Apparatus for recovering zinc from residues

US4175027A · kind A · utility

Assignee

• Societe d'Etudes pour la Recuperation Electrolytique du Zinc · FR

Inventors

• Jean-Claude Catonne · La Celle-Saint-Cloud, FR
• Jean Royon · Ancenis, FR
• Maurice Bonnemay · Boulogne, FR
• Marie-Therese Descarsin · Paris, FR
• Marcel Bernard-Maugiron · Les Mureaux, FR
• Henri Fencki · Caudry, FR
• Jean Fayolle · Bertry, FR

Key dates

• Filing date: Sep 9, 1977
• Grant date: Nov 20, 1979
• Expiry date: Sep 9, 1997

Classification

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

Abstract

In a process for recovering zinc from residues containing it, particularly rom ashes and hard-spelters coming from galvanizing baths, and which comprises the extraction by electrolysis of the zinc contained in the alkaline or acid solutions obtained. The solutions deriving from the ashes are obtained by dissolving their relatively low metallic zinc content granulometric fraction, the high metallic zinc content granulometric fraction of these ashes being re-introduced directly into the galvanizing bath advantageously after a leaching treatment and the solutions deriving from the hard-spelters are obtained by dissolving them either by having recourse to a corrosion cell or by forming by means of these hard-spelters the anodes of an electrolysis circuit.