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WO2025175347A1 - Matériau contenant du cuivre de lixiviation - Google Patents

Matériau contenant du cuivre de lixiviation

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Publication number
WO2025175347A1
WO2025175347A1 PCT/AU2025/050141 AU2025050141W WO2025175347A1 WO 2025175347 A1 WO2025175347 A1 WO 2025175347A1 AU 2025050141 W AU2025050141 W AU 2025050141W WO 2025175347 A1 WO2025175347 A1 WO 2025175347A1
Authority
WO
WIPO (PCT)
Prior art keywords
copper
additive
alkynyl
alkyl
alkenyl
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/AU2025/050141
Other languages
English (en)
Inventor
Daniel Arthur Kittelty
Paul Leslie Brown
Ralph Peter Hackl
Pauline Maree NAJJAR
Anna ZONNEVELD
Jason Maurice YOUNG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technological Resources Pty Ltd
Original Assignee
Technological Resources Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2024900432A external-priority patent/AU2024900432A0/en
Application filed by Technological Resources Pty Ltd filed Critical Technological Resources Pty Ltd
Publication of WO2025175347A1 publication Critical patent/WO2025175347A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • C22B3/18—Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0063—Hydrometallurgy
    • C22B15/0065—Leaching or slurrying
    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0063—Hydrometallurgy
    • C22B15/0065—Leaching or slurrying
    • C22B15/0067—Leaching or slurrying with acids or salts thereof
    • 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
    • C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
    • 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
    • C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
    • C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
    • 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
    • C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
    • C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
    • C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
    • 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
    • C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
    • C22B3/16—Extraction of metal compounds from ores or concentrates by wet processes by leaching in organic solutions
    • C22B3/1608—Leaching with acyclic or carbocyclic agents
    • C22B3/1616—Leaching with acyclic or carbocyclic agents of a single type
    • C22B3/165—Leaching with acyclic or carbocyclic agents of a single type with organic acids
    • 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
    • C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
    • 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

