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Schweizer Recyclingstahl-Hersteller: Modernisierung der Walzdrahtstraße
von Hubert Hunscheidt

Der Metallhersteller AFV Beltrame Stahl Gerlafingen hat Primetals Technologies kürzlich mit der Modernisierung seines Drahtwalzwerks in Gerlafingen, einer Stadt im Kanton Solothurn im Nordwesten der Schweiz, beauftragt. Zum Lieferumfang gehören eine intelligente Treiberrolle und ein Hochgeschwindigkeits-Windungsleger.
Produktionssteigerung
Diese Ausrüstung wird die Produktionsleistung verbessern, indem sie eine gleichmäßige Ausführung der Drahtcoils gewährleistet. Die verbesserte Drahtcoil-Konsistenz führt zu einer Vollauslastung des Aufwärmofens und erleichtert den anschließenden Transport. Die Inbetriebnahme der neuen intelligenten Treiberrolle- und Hochgeschwindigkeits-Windungslegereinheit wird im Sommer 2023 erwartet.
Minimierte Vibrationswerte
Die Walzdrahtstraße produziert 600.000 Tonnen Coils pro Jahr, während die Stabstahlstraße eine jährliche Kapazität von 80.000 Tonnen von Stabstahl hat. Beide Anlagenteile werden von der gleichen Grob- und Zwischenwalzstraße gespeist. Die Modernisierung der Anlage führt zu geringeren Vibrationswerten am Windungsleger und dadurch zu einem geringeren Verschleiß. Weiterhin erreicht AFV Beltrame Stahl Gerlafingen eine bessere Regelung der Drahtenden und -anfangspositionierung.
Elektrische Ausrüstung
Für die Treiberrolle und den Windungsleger werden neue Wechselstrommotoren geliefert. Die Motoren werden von leistungsstarken Niederspannungs-Frequenzumrichtern mit aktivem Front-End-Gleichrichter geregelt. Die technologische Regelung wird mit einer Simatic S7-1500 SPS-Steuerung realisiert.
Stahl Gerlafingen ist Teil der größeren AFV Beltrame Gruppe, Europas führendem Hersteller von Stabstahl. Das Unternehmen ist der grösste Produzent von Recyclingstahl in der Schweiz und produziert hauptsächlich Bewehrungsstähle für den nationalen und internationalen Markt.
Quelle und Foto: Primetals Technologies, Limited