Scrap-melting electric arc furnace

US5835524A · kind A · utility

Assignee

• Voest-Alpine Industrieanlagenbau GmbH & Co. · AT

Inventors

• Harald Berger · Kelkheim, DE
• Peter Mittag · Linz, AT
• Heinrich Auberger · Walding, AT
• Peter Wimmer
• Johann Auer · St. Florian, AT
• Alfred Weber · Wien, AT
• Johannes Steins · Linz, AT

Key dates

• Filing date: Feb 28, 1996
• Grant date: Nov 10, 1998
• Expiry date: Feb 28, 2016

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F27B3/183
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

A scrap-melting electric arc furnace operating at an elevated melting power having a simple construction that also avoids thermal loads of the side wall caused by the electrodes. The electrodes are protected from damage during scrap-charging. The electric arc furnace includes a bottom for receiving a melt. An upper part rises from the bottom part and has side walls. A lid covers the upper part. A charging shaft is disposed approximately centrically relative to the upper part, and has a diameter that is substantially smaller than the diameter of the upper part. The charging shaft interior communicates with the furnace interior via an opening in the lid. Electrodes arranged approximately radially symmetrically are directed obliquely into the furnace interior and project toward the center of the electric arc furnace.