Direct-current arc furnace comprising a centric charging shaft for producing steel and a method therefor

US6490312B1 · kind B1 · utility

Assignee

• SMS Schloemann-Siemag Aktiengesellschaft · DE

Inventors

• Fritz-Peter Pleschiutschnigg · Düsseldorf, DE
• Wei-Ping Wu · Erkrath, DE

Key dates

• Filing date: Apr 4, 2001
• Grant date: Dec 3, 2002
• Expiry date: Apr 4, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/20
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A direct-current arc furnace for producing steel has a smelting vessel with electrodes, tapping openings for the molten mass and slag, and a device for a direct removal of exhaust gases. The smelting vessel is extended upwardly by a central shaft for introducing melt-down material into the vessel. The extension of the central shaft forms a melt-down material column. A shaft suction device is provided as an extension of the shaft for removal of the exhaust gases during the smelting process. Adjacent to the shaft openings are provided in the upper part of the smelting vessel for receiving a vessel suction device for dust and/or gases resulting during the charging process of the melt-down material. The shaft suction device and the vessel suction device are connected to a common device and switching elements are provided for actuating only one suction device and/or adjusting a combination of the exhaust gas flows dependent on the charging and smelting process.