Electric Arc Furnace at Georgsmarienhütte

PlantTemp – Plant wide control of steel bath temperature

Initial Situation

  • The aim of steel bath temperature control is to prepare the melt such that it meets the target temperature at casting.
  • In electric arc furnace and ladle furnace steel melt is superheated, to built up a temperature buffer.
  • During subsequent treatment steps such as vacuum degassing, fine alloying, and soft stirring the excess temperature buffer is reduced.
  • The operator has to balance energy input with the expected dynamic energy losses based on his experience.

Working topics

  • A current spot measurement procedure of steel melt temperature is assessed by continuous fibre optical temperature measurements during case studies.
  • A dynamic process model is applied for through process temperature control.
  • An operator advisory system is implemented for optimized through-process temperature monitoring and control.
  • The advisory system gives operational advice regarding appropriate measurement procedures and optimises control set-points for the operation during the remaining treatment time.

Results

  • Supporting the operator in through-process temperature control
  • Improved accuracy in meeting the target casting temperature
  • Optimised resource efficiency with reduced electric energy consumption
  • Less variation of casting speed, improved surface quality

MeltCon
TotOptLis
DynStir

Recommendation

OptiBlaFIns – Analysis of blast furnace hearth state

Initial situation: bad hearth condition influences energy consumption, operational stability, hot metal quality and productivity. from earlier research projects offline […]

PowGETEG – TEG for high temperature waste heat recovery

Initial situation: Industries involve a huge amount of energy demand. A considerable amount of this energy is lost and escapes […]

NEBS – Use of waste heat for electricity generation using ORC

Initial situation: In the iron and steel industry as well as other energy-intensive industries, a variety of different thermal process […]

BOFdePhos – Control of Dephosphorisation in BOF process

Initial situation: End-point control of the Oxygen Steelmaking Converter (BOF) process is mainly based on results of a static charge […]