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UNITED KINGDOM - Largest Rehandler for Scrap Yard [cont]
The Liebherr R984 C Litronic High-Rise industrial rehandler is a 210+ tonnes machine, powered by a Cummins QSK-19 C 750 six-cylinder engine which develops 504 kW.
Of particular interest is the newly developed heavy-duty undercarriage and high-rise support structure, which raises the machine by 8.70 m to the slew-ring and, with the fixed elevated cab, gives the operator a 12.90 m line of sight – particularly important for optimum load view when soft-loading bulk cargo vessels.
The tracks themselves provide total stability, with a footprint of approximately 8 m x 9.50 m and equipped with 750 mm wide cast steel flat track pads.
Catwalks are installed all round the upper tower and there are stairs to the lower platform and safe access to the upper carriage via operator-controlled electrically powered access gates, which are monitored by CCTV with an in-cab screen.
Special additional fuel tanks, extra to the 1,500 litre tank on the machine itself, have been integrated into the turret at ground level (2 x 3,000 litre) which allow the machine to run for up to 100 hours without refuelling.
Another feature specific to this machine is an access ladder which runs from the ground up through the turret to allow safe and easy internal inspection of the slew-ring.
An electric service crane is located on the counterweight and this is powered by its own separate diesel generator installed on the middle platform.
The air-conditioned, ergonomically designed, elevated operator’s cab is resiliently mounted, sound insulated and fitted with tinted windows. The driver’s seat is fully adjustable, with shock-absorbing suspension and headrest. Travel, slew and attachment operation is via twin joystick controls mounted into the seat armrests.
The Litronic system monitors hydraulics and engine performance, providing real-time operating conditions via an LCD display which keeps the operator fully informed at all times.
Additional dust filtration has been fitted for added operator comfort and safety and four extra working lights have been installed on the cabin roof – two forward and two rear.
Spillard CCTV cameras and in-cab monitors have been retro-fitted to give the operator a clear view of the undercarriage and a further camera is located on the stick to provide total vision of the grab and its load, even when lowered deep into a vessel’s hold. An automatic central greasing system takes care of upper carriage and attachment lubrication.
It was produced by Liebherr’s specialist dedicated materials handler manufacturing facilities which were recently opened in southern Germany.
In this configuration, lift height is a maximum 33.50 m and the optimum lowering depth below ground level is 9 m; hoist and stick cylinders have load-holding valves.
Sandvik Mining and Construction has successfully completed assembly of the compact bucket wheel excavator, including the beltwagon, for Mátra Kraftwerk G.AG in Hungary. After completing the detailed design and the fabrication of the main components, the assembly of the entire unit (compact bucket wheel excavator including beltwagon) started at the beginning of November. Assembly was conducted according to a demanding schedule of only eight months, with up to some 130 erectors working on the site every day.
The first extraction level of Bükkábrány opencast mine trial operations will commence on schedule at the end of June 2009 and both machines will begin normal operations as early as September. The new entire unit will increase production capacity and also raise productivity at the Bükkábrány opencast lignite mine.
The new bucket wheel excavator with a total weight of around 1,650 tons has a 28-meter boom on which the 12 m diameter bucket wheel is located. The power output of the bucket wheel alone, fitted with 16 buckets, is around 1,100 kW - the entire power output of the machine amounts to 3,200 kilowatt. The entire unit (compact bucket wheel excavator including beltwagon) is designed to generate a conveying output of around 6,700 lcm/h or an annual capacity of 12 million bank m³.
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