Screw-type ship unloader preferred on environmental grounds

Cargotec Coal Unloader A similar Cargotec coal unloader to the one ordered for Brazil shown operating in Taiwan

At the end of last year Cargotec received an order for a Siwertell ST 940-D continuous ship unloader from the Ministry of Infrastructure (SEINFRA) in Ceará State, north-east Brazil. Fabricated in Sweden and China, the screw-type unloader will be installed at the Port of Pecem and is scheduled to be operational by end of 2011.

A decision on an order for a second, similar unloader for the same jetty is expected to be taken next year. With a discharge capacity of 2400t/h, the Siwertell will unload coal from partly laden Capesize vessels of up to 100,000dwt. Douglas Wichers, Cargotec’s sales manager for bulk terminals, said there were several reasons why SEINFRA opted for a Siwertell unloader. “In the first place,” he said, “it is the most environmentally friendly unloading system on the market as there are no dust emissions or spillages. It has the highest average unloading capacity when compared with competitive systems, yet the unit weight of the Siwertell unloader is only about half that of a grab crane, so there is no need to reinforce the jetty prior to installation. The small physical size of the Siwertell unloader eliminates the risk of collision with the large clamshell grab cranes that are to be installed at the same jetty.” Cargotec is currently processing orders for other Siwertell unloaders scheduled to be delivered in 2011 and 2012. These include another machine for Brazil, one for Taiwan and another for Korea.

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