PROCESS FOR DE-ZINCING OF GALVANIZED STEEL SCRAP

The present invention relates to waste treatment and provides a process for depletion of zinc from Zn-coated Fe by subjecting the Zn-coated Fe to a leaching step in a waste-derived acidic solution comprising Fe3+ to provide an acidic solution containing Zn2+ and Fe2+; obtaining a metallic Fe substra...

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Bibliographische Detailangaben
1. Verfasser:	Auer, Gerhard
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL FERROUS OR NON-FERROUS ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MANUFACTURE OF IRON OR STEEL METALLURGY METALLURGY OF IRON MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The present invention relates to waste treatment and provides a process for depletion of zinc from Zn-coated Fe by subjecting the Zn-coated Fe to a leaching step in a waste-derived acidic solution comprising Fe3+ to provide an acidic solution containing Zn2+ and Fe2+; obtaining a metallic Fe substrate depleted from zinc; and separating Fe2+ from Zn2+ to provide a Zn2+-containing product and a Fe2+ salt.