Process of producing sponge iron by a direct reduction of iron oxide-containing materials

US4443250A · kind A · utility

Assignee

• Metallgesellschaft AG · DE

Inventors

• Kurt Meyer · Arlington Heights, US
• Lothar Reh · Zumikon, CH
• Martin Hirsch · Friedrichsdorf, DE
• Wolfram Schnabel · Idstein, DE
• Harry Serbent · Hanau, DE

Key dates

• Filing date: Sep 14, 1982
• Grant date: Apr 17, 1984
• Expiry date: Sep 14, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21B13/146
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Fine-grained material which contains iron oxide is prereduced in a fluidized bed and is subsequently completely reduced in a rotary kiln. In order to avoid agglomeration and incrustation in the rotary kiln, the prereduction is carried out to effect a metallization of 50 to 80%.