Method for separating non-ferrous metals from ferruginous secondary substances

US4491470A · kind A · utility

Assignee

• Klockner-Humboldt-Deutz AG · DE

Inventors

• Hermann Hilbrans · Langenfeld, DE
• Chatty Rao · Bensberg, DE

Key dates

• Filing date: May 4, 1983
• Grant date: Jan 1, 1985
• Expiry date: May 4, 2003

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S75/961
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for separating non-ferrous metals from ferruginous secondary substances such as residues and slurries from blast furnaces, steel mills, rolling mills, and the like. In accordance with the invention, a layer of the secondary substances is combined in agglomerated form with at least one layer of a sinterable mixture. The non-ferrous metals are volatilized off and recovered in the form of an oxide dust. The recovered dust is separated into at least two fractions having different non-ferrous metal contents and then the dust fractions are sintered with the sinterable mixture.