DynStir – Dynamic stirring in secondary metallurgy

Initial situation:

  • Stirring is often carried out on the basis of static pre-set parameters, without regard to the changing metallurgical specifications between one heat and the next, and only monitored manually by operators.
  • This greatly limits the stability and repeatability of the stirring process as well as the possibility to adapt the process to the varying demands of individual steel heats.
  • Unnecessary long stirring is also less energy efficient.

Working topics:

  • Develop dynamic stirring policies in secondary steelmaking at different treatment stations (VD, CAS-OB, FT).
  • Monitor actual stirring by imaging systems, compare it to ideal treatment according to stirring policies and advise correct stirring accordingly.
  • Tailoring the stirring process to the individual need of each treated steel melt, based on metallurgical fundamentals.
  • Improve energy efficiency of the ladle stirring processes  while maintaining the cleanness of the final product.

Results:

  • Reduced process time, reduced Ar consumption, reduced temperature loss.
  • Stable process conditions  by detailed monitoring of stirring processes.

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