Definitions

  • the present invention relates to leaching copper-containing material, where the term “material” includes, for example, ores and waste materials such as tailings.
  • the present invention relates particularly, although not exclusively, to leaching any one or more of (a) copper-containing ores (which may be in the form of agglomerates of ore fragments), (b) concentrates of the ores, and (c) tailings of the ores or concentrates produced for example by flotation or other downstream processing of ores or concentrates.
  • the present invention relates particularly, although not exclusively, to leaching copper- containing sulfidic ores, such as sulfidic ores that contain copper minerals such as chalcopyrite (CuFeS2) and/or enargite (CU3ASS4).
  • the sulfidic ores may contain other copper minerals.
  • the present invention relates particularly, although not exclusively, to a method of leaching copper-containing ores, particularly copper-containing sulfidic ores, using an additive to enhance dissolution of copper in the ores.
  • the particle size of the ores is typically reduced from run-of-mine size, for example by crushing and grinding operations, to allow processing via heap leaching, vat leaching or reactor leaching options.
  • leaching processes involve the application of an acid and an oxidant to dissolve copper into solution. Copper is subsequently recovered from the acidic solution by a range of recovery options including solvent extraction and electrowinning (SX/EW), cementation onto more active metals such as iron, hydrogen reduction, and direct electrowinning. The acidic solution is regenerated and recycled to leach more copper from the ores. Leaching may be assisted by the use of ferrous iron oxidising and sulfur oxidizing microorganisms, as well as oxidants such as SO2/O2, H2O2, and Fe(III), etc.
  • leaching may provide lower metal recoveries than other process options for recovering copper from sulfidic ores, such as milling and flotation, that produce copper- containing concentrates that are then smelted to produce copper metal.
  • Leaching processes suitable for recovering copper from chalcopyrite in an alkaline environment have also been developed.
  • a mixture of glycine and ammonia is used to recover copper from chalcopyrite at a pH of 10.5.
  • the glycine is used as a lixiviant which complexes with copper ions to effect phase transfer of the copper in the ore from solid to liquid and the ammonia complexes with the liberated copper ions to extend the solubility limit of these ions.
  • a Group company of the applicant is involved in a research and development project relating to leaching of copper-containing ores (including copper-containing sulfidic ores such as chalcopyrite and enargite).
  • PCT/AU2019/050383 (WO2019/213694) is based on a realisation that leaching copper-containing ores or concentrates of the ores or tailings of the ores or concentrates produced for example by flotation or other downstream processing of ores or concentrates can be enhanced via the formation of a complex comprising (a) sulfur, that has originated from copper minerals in the ores, and (b) an additive.
  • PCT/AU2019/050383 WO2019/213694
  • PCT/AU2019/050383 WO2019/213694
  • the Group company of the applicant has carried out further research and development work and found a number of other additives that provide enhanced copper extraction efficiency compared to the additives of the invention of PCT/AU2019/050383 (WO2019/213694) and otherwise known to the applicant.
  • the invention is a method of leaching copper-containing material, where the term “material” encompasses as-mined material or from stockpiles that are considered to be too low in grade to be economically processed in flotation and other wet processing systems for recovering copper from the material and includes, for example, ores, concentrates of the ores, and waste materials such as tailings of the ores. Examples of such material include ores containing chalcopyrite and/or enargite, concentrates of the ores, or tailings of the ores or the concentrates.
  • the method comprises a step of leaching the copper-containing material with a leach liquor at a pH of less than 7 in the presence of an additive including a carboxylic acid functional group that enhances dissolution of copper from copper minerals in the material by forming a complex between (a) sulfur, that has originated from copper minerals in the material, and (b) the additive.
  • additive is understood herein to encompass a reagent that is added into the reaction mixture and a reagent that is formed in-situ rather than added into the reaction mixture which enhance dissolution of copper from copper minerals in the material.
  • the advantages of the invention include providing an opportunity for microorganism-assisted and/or chemically assisted leaching of copper minerals in copper-containing material, particularly low-grade ores (i.e. typically less than 2.0 wt.% copper, typically less than 1.5 % copper, typically less than 1.0 % copper), at relatively low temperatures and at comparatively low operating costs with high recoveries.
  • copper extraction additives i.e. typically less than 2.0 wt.% copper, typically less than 1.5 % copper, typically less than 1.0 % copper
  • acid is required to maintain the low pH environment for the additives to perform optimally, for example to maximise oxidant, particularly ferric, concentration. This increases operational cost.
  • Use of an additive that can operate under high acidic pH environment is desirable as it reduces acid consumption and raffinate bleed neutralisation requirements, particularly when treating high acid consuming copper ores.
  • the positioning of the carboxylic acid group relative to the other functional groups and/or charge of the additive influence(s) the protonation of the additive and allow(s) the additive to form a complex with sulfur under a wider acidic pH range.
  • the complex may comprise sulfur from the copper minerals and the additive, with the additive breaking down a passivating layer or reducing a formation of a passivating layer and therefore increasing access for leaching copper from copper material during the method.
  • the method may include any one of the following categories of leaching steps:
  • one leaching category that is of particular interest to the applicant is heap leaching agglomerates of ore fragments or ore concentrates or tailings of the ores or concentrates.
  • fragment is understood herein to mean any suitable size of mined or treated (e.g. crushed) material having regard to materials handling and processing capabilities of the apparatus used to carry out the method. It is also noted that the term “fragment” as used herein may be understood by some persons skilled in the art to be better described as “particles”. The intention is to use both terms as synonyms.
  • the additive may also include an amine functional group.
