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Real-time and Contactless Mold Thermal Monitoring: Improving Metallurgy, Quality and Productivity of Billets and Blooms

Echtzeit- und kontaktlose thermale Überwachung des Kokillenrohrs: Verbesserung der Metallurgie, Qualität und Produktivität von Knüppeln

Abstract

Today the mold thermal mapping technology is typically applied to the CCMs for slabs with solutions based on the installation of thermocouples (TC) or optical fibre cables (OFC), inserted into channels machined in the plate molds. The final installation is complex, since every single mold must be machined and the quantity of cables is considerable, making every mold change a complex and time-consuming activity. Extending TC or OFC application to billets and blooms would require invasive and expensive CNC machining of the curved mold tubes.

In order to overcome these limits, Ergolines designed a new system based on contactless ultrasound technology which provides the real-time mold thermal map without the need to machine the copper, offering a new reliable tool also to the CCMs for small sections. By providing real-time data of the thermal distribution of the mold, Ergolines’ system can be fruitfully used by the technical personnel to improve the casting practice, the steel quality and the plant productivity.

Zusammenfassung

Heutzutage wird die Thermale Überwachung des Kokillenrohrs normalerweise auf das Brammenstranggießen angewandt, um die Wärmeübertragung durch Kupfer mit Thermoelementen oder Optical Fibre Cables (OFC) zu überwachen. Diese Sonde wird gewöhnlich im Kupferkokillenrohr durch teure maschinelle Bearbeitung installiert. Die Installation ist ziemlich kompliziert und zeitintensiv. Aus diesem Grund wäre eine unpraktische, teure Bearbeitung des Kupfers notwendig, um Thermoelemente oder OFC für die Knüppel zu verwenden. Ergolines hat einen neuen Ultraschall-Sensor entwickelt, der keine Bearbeitung des Kupferkokillenrohrs braucht: Durch diese Technologie ist es jetzt möglich, die thermale Überwachung des Kokillenrohrs in Echtzeit kontaktlos zu überwachen. Die Echtzeit-Daten von Ergolines Ultraschall-Sensor liefern wichtige Informationen über die Kupferwärmeübertragung, die sehr nützlich für die Verbesserung der Metallurgie, der Qualität und der Produktivität sind.

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Correspondence to I. Mazza.

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Mazza, I., Miani, S., Schiavon, G. et al. Real-time and Contactless Mold Thermal Monitoring: Improving Metallurgy, Quality and Productivity of Billets and Blooms. Berg Huettenmaenn Monatsh 165, 11–18 (2020). https://doi.org/10.1007/s00501-019-00940-8

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Keywords

  • Initial solidification
  • Stainless steel solidification
  • Mold thermal mapping
  • Breakout prevention
  • Mold powder feeding control
  • Ultrasonic sensor

Schlüsselwörter

  • Stahlerstarrung
  • Thermale Überwachung des Kokillenrohrs
  • Breakout-Vorbeugung
  • Kokillenrohr-Pulver-Überwachung
  • Ultraschallsensor