Title

STEEL EXPERT TAKES COMMAND – OPTIMIZED PERFORMANCE ON BOF CONVERTER

STEEL EXPERT TAKES COMMAND – OPTIMIZED PERFORMANCE ON BOF CONVERTER

Authorship

Hofinger, Stephan; Hubmer, Rudolf; Schütt, Stephanie

Hofinger, Stephan

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Hubmer, Rudolf

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Schütt, Stephanie

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DOI

10.5151/2594-5335-22654

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Abstract

The Steel Expert process model package for BOF converter comprises dynamic process guidance, a prediction model for simulation of the complete BOF production process and a number of setpoint models for the different production steps. This paper compares the achieved results from installations where the BOF melt shop is equipped either with a sublance, or an off-gas analyzing system, or both measurement systems. We will discuss the reproducible hitting ratios for temperature and carbon at end of blowing achieved for low carbon steel grades using sublance measurement and off-gas analysis for carbon prediction.The model performance in a steel plant using hot metal with high silicon content as input will be presented where a double slag practice with intermediate deslagging is applied. In another BOF shop we could demonstrate a considerable cost reduction of charge materials (e.g. scrap, fluxes, alloys) using all of the Steel Expert optimization features. Furthermore we will share additional benefits using the Steel Expert such as reduction of reblows for temperature and/or carbon, reduction of over blown heats and realization of a standardized and reproducible production practice.

The Steel Expert process model package for BOF converter comprises dynamic process guidance, a prediction model for simulation of the complete BOF production process and a number of setpoint models for the different production steps. This paper compares the achieved results from installations where the BOF melt shop is equipped either with a sublance, or an off-gas analyzing system, or both measurement systems. We will discuss the reproducible hitting ratios for temperature and carbon at end of blowing achieved for low carbon steel grades using sublance measurement and off-gas analysis for carbon prediction.The model performance in a steel plant using hot metal with high silicon content as input will be presented where a double slag practice with intermediate deslagging is applied. In another BOF shop we could demonstrate a considerable cost reduction of charge materials (e.g. scrap, fluxes, alloys) using all of the Steel Expert optimization features. Furthermore we will share additional benefits using the Steel Expert such as reduction of reblows for temperature and/or carbon, reduction of over blown heats and realization of a standardized and reproducible production practice.

Keywords

Basic oxygen furnace; Process optimization; Process models

Basic oxygen furnace; Process optimization; Process models