  • the amine functional group and the carboxylic acid functional group may be spaced by at least one carbon atom to permit the additive to form complexes between sulfur, that has originated from copper minerals in the material, and the additive.
  • the amine functional group and the carboxylic acid functional group may be spaced by one carbon atom.
  • the additive may be selected to enhance copper extraction efficiency by at least 1% compared to leaching efficiency without the additive.
  • the additive may be selected to enhance copper extraction efficiency by at least 5%.
  • the additive may be selected to enhance copper extraction efficiency by at least 20%.
  • the additive may be a compound that contains molecular scaffold (I) or a polymer that contains molecular scaffold (I) repeated through the polymer: wherein, the nitrogen atom is independently substituted or unsubstituted, and selected from the group consisting of a primary amine group, a secondary amine group, and a tertiary amino group; wherein the carbon atom adjacent to the nitrogen atom may be substituted or unsubstituted; and wherein the bonds between the nitrogen atom and carbon atoms in the scaffold may be single bonds or multiple bonds.
  • a “molecular scaffold” to be a molecular core to which functional groups are attached.
  • the additive may be a compound of formula (II): wherein,
  • R 1 and R 2 are each independently selected from a lone pair electron, H, alkyl groups, alkenyl groups, alkynyl groups, or alkylamino groups, or the substituents on the nitrogen atom together form an alkyl or alkynyl group that connect to form a ring
  • the additive may be selected from the group comprising iminodiacetic acid (IDA), diethylenetriamine pentaacetic acid (DTP A), trans-l,2-diaminocyclohexane-A, N, N', N'- tetraacetate (CDTA), [ethyleneA/'.sfoxonitrilo)]- tetraacetate (EGTA), phenyldiaminetetraacetic acid (PDTA), triethylenetetraaminehexaacetic acid (TTHA), alanine, and sarcosine
  • IDA iminodiacetic acid
  • DTP A diethylenetriamine pentaacetic acid
  • CDTA trans-l,2-diaminocyclohexane-A, N, N', N'- tetraacetate
  • EGTA ethyleneA/'.sfoxonitrilo)]- tetraacetate
  • PDTA phenyldiaminetetraacetic acid
  • TTHA
  • sulfur is derived from the dissolution of the copper minerals in the material, such as chalcopyrite or enargite.
  • the additive may react directly with the sulfur from the mineral to enhance leaching via reducing the activation energy, i.e. have a catalytic effect. It is preferred that the additive be sufficiently water soluble to be able to enhance copper extraction into the leach solution.
  • the additive may be a degradation product that forms under the conditions of the leach and is an effective additive in the terms of the invention.
  • the degradation product may be a degradation product of another said additive.
  • the method may include adjusting the concentration of the additive in the regenerated leach liquor to maintain the concentration at 1 g/L in the regenerated leach liquor.
  • the method may include forming agglomerates of copper-containing material fragments, particularly ore fragments and adding the additive to agglomerates prior to the leaching step.
  • the method may include forming agglomerates of copper-containing material fragments, particularly ore fragments and adding the additive while forming agglomerates.
  • the method may include forming agglomerates of copper-containing material fragments, particularly ore fragments, wherein the additive is either sarcosine or triethylenetetraaminehexaacetic acid (TTHA), and the method of forming agglomerates may include:
  • the concentration adjustment may include adding the additive to the regenerated leach liquor to maintain the concentration.
  • the concentration adjustment may include removing the additive from the regenerated leach liquor to maintain the concentration.
  • the method may include bioleaching with microorganisms.
  • the microorganisms may be one or more than one of psychrotolerant or mesophilic or thermophilic (moderate or extreme) bacteria or archaea.
  • the microorganisms may be acidophilic bacteria or archaea.
  • the microorganisms may be thermophilic acidophiles.
  • the method may include adding chemical oxidants to the leach liquor.
  • the method may include adding ferric ions to the leach liquor as a chemical oxidant.
  • the chemical oxidants may also include any one or more of pyrolusite, permanganate ions, peroxide ions, and chlorate ions.
  • the method may include adding chloride ions to the leach liquor.
  • the concentration of chloride added to the leach liquor is less than 5g/L, less than 3g/L or less than Ig/L.
  • the method may include controlling the temperature of the leach liquor to be less than 100 °C, less than 65 °C, less than 60 °C, less than 55 °C, or less than 50 °C.
  • the method may include controlling the pH of the leach liquor to be less than 4.
  • the method may include controlling the pH of the leach liquor to be less than 3.2.
  • the method may include controlling the pH of the leach liquor to be less than 2.5.
  • the method may include controlling the pH of the leach liquor to be in a range of 1.2 to 2.5.
  • downstream recovery steps include recovering copper from solution in pregnant leach liquor.
  • the method may include supplying the leach liquor to a heap of agglomerates of copper-containing material fragments, particularly ore fragments and allowing the leach liquor to flow through the heap and leach copper from agglomerates and collecting leach liquor from the heap, processing the leach liquor and recovering copper from the liquor.
  • the agglomeration step may include mixing together an acid, typically sulfuric acid but could also be dilute hydrochloric or nitric acid, with copper-containing material fragments, particularly ore fragments.
  • the added acid dose rate may be less than 100 kg TbSO dry t ore, typically less than 50 kg E SCh/dry t ore, typically less than 30 kg EbSCfl/dry t ore, and may be less than 10 kg EbSCh/dry t ore or less than 5 kg EbSCh/dry t ore.
  • the acid dose rate is 0.5 - 10 kg EbSO dry t ore.
  • the agglomeration step may include mixing together pregnant leach solution or raffinate with copper-containing material fragments, particularly ore fragments.
  • the agglomeration step may include mixing microorganisms that can assist leaching copper-containing material fragments, particularly ore fragments.
  • the microorganisms may be one or more than one of mesophilic, thermophilic (moderate or extreme) or psychrotolerant bacteria or archaea.
  • the microorganisms may be acidophilic bacteria or archaea.
  • the microorganisms may be thermophilic acidophiles.
  • the agglomeration step may include simultaneously mixing and agglomerating copper- containing material fragments, particularly ore fragments.
  • the agglomeration may include mixing copper-containing material fragments, particularly ore fragments in one-step and then agglomerating the mixed fragments in a subsequent step. There may be overlap between the mixing and agglomeration steps.
