...
The bucket-wheel itself is over 21.3 metres (70 feet) in diameter with 18 buckets, each of which can hold over 15 cubic metres (530 cubic feet) of material. It can move 240,000 m 3 (8,500,000 cu ft) [ 6 ] or [ clarification needed ] 218,880 tonnes of soil per day (the same as Bagger 288).
The bucket-wheel dimensions are 11.2 m (37 ft) in diameter with 14 buckets. [7] It is able to excavate a total capacity that can range between 4900 and 7000 m 3 /h with a digging force of around 100 kN/m. [7] [8] The bucket wheel excavator reaches 30 m digging height with a cutting depth of -10 meters. [5]
The bucket wheel excavator had a power of 5555 kW during operation and was supplied with a 6 kV power cable. Overall, the bucket wheel excavator is about 50 meters high and about 171.5 meters long. The six-section crawler undercarriage, with a maximum travel speed of 6 meters per minute, carries the total mass of 3850 tons. [4]
Bagger 288 (Excavator 288), previously known as the MAN TAKRAF RB288 [2] built by the German company Krupp for the energy and mining firm Rheinbraun, is a bucket-wheel excavator or mobile strip mining machine. When its construction was completed in 1978, Bagger 288 superseded Big Muskie as the heaviest land vehicle in the world, at 13,500 tons. [3]
A large conveyor bridge with 200 m span and 50 m height, fed by a bucket-wheel excavator, was completed in 1930 in the Böhlen lignite mine. After it was toppled by a storm in 1937, a replacement went into service in 1939. [2]
At the Spandau factory, O&K built cable-operated excavators and bucket-wheel excavators for use in the lignite coal mines of eastern Germany. Under the Aryanisation scheme of Adolf Hitler 's Nazi Germany, the Orenstein family's shares in the company were forcibly sold in 1935; Orenstein and Koppel was placed under trust administration, and the ...
Since 1995, the giant bucket-wheel excavator Bagger 293 is used to remove the overburden. It holds several Guinness records for terrestrial vehicles. The open-cast mine annually produces a spoil amount of 250 to 300 million m³. The ratio of overburden to coal is 6.2:1.