Flexible minimum energy utilization electric arc furnace system and processes for making steel products

摘要

In an electric arc furnace system for making steel, a method and structure (1) for eliminating teeming hang-ups and ensuring temperature homogeneity in a ladle which teems into an ingot mold by gas purging at all possible steps under both atmospheric and vacuum conditions, and (2) for preventing non-metallic inclusions from appearing in the final product by deflecting the granular material in the teeming ladle well block away from the ingot mold by a heat resistant but combustible deflector just prior to entry of the teeming stream into the ingot mold.

主权项

1. In a multi-station system for producing very pure alloy steel, said system having a single electric arc furnace, a ladle metallurgical furnace and vacuum degassing means, a method comprising the steps of
providing receptacle means for receiving a heat from the electric furnace, passing an inert gas upwardly through the heat as the heat is tapped from the electric furnace into the receptacle means, moving the heat which has been subjected to the inert gas during tapping to the ladle metallurgical furnace, passing an inert gas upwardly through the heat while said heat is subjected to treatment in the ladle metallurgical furnace, and thereafter, following ladle metallurgical furnace treatment of the heat, subjecting the heat to the combined effect of vacuum and an inert gas in the vacuum degassing means, and thereafter teeming the heat.