TECHNOLOGY REPORT | PROCESS CRANES
disruption to traffic; the two bridge beams were 4m high by 3m wide and entailed a convoy length of 70m, which had to negotiate roundabouts and intersections. At Aken they were transferred to a fleet of three barges for a five-day journey on the Rhine to Duisberg. They were unloaded by a specially- installed lattice mast crane; pre-assembly on the ground began on time on May 2. After four weeks, in early June, the crane will be lifted onto a purpose-built crane runway extension outside the casting hall and completed there. In order to reach its position as the
central crane, it must pass under the first crane – which will be lifted out of the way by two crawler cranes. So as Thomas Lehmann, marketing manager of Kranbau Köthen puts it, the project “is still exciting.” Spanish crane-makers Jaso have been
similarly involved recently with steel producers ArcelMittor – in their case, twice over. The first crane ordered was for handling liquid steel. It was installed in August 2019 and is already working at full capacity as a strategic piece of equipment in the manufacture of steel sections on the ArcelorMittal Differdange European
production site in Luxembourg. The crane has four girders and two winches. The main winch has a lifting capacity of 250 tonnes and moves along the external girders with a span of 20 metres. The auxiliary winch moves along the internal girders and has two hoists—a 50-tonne one that allows the tipping of the ladle to pour steel and a 5-tonne one for maintenance activities. The crane was manufactured on the
Jaso premises using 275 tonnes of steel with the S275JR and S355J2+N grades, with thicknesses ranging between 10, 15 and 20 millimetres.
The success of the order led directly, within the space of 18 months, to a second collaboration with ArcelorMittel, this time to replace a crane at its distribution centre in Basauri, south of Bilbao. This is for a double girder overhead crane with rotating trolley and a load capacity of up to 20 tonnes; a happy symbiosis is that this crane was partly manufactured from ArcelorMittal’s own steel. “It is an interesting win-win collaboration,” says marketing manager Antonio Naranja, “as Distribución Iberia [ArcelorMittel’s Spanish distribution operation] is both our customer and
supplier, and JASO in turn is both supplier and customer.” “So Jaso Industrial Cranes relies on the
steel of Distribución Iberia and Distribución Iberia relies on Jaso Industrial Cranes to provide equipment with maximum efficiency and safety. “The new crane has led to an
improvement in the process; it now incorporates a permanent magnet that allows a 90-degree turn of the material being handled. It has also increased efficiency in transporting of loads: the obsolete crane had a load capacity of 10 tonnes, while the new one can handle up to 20 tonnes. The process has also been improved in terms of safety, as all movements can now be carried out with a single remote control.” As processes become more complex and more interdependent, the systems that control them become ever more dependent on real-time data collection and intelligent software to analyse that data. The process crane is now embedded in that system and can contain and be a source of that all-controlling software. It has come a long way from being just a steel beam with a hook hanging from it. ●
R Jaso’s process crane at ArcelorMittel Basauri. Photo courtesy ArcelorMittel
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