CA2846154C - Une methode de boucle fermee amelioree pour l'extraction d'or et d'argent par halogenes - Google Patents

Une methode de boucle fermee amelioree pour l'extraction d'or et d'argent par halogenes Download PDF

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Publication number
CA2846154C
CA2846154C CA2846154A CA2846154A CA2846154C CA 2846154 C CA2846154 C CA 2846154C CA 2846154 A CA2846154 A CA 2846154A CA 2846154 A CA2846154 A CA 2846154A CA 2846154 C CA2846154 C CA 2846154C
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Canada
Prior art keywords
brine
calcium hydroxide
halogens
ore
gold
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CA2846154A
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CA2846154A1 (fr
Inventor
Jean-Marc Lalancette
Bertrand Dubreuil
David Lemieux
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Dundee Sustainable Technologies Inc
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Dundee Sustainable Technologies Inc
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Priority to CA2846154A priority Critical patent/CA2846154C/fr
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00—Obtaining noble metals
    • C22B11/06—Chloridising
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/24—Halogens or compounds thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

CA 02846154 2014-10-30 J. ABRÉGÉ DE LA DIVULGATION Un procédé dextraction de métaux précieux à partir dun minerai polymétallique consiste à a) générer des hypochlorites à partir dune saumure; b) chlorer le minerai à laide dhypochlorites dans des conditions acides; c) filtrer pour collecter une liqueur mère et traiter la liqueur mère pour collecter les métaux précieux; d) filtrer pour séparer les métaux précieux et une saumure stérile; e) purifier la saumure stérile; et f) recycler les halogènes provenant de la saumure purifiée sous la forme dhypohalites formés par électrolyse de la saumure purifiée, et comprenant de lhypochlorite et de lhypobromite; létape b) consistant en outre à laver les halogènes en excès à laide dhydroxyde de calcium; le traitement de la liqueur mère de létape c) consistant à réduire un potentiel doxydoréduction de la liqueur mère et à utiliser lhydroxyde de calcium pour la neutralisation; et létape e) consistant à augmenter le pH de la saumure stérile par addition dhydroxyde de calcium.
CA2846154A 2014-03-12 2014-03-12 Une methode de boucle fermee amelioree pour l'extraction d'or et d'argent par halogenes Active CA2846154C (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2846154A CA2846154C (fr) 2014-03-12 2014-03-12 Une methode de boucle fermee amelioree pour l'extraction d'or et d'argent par halogenes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA2846154A CA2846154C (fr) 2014-03-12 2014-03-12 Une methode de boucle fermee amelioree pour l'extraction d'or et d'argent par halogenes

Publications (2)

Publication Number Publication Date
CA2846154A1 CA2846154A1 (fr) 2015-09-12
CA2846154C true CA2846154C (fr) 2021-05-25

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CA2846154A Active CA2846154C (fr) 2014-03-12 2014-03-12 Une methode de boucle fermee amelioree pour l'extraction d'or et d'argent par halogenes

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CA (1) CA2846154C (fr)

Also Published As

Publication number Publication date
CA2846154A1 (fr) 2015-09-12

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