Process of making steel by melting sponge iron in an electric arc furnace

US4490168A · kind A · utility

Assignees

• Metallgesellschaft AG · DE
• Mannesmann AG · DE

Inventors

• Lothar Formanek · Frankfurt am Main, DE
• Martin Hirsch · Friedrichsdorf, DE
• Wolfram Schnabel · Idstein, DE
• Harry Serbent · Hanau, DE
• Klaus-Dietrich Fritzsche · Oberhausen, DE
• Heribert Koenig · Duisburg, DE
• Detmar Arlt · Duisburg, DE

Key dates

• Filing date: Jan 11, 1984
• Grant date: Dec 25, 1984
• Expiry date: Jan 11, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21B13/12
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Sponge iron produced by direct reduction is melted in an electric arc furnace, in which a pool of liquid metal is maintained. To ensure that liquid carbon-containing iron for forming the pool is available in adequate quantities and that the process can be carried out with the highest possible economy, the sponge iron is reacted in an electric arc furnace on a bath of liquid carbon-containing iron (hot metal), which has been produced from sponge iron or from partly reduced ore in an electric reducing furnace, and in dependence on the electric load changes which are due to the operation of the electric arc furnace the operation of the electric reducing furnace is so controlled that a virtually constant load on the electric power supply system is maintained.