Prototyp online concentration analysis system test installation at strip pickling line

MACO Pilot – Optimisation of the mixed-acid online monitoring and control in stainless steel pickling plants

Initial situation

  • Economic pressure on European steel sector demands high flexible and favourable production
  • Especially the pickling step is of high importance for stainless steel production
  • High process flexibility needs a fast adjustment of defined concentrations in industrial mixed-acid pickling baths for achieving consistently high product qualities and plant productivity.
  • Within the RFCS project FLEXPROMUS an innovative method for continuous HF-HNO3-mixed-acid online analysis was successfully developed
  • First prototype tests at stainless steel strip pickling lines showed very promising results

 

Project objectives

  • Optimisation of online-measuring-technique for continuous concentration monitoring in HNO3-HF-mixed acids
  • Optimisation of concentration monitoring and control at stainless steel pickling facilities
  • Online-measuring technique prototype test installations at stainless steel strip and wire rod pickling plants and acid regeneration plant

 

Innovative process approaches

  • Continuous online-concentration monitoring of mixed acid pickling solutions by means of model based measuring technique
  • Development of a „closed loop“-concentration control model for stainless steel strip pickling lines on basis of online-concentration data
  • Development of a pickling programme management model for wire-rod pickling plants
  • Concept development for improvement of existing European mixed acid pickling plants by online monitoring and control

 

Current results (as of 12/2017)

  • Further optimisation of online-concentration measuring system set-up
  • Database enhancement for online concentration calculation model
  • Realisation of operational prototype online-measuring system installations
  • Development of „closed-loop“-concentration control model for strip pickling line

 

Outlook

  • Operational testing and further optimisation of prototype online-measuring system installations at stainless pickling plants
  • Test and optimisation of the „closed-loop“ concentration control model
  • Development and testing of pickling-programme management model for wire-rod pickling plants

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