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1. WO2011120093 - RECOVERING METALS FROM PICKLE LIQUOR

Publication Number WO/2011/120093
Publication Date 06.10.2011
International Application No. PCT/AU2011/000368
International Filing Date 30.03.2011
IPC
C23G 1/36 2006.1
CCHEMISTRY; METALLURGY
23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
1Cleaning or pickling metallic material with solutions or molten salts
36Regeneration of waste pickling liquors
CPC
C22B 19/26
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
19Obtaining zinc or zinc oxide
20Obtaining zinc otherwise than by distilling
26Refining solutions containing zinc values, e.g. obtained by leaching zinc ores
C22B 3/44
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
3Extraction of metal compounds from ores or concentrates by wet processes
20Treatment or purification of solutions, e.g. obtained by leaching
44by chemical processes
C22B 7/006
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
7Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; ; Methods of a general interest or applied to the winning of more than two metals
006Wet processes
C23G 1/36
CCHEMISTRY; METALLURGY
23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
GCLEANING OR DEGREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
1Cleaning or pickling metallic material with solutions or molten salts
36Regeneration of waste pickling liquors
Y02P 10/20
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
10Technologies related to metal processing
20Recycling
Applicants
  • INTEC LTD [AU]/[AU] (AllExceptUS)
  • TONG, Andrew [AU]/[AU] (UsOnly)
  • VALENCIA-BEJARANO, Maritza [AU]/[AU] (UsOnly)
Inventors
  • TONG, Andrew
  • VALENCIA-BEJARANO, Maritza
Agents
  • GRIFFITH HACK
Priority Data
201090133930.03.2010AU
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) RECOVERING METALS FROM PICKLE LIQUOR
(FR) RÉCUPÉRATION DE MÉTAUX À PARTIR D'UNE LIQUEUR DE DÉCAPAGE
Abstract
(EN) A process for recovering zinc from pickle liquor is disclosed. The process comprises: (i) passing the liquor to an iron recovery stage in which iron present in the liquor is separated from the liquor; (ii) passing the iron-depleted liquor to an electrolysis stage in which zinc present in the liquor is electro-recovered; and (iii) passing the zinc-depleted liquor to a separate acid regeneration stage in which the pickle liquor is regenerated. This allows for recovery of ferric oxide and zinc, both saleable products. When the regenerated acid is recycled to the galvanizing process, the present process approaches zero waste.
(FR) L'invention concerne un procédé de récupération de zinc à partir d'une liqueur de décapage. Le procédé consiste à : (i) soumettre la liqueur à une étape de récupération de fer dans laquelle le fer présent dans la liqueur est séparé de celle-ci ; (ii) soumettre la liqueur épuisée en fer à une étape d'électrolyse dans laquelle le zinc présent dans la liqueur est récupéré électrolytiquement ; et (iii) soumettre la liqueur épuisée en zinc à une étape de régénération d'acide distincte dans laquelle la liqueur de décapage est régénérée. Ce procédé permet de récupérer de l'oxyde ferrique et du zinc, deux produits commercialisables. Quand l'acide régénéré est recyclé dans le procédé de galvanisation, le présent procédé se rapproche du zéro déchet.
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