Capital Equipment News

The HS 8300 HD from Liebherr, said to be one of the world’s largest duty cycle crawler cranes, is presently carrying out dredging work in Piombino. The aim of the project is to remove deposited sediment from the mouth of the port and also to increase the depth of the water. For this purpose the hybrid duty cycle crawler crane is equipped with a hydraulic clamshell grab with a filling capacity of 22 m³.

With its capacity of 300 t, the HS 8300 HD from Liebherr is one of the largest duty cycle crawler cranes worldwide. Since this summer the powerhouse is carrying out dredging work in the Port of Piombino. In recent years the depth of the water at the mouth of the port has been reduced to as little as 8 m through sediment.

liebherr HS 8300 HD dredging piombino 1

The work not only involves the removal of the sediment. The depth of the water will also be increased to 14 m in order to allow for larger vessels to run into the port. The importance of trouble-free shipping traffic is underlined by the fact that more than 3 million passengers per year pass through the port on their way to the Tuscan Archipelago, Sardinia or Corsica. The work in Piombino is being carried out in a six-month project by Italian dredging specialist Zeta S.r.l.

Material amounting to a total of 600 000 m³ must be removed from the entrance to the port. With the HS 8300 HD duty cycle crawler crane, Zeta S.r.l. found a real powerhouse and a suitable solution for the dredging project. On the one hand, the challenge lies in achieving high levels of turnover and, on the other hand, in removing not only sediment but also larger stones. For this reason Zeta S.r.l. opted for a hydraulic clamshell grab from Italian manufacturer Rossi with a filling capacity of 22 m³.

Zeta S.r.l. has installed the HS 8300 HD without crawlers on its new dredger Maria Vittoria Z, on which a total of 3 000 t of material can be loaded. Thanks to the large volume of the grab and also the short working cycles of only 45 seconds, the Liebherr duty cycle crawler crane handles 2 000 t of material per hour, meaning it requires less than two hours to fully load the Maria Vittoria Z. Close by, the dredged material is being gainfully used for the expansion of the Port of Piombino. The dredger is loaded and unloaded by the HS 8300 HD up to four times each working day between 05:00 am and 20:00 pm.

The duty cycle crawler crane is equipped with Liebherr’s own hydraulic hybrid drive system, Pactronic. Through the storage and subsequent reactivation of surplus energy, turnover can be increased and, at the same time, fuel consumption can be significantly reduced. In combination with Pactronic the 725-kW diesel motor achieves a system performance that is comparable to a conventional drive system with 1 250 kW.

Despite high levels of turnover the duty cycle crawler crane has up to 50% lower diesel consumption (60 l/h) in comparison to similar models. A further important advantage of the Pactronic system is its reduced noise emission, which is of significant importance for machines operating in residential areas.

Both the machine operator as well as Mauro Boscolo, CEO of the contractor Zeta S.r.l., are delighted with the environmental and economic advantages. “Double the turnover but with 60 l/h only half the diesel consumption.”

Contact Capital Equipment News

Title: Editor
Name: Munesu Shoko
Email: capnews@crown.co.za
Phone: +27 11 622-4770
Fax: +27 11 615-6108

Title: Advertising Manager
Name: Elmarie Stonell
Email: elmaries@crown.co.za
Phone: +27 11 622-4770
Fax: +27 11 615-6108

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