  • the method may include reducing the size of a mined material prior to the agglomeration step.
  • primary crushing is understood herein to mean crushing material to a top size of 250 to 150 mm in the case of copper-containing ores where the copper is in the form of sulfides. It is noted that the top size may be different for material containing different valuable metals.
  • the method may include crushing the mined material in a primary crushing step and then a secondary and possibly tertiary and possibly quaternary crushing step prior to the agglomeration step.
  • the invention also provides a heap of material, with the material including the abovedescribed agglomerates of material fragments.
  • the invention also includes a method of heap leaching that includes:
  • Heap leaching may include recovering copper from the leach liquor in downstream copper recovery steps.
  • the leach liquor may be regenerated and recycled to the heap.
  • the leaching step may include adding the additive during the step.
  • the method may also include recovering the leached metal as a metal product.
  • this step includes recovering the leached metal from solution in a pregnant leach liquor.
  • Figure 1 illustrates the steps in one embodiment of a method of heap leaching agglomerates of fragments of copper-containing ore that contains chalcopyrite and/or enargite with a leach liquor containing an additive in accordance with the present invention
  • Figure 2 is a graph illustrating the copper extraction efficiency of sarcosine at pHs ranging from 1.2 to 2.5 on chalcopyrite mineral samples;
  • Figure 3 is a graph illustrating the copper extraction efficiency of various additives according to the present invention at a pH of 1.2 on chalcopyrite mineral samples;
  • Figure 4 is a graph illustrating the copper extraction efficiency of various additives according to the present invention at a pH of 2.5 on chalcopyrite mineral samples.
  • Figure 5 is a graph illustrating the copper extraction efficiency of sarcosine, TTHA and EGTA according to the present invention at a pH of 2.5 on chalcopyrite rich ore samples.
  • the invention also extends to heap, vat, and tank leaching concentrates of copper-containing material, with the concentrates being in any suitable form, including unagglomerated and agglomerated forms. It is also noted that the invention also extends to heap or vat or tank leaching tailings of the material or concentrates produced for example in flotation or other downstream processing of material or concentrates.
  • the flow sheet of Figure 1 shows the steps in one embodiment of a method of heap leaching agglomerates of fragments of copper-containing ore that contains chalcopyrite and/or enargite with a leach liquor containing an additive in accordance with the invention.
  • the method includes the steps of forming agglomerates of copper containing ore in an agglomeration station 3, forming a heap 5 from the agglomerates, supplying a leach liquor 15 to the heap 5 and taking copper into solution, collecting leach liquor after it has passed through the heap, recovering copper from solution in the leach liquor from the heap in a copper recovery circuit 17, for example by solvent extraction, and regenerating the leach liquor from the heap and recycling the regenerated leach liquor to the heap.
  • microorganisms identified by the numeral 13 in the Figure, of any suitable type and in any suitable concentration.
  • the agglomerates produced in the agglomeration station 3 are subsequently used in the construction of the heap 5.
  • the agglomerates produced in the agglomeration station 3 may be transferred directly to a heap construction site.
  • the agglomerates may be stockpiled and used as required for a heap.
  • the agglomeration station 3 and the heap 5 are typically in close proximity. However, this is not essential and may not be the case.
  • the leached copper is recovered from the leach liquor in the downstream copper recovery circuit 17.
  • the agglomeration station 3 may be any suitable construction that includes a drum, conveyor (or other device) for mixing the feed materials for the agglomerates and agglomerating the feed materials.
  • the agglomeration conditions in the agglomeration station 3 are selected to form agglomerates of the required size and mechanical properties for the heap 5.
  • Mixing and agglomerating the feed materials for the agglomerates may occur simultaneously.
  • mixing the feed materials may be carried out first and agglomerating (for example initiated by the addition of the acid) may be carried out after mixing has been completed to a required extent.
  • the timing of adding and then mixing and agglomerating feed materials may be selected to meet the end-use requirements for the agglomerates. For example, it may be preferable in some situations to start mixing fragments containing chalcopyrite and then adding silver in a solution or in a solid form of silver, acid, and microorganisms progressively in that order at different start and finish times in the agglomeration step.
  • the additives of the invention may be added to the leach liquor 15 in the required concentrations.
  • concentration of the additive is up to 10 g/L, up to 5 g/L, up to 2.5 g/L, up to 1.5 g/L, up to 1.25 g/L, or up to 1 g/L, in the leach liquor.
  • test work using additive-containing liquor was conducted in small scale leaching reactors.
  • the following results were obtained with low grade chalcopyrite mineral samples containing less than 2 wt.% copper.
  • Reactor leaching tests were conducted at a pH of 1.2 and a pH of 2.5.
  • the pH was maintained at the desired value by adding an acid (H2SO4) or a base (LiOH).
  • the oxidation potential of the solutions was maintained at approximately 700 mV determined with respect to the standard hydrogen electrode to simulate conditions that may be seen when leaching copper ores.
  • the oxidation potential was maintained at the desired value by adding an oxidant (H2O2) or a reductant (Li2SO3).
  • the initial leach solutions were acidified iron solutions at ⁇ 2 g/L Fe(III) added as a sulfate.
  • the tests were maintained at 50 °C. Baseline tests were carried out at pH 1.2 without any additive. Tests with additives were carried out with additive concentrations of 1 g/L.
  • the following additives were tested: IDA, DTP A, TTHA, EGTA, PDTA, CDTA, sarcosine, and alanine.
  • Figure 2 is a graph illustrating the copper extraction efficiency of sarcosine at pHs ranging from 1.2 to 2.5.
  • Figure 3 is a graph illustrating the copper extraction efficiency of various additives according to the present invention at a pH of 1.2.
  • Figure 5 shows that copper extraction involving the use of carboxylic acid additives can be further enhanced by that the addition of ferric ions. Specifically, Figure 5 show that:

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Abstract

L'invention concerne un procédé de lixiviation d'un matériau contenant du cuivre, tel que des minerais contenant de la chalcopyrite et/ou de l'énargite, des concentrés des minerais, ou des résidus des minerais ou des concentrés, comprenant une étape de lixiviation du matériau contenant du cuivre avec une liqueur de lixiviation à un pH inférieur à 7 en présence d'un additif comprenant un groupe fonctionnel d'acide carboxylique qui améliore la dissolution du cuivre à partir de minéraux de cuivre dans le matériau contenant du cuivre par formation d'un complexe entre (a) du soufre, qui provient de minéraux de cuivre dans le matériau contenant du cuivre, et (b) l'additif.
PCT/AU2025/050141 2024-02-22 2025-02-20 Matériau contenant du cuivre de lixiviation Pending WO2025175347A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2024900432A AU2024900432A0 (en) 2024-02-22 Leaching Copper-Containing Material
AU2024900432 2024-02-22

Publications (1)

Publication Number Publication Date
WO2025175347A1 true WO2025175347A1 (fr) 2025-08-28

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998008585A1 (fr) * 1996-08-26 1998-03-05 Geochem Technologies, Inc. Lixiviation de mineraux chalcogenes metalliques (de type sulfure) au moyen d'agents oxydants et chelateurs
RU2482198C1 (ru) * 2012-01-17 2013-05-20 Общество с ограниченной ответственностью "УралЭкоМет" (ООО "УралЭкоМет") Способ переработки шламов нейтрализации кислых шахтных вод

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998008585A1 (fr) * 1996-08-26 1998-03-05 Geochem Technologies, Inc. Lixiviation de mineraux chalcogenes metalliques (de type sulfure) au moyen d'agents oxydants et chelateurs
RU2482198C1 (ru) * 2012-01-17 2013-05-20 Общество с ограниченной ответственностью "УралЭкоМет" (ООО "УралЭкоМет") Способ переработки шламов нейтрализации кислых шахтных вод

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RUIZ-SANCHEZ, A. ET AL.: "Improvement effect of organic ligands on chalcopyrite leaching in the aqueous medium of sulfuric acid-hydrogen peroxide-ethylene glycol", HYDROMETALLURGY, vol. 193, no. 105293, 2020, XP086135684, DOI: 10.1016/j.hydromet.2020.105293 *

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