Electrical Engineering of Arc Furnaces

Directed by

Prof. Dr.-Ing. Klaus Krüger, Ingenieurbüro Klaus Krüger

Content

• Importance of the EAF in hydrogen concepts  
• Physics of AC and DC arcs  
• Design of the AC high-current system  
• Equivalent circuit diagram of AC-EAF/OBF/SAF  
• Short circuit and operating reactance  
• Design of the AC high-current system  
• Power supply of EAF and requirements for the supply network  
• Excursus: New energy supply concepts for the EAF  
• Furnace Transformers  
• Circle and furnace power diagram of AC-EAF  
• Electrical Layout of AC Furnaces  
• Melting of DRI and HBI in the EAF  
• Design and electrical system of the OBF/SAF  
• Comparison of CO2 neutral routes: DR - EAF versus DR - OBF - Converter  
• Closed loop power control of AC-furnaces  
• Electric principles of DC-furnaces  
• Energy Balance of the Electric Arc Furnace  
• Comparism EAF-OBF/Smelter