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WO2021119862A1 - Procédé hydrométallurgique pour le traitement de sulfures primaires et secondaires pour améliorer la récupération de cuivre et la cinétique de la lixiviation de ces minerais - Google Patents

Procédé hydrométallurgique pour le traitement de sulfures primaires et secondaires pour améliorer la récupération de cuivre et la cinétique de la lixiviation de ces minerais Download PDF

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Publication number
WO2021119862A1
WO2021119862A1 PCT/CL2020/050118 CL2020050118W WO2021119862A1 WO 2021119862 A1 WO2021119862 A1 WO 2021119862A1 CL 2020050118 W CL2020050118 W CL 2020050118W WO 2021119862 A1 WO2021119862 A1 WO 2021119862A1
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WO
WIPO (PCT)
Prior art keywords
mineral
copper
curing
hydrometallurgical process
leaching
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.)
Ceased
Application number
PCT/CL2020/050118
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English (en)
Spanish (es)
Inventor
Luis Exequiel LUENGO MOSCOSO
Igor Wilkomirsky Fuica
Fernando Antonio PARADA LUNA
Andrés Antonio REGHEZZA INZUNZA
Yovanni Estefano LUENGO RAMÍREZ
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.)
Luengo & Asociados Consultores SpA
Universidad de Concepcion
Original Assignee
Luengo & Asociados Consultores SpA
Universidad de Concepcion
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
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Application filed by Luengo & Asociados Consultores SpA, Universidad de Concepcion filed Critical Luengo & Asociados Consultores SpA
Publication of WO2021119862A1 publication Critical patent/WO2021119862A1/fr
Anticipated expiration legal-status Critical
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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
    • C22B15/00—Obtaining copper
    • 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
    • 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 technology is oriented to the mining area, more particularly, it corresponds to a hydrometallurgical process for curing primary and secondary sulfides, to improve copper recovery.
  • the production of copper from its minerals has two types of processes corresponding to the pyrometallurgical and hydrometallurgical routes, where the latter has significantly lower associated costs than the pyrometallurgical (OPEX 40 to 60% lower).
  • the hydrometallurgical process is technically very efficient for oxidized copper ores, however, its reserves do not allow it to produce more than 20 to 25% of the total copper production and the rest comes from the exploitation of sulphide copper ores that are treated. preferably by concentration by flotation, and then by the pyrometallurgical route.
  • Chloride has a catalytic effect on sulfide leaching, which has long been studied applied primarily to the leaching of copper concentrates, and more recently its effect on heap leaching of unconcentrated minerals.
  • the addition of the salt is carried out in the stage of curing and agglomerating the mineral and the pile is irrigated with refining that contains chloride product of the closed circuit operation Leaching - Solvent Extraction.
  • primary copper sulphides are more refractory to leaching, particularly chalcopyrite, which represents the main copper reserve.
  • chalcopyrite represents the main copper reserve.
  • Patent application CL 201800350 (Akira & Katsuyuki), where a method is disclosed to leach copper from copper sulfide ore using a sulfuric acid solution as a leaching solution, containing iodide ions and preferably iron (III) ions in excess.
  • Patent application WO / 2018/072029 ⁇ D ⁇ xon et al. which protects a process for the recovery of metals from metal sulfides by contacting the metal sulfide with a sulfuric acid solution containing ferric sulfate and a reagent containing a thiocarbonyl functional group, increasing the leaching kinetics of the metal.
  • Patent CL56,584 (Shuffer), which protects a process to leach copper ores by adding boric acid to the leaching solution that fulfills a function of co-leaching or leaching aid, to produce an increase in copper recovery.
  • the present technology corresponds to a hydrometallurgical process for curing primary and secondary sulfides, leading to a solubilization of refractory matrices outside the heap leaching process.
  • This technology allows an increase in the recovery percentage of secondary sulphides equal to or greater than 90%, and a reduction of at least 50% in the total process time.
  • this process can be applied in heap leaching, mainly in low-grade minerals that cannot be profitable through the concentrator plant methodology.
  • the invention provides an alternative for maximizing the solubilization of the refractory mineral under a pre-curing treatment of the copper sulphide mineral, by using a curing solution composed of H2SO4 - H2O - FeC.
  • the hydrometallurgical process comprises at least the following stages: a. crushing: the size of the mineral must be reduced to under 5 centimeters, in order to expose the greatest amount of the mineral surface to the curing solution; b. Agglomeration: the crushed mineral must be cured in at least one continuous agglomerator drum where plant refinement and / or H2O are added in a quantity between 10 - 100 L / ton of mineral and sulfuric acid in a quantity between 1 - 50 kg / ton of mineral , and immediately ferric chloride (FeC) should be added in a concentration between 2 - 20 kg / ton of mineral until reaching a humidity in the agglomerated mineral of between 4 - 15%, this in order to capture, in the humid environment, hydrochloric acid produced in the following chemical reaction:
  • sodium chloride can be added, in a complementary way to ferric chloride, in a dose of between 2 - 30 kg / ton of mineral; c. rest: once the mineral has been agglomerated with the curing solution, which must be transported to stacking, where it is subjected to rest between 5 - 90 days, to achieve the maximization of solubility of the refractory matrices; d. irrigation: after the resting period, the piled mineral must be irrigated with a refining solution or aqueous irrigation solution at a rate of between 1 - 20 L / hm 2 to extract the sulphated copper.
  • this stage of irrigation can be replaced by a stage of leaching the mineral by conventional agitation.
  • This process achieves a reduction of the leaching cycle by at least 50% and an increase in copper recoveries of over 90%, improving extraction kinetics. In addition, it reduces the consumption of water and sulfuric acid since the irrigation process in the leaching piles is shortened.
  • this hydrometallurgical process is simpler in its operation, since it does not require monitoring of parameters for the preservation of bioleaching bacteria.
  • this hydrometallurgical process can be used in reservoirs where species with high chlorine content such as atacamite are found, which cannot be subjected to bioleaching.
  • this technology does not modify the devices and / or equipment of the mining process, so its implementation is low cost and has a high impact in the short term; it also uses less water resources and does not generate waste such as tailings.
  • Example 1 Evaluation of the hydrometallurgical process for curing secondary sulfides.
  • Example 2 Evaluation of the hydrometallurgical process for curing primary sulfides.

Landscapes

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

Abstract

L'invention concerne un procédé hydrométallurgique pour le traitement de sulfures primaires et secondaires afin d'améliorer la récupération de cuivre, comprenant : (a) le broyage : la taille du minerai doit être réduite à moins de 5 cm ; (b) l'agglomération : le minerai broyé doit être traité dans au moins un tambour d'agglomération continue dans lequel il est additionné d'un raffinat de plante et/ou d'H2O et d'acide sulfurique et de chlorure ferrique jusqu'à atteindre une humidité dans le minerai aggloméré compris entre 6 et 10%, (c) le repos : une fois aggloméré le minerai, il doit être transporté vers un tas, lieu où il est laissé reposer entre 5 et 90 jours avec le minerai couvert ou découvert ; et (d) l'arrosage : après repos, le minerai empilé doit être arrosé avec une solution de raffinage ou solution d'arrosage pour extraire le cuivre sulfaté ou soumis à une étape de solubilisation.
PCT/CL2020/050118 2019-12-18 2020-10-08 Procédé hydrométallurgique pour le traitement de sulfures primaires et secondaires pour améliorer la récupération de cuivre et la cinétique de la lixiviation de ces minerais Ceased WO2021119862A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CL2019003731A CL2019003731A1 (es) 2019-12-18 2019-12-18 Un proceso hidrometalúrgico para el curado de sulfuros primarios y secundarios para mejorar la recuperación de cobre y la cinética de la lixiviación de estos minerales.
CL3731-2019 2019-12-18

Publications (1)

Publication Number Publication Date
WO2021119862A1 true WO2021119862A1 (fr) 2021-06-24

Family

ID=71835378

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CL2020/050118 Ceased WO2021119862A1 (fr) 2019-12-18 2020-10-08 Procédé hydrométallurgique pour le traitement de sulfures primaires et secondaires pour améliorer la récupération de cuivre et la cinétique de la lixiviation de ces minerais

Country Status (2)

Country Link
CL (1) CL2019003731A1 (fr)
WO (1) WO2021119862A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12264381B2 (en) 2020-09-18 2025-04-01 Jetti Resources, Llc Extracting base metals using a wetting agent and a thiocarbonyl functional group reagent
US12416066B2 (en) 2016-10-19 2025-09-16 Jetti Resources, Llc Process for leaching metal sulfides with reagents having thiocarbonyl functional groups
WO2025012848A3 (fr) * 2022-07-15 2026-01-08 Corporacion Nacional Del Cobre De Chile Procédé de lixiviation de minerais en tas avec réchauffement semi-autogène

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100018349A1 (en) * 2008-07-23 2010-01-28 Manabu Manabe Method of leaching copper sulfide ore with the use of iodine
WO2017063099A1 (fr) * 2015-10-16 2017-04-20 Lixivia Procesos Metalúrgicos Spa Procédé hydrométallurgique pour la lixiviation de minