Primetals Technologies receives final acceptance from Feralpi

Elbe-Stahlwerke Feralpi GmbH (ESF), a German steel producer and part of the Feralpi Group, has issued the final acceptance certificate for a modernized, five-strand continuous billet caster in its Riesa plant. Primetals Technologies received the order in May 2014.

The aims of the project were to improve the internal and surface qualities of the billets, and to increase the production capacity by 20 percent. This was achieved by installing a new machine head, which included DiaMold molds and a retractable DynaFlex oscillator, as well as by optimizing the secondary cooling. The new plant has a modular design, and was pre-assembled to keep installation and downtimes short.The five-strand continuous billet caster owned by ESF in Riesa was installed in 1994 by a third-party supplier. It had an annual production capacity of around one million metric tons of billets with square cross-sections of 130x130, 140x140 and 160x160 millimeters. The plant has a machine radius of six meters and reaches casting speeds of up to 3.8 meters per minute. It casts low and medium-carbon steels, which are further processed in a wire rod mill in the Riesa plant. Retractable DynaFlex mold oscillators were installed to increase capacity. This solution enables the mold on a strand to be exchanged without interrupting the casting process, increasing both the productivity and the flexibility of the casting plant. All mechanical connections are released hydraulically at the touch of a button. The complete machine head, including mold and oscillator, is moved from the casting position to the maintenance position on a mobile platform. The time between stopping and restarting the strand to change a mold is between just 15 and 20 minutes.

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