Due to the high heating power of the electric arc furnace, precise end point control of the EAF refining process is essential for efficient melt processing. The evolution of the steel bath temperature was measured during the EAF refining phase using a novel fibre optical measurement system based...

The project aims to set up a methodology to manage the electric arc furnace(EAF) charged with the variable materials mix guaranteeing the required steel quality, minimising the cost to produce crude steel and the environmental impact, having in mind the volatility of scrap quality/price ratio...

Control of slag foaming in the BOF has always been problematic. With increased pressure on process yields and productivity, combined with increased demands for accurate control of refining it is important to develop a process control tool that can consistently achieve the optimum performance...

The objective of the project was to improve deslagging processes during two process steps of liquid steelmaking by applying image sensors and process models to control deslagging operations. The two process steps that were investigated are: after hot metal desulphurisation at SSAB EMEA AB,...

The main topic of this project was the combination of rule-based methods like failure mode and effect analysis (FMEA) or anticipatory failure determination (AFD) with data-based methods. The overall aim was to improve quality management in the cold rolling and finishing area and thus improve...

Due to the high heating power of the electric arc furnace, precise end point control of the EAF refining process is essential for efficient melt processing. The evolution of the steel bath temperature was measured during the EAF refining phase using a novel fibre optical measurement system based...

For control of carbon and nitrogen content during AOD treatment, dynamic models based on thermodynamics and reaction kinetics were developed and verified with data from three different AOD plants. The effect of the melt temperature on the equilibrium conditions for decarburisation and...

Additional oxygen supply via an RH top lance is mainly used for forced decarburisation in case of a lack of dissolved oxygen, and for chemical heating. To develop a dynamic control system for lance oxygen input, existing RH process models of BFI and IRSID were extended to the effect of oxygen...

The main aim of this project was the definition of the metallurgical and economical limits of a vacuum treatment applied to steels produced via EAF and scrap in order to reduce the nitrogen and sulphur content to below 50 and 20 ppm respectively, and to simulate this treatment by a dynamic...

Vacuum treatment is the most utilised process for the production of quality steel with strict demands on cleanliness and low contents of hydrogen, nitrogen and sulphur. To improve the process performance and to develop new process-control functions, collaborative research between MEFOS, BFI,...