Maximum process reliability in closed casting

Precise knowledge of the powder layer thickness enables more accurate monitoring of the real liquid steel level in closed systems. This, in turn, allows for the exact dosing of powder via an automatic feeder, maintaining a consistent powder layer and reducing the need for manual intervention in hazardous working areas. The detector additionally uses silicon photomultiplier (SiPM) technology to ensure maximum robustness against
interference from nearby electromagnetic stirrers and brakes, while providing outstanding temperature stability.

 

Customer benefits

  • One device, two signals (steel and powder)
  • Constant highest steel quality
  • High reliability under extreme process conditions
  • Low maintenance
  • Easy retrofit of LB 6752 and LB 6652 without mechanical adaptations
  • Robust against environmental influences like electromagnetic stirrers and brakes, high temperature, mechanical shock
  • Compatible with LB 452

Technical features

  • 10 sensors within one housing
  • Cycle time steel level: 5 ms
  • Cycle time powder level: 250 ms
     
  • Communication of LB 452 with PLC
    - Current output via 4…20 mA
    - Profibus
    - ProfiNET

Radiometric measurement for steel and powder levels

Redefining industry standards

Berthold Technologies, in collaboration with SMS Concast, has developed the state-of-the-art LB 6755 CONGAUGE detector. By combining ten scintillation crystals with an advanced software algorithm, the device can accurately distinguish the true casting level of molten steel from the thickness of the casting powder layer – all within a single unit. The separate output of the powder signal enables precise monitoring of the powder thickness and an evenly dosing of the powder.

The precise monitoring and control of casting powder thickness is beneficial for customers in the following ways:

✦ Reduced number of breakouts
✦ High stability of mold level accuracy
✦ Improved steel quality level
✦ Process automation by integration of automated powder feeder

Whitepaper

Measuring the steel level in continuous casting

Radiometric based mould level measurement is the dominating technology for measuring the steel level in continuous casting. Herein we discuss performance, statistical variation, influencing factors, source selection, and a recent development that enables the simultaneous measurement of casting powder layer thickness.

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