Prisma Impianti: galvanising modernization at Marcegaglia Ravenna
January 30, 2025Prisma Impianti, an industrial automation company based in Basaluzzo (Al), has obtained final acceptance for the project to modernize the cooling section on the ZIN/2 at the Marcegaglia plant in Ravenna. An intervention that, Prisma Impianti explains in a note, has improved the energy efficiency and productivity of the plant, “consolidating Prisma Impianti’s position in the realisation of cutting-edge technological solutions for the steel industry.”
This is the third cooling section to be modernised for Marcegaglia Ravenna and comes on top of other interventions: modernization of the cleaning section and supply of a new gas mixing station, also on ZIN/2; previous modernization of the cooling sections on ZIN/3 and ZIN/4; insertion of a new cleaning section and speed increase on ZIN/1.
“The collaboration between Prisma Impianti and Marcegaglia Ravenna,” comments CEO Manuel Alfonso, “has deep roots, with a history of success that testifies to the Marcegaglia Group’s concrete commitment to continuous improvement and reducing the environmental footprint of its production processes.”
The ZIN/2 line, recalls the industrial automation company, produces galvanised steel coils with thicknesses varying between 0.25 and 1.5 mm, widths between 850 and 1550 mm and a maximum process speed of 200 m/min. “At the heart of the project,” the note goes on to say, “is our advanced mathematical model for optimising the cooling process, which guarantees excellent results. Among the activities completed replacement of 8 air coolers with units complete with new fans and cooling boxes, featuring an evolution in the design of the cooling air distribution compared to what Prisma had previously installed; creation of a new demi-water cooling section, including a tunnel with new cooling ramps, quench tank, wringers, air dryer, recirculation pumps and heat exchangers; installation of two new motors to drive the two top rolls located on the top of the cooling tower; replacement of the power centre, air cooler drive panel and furnace combustion air fans and remote I/O of the furnace before the galvanising tank; upgrading of the furnace and cooling tower control systems with the installation of new state-of-the-art Siemens failsafe CPUs.”
The intervention resulted in “an 18% reduction in the line’s overall energy consumption; a reduction of up to 90% in the cooling tower’s energy consumption; and full compliance with the required performance parameters, with target temperatures achieved of 240°C at the top roll, 160°C at the quench inlet, and 35°C at the outlet on the reference belt.”
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