Process for the production of ferrochromium

US4629506A · kind A · utility

Assignee

• Fried.Krupp Gesellschaft mit beschraankter Haftung · DE

Inventors

• Klaus Ulrich · Heiligenhaus, DE
• Wilhelm Janssen · Saterland, DE
• Dieter Neuschuetz · Essen, DE
• Thomas Hoster · Kaiserslautern, DE
• Hermann Doerr · Wiesloch, DE
• Dietrich Radke

Key dates

• Filing date: Dec 20, 1984
• Grant date: Dec 16, 1986
• Expiry date: Dec 20, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22B34/32
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A process for the production of ferrochromium from iron-containing chromium ores, in which the reduction of the ore, which is mixed with coal and slag-forming constituents, is conducted in a rotary kiln at 1480.degree. to 1580.degree. C. in the presence of a CO-containing atmosphere from 20 to 240 minutes, and in which melting follows in a melting furnace at 1600.degree. to 1700.degree. C. By this process, the greatest part of the gangue of the ore can be separated off before melting the reduced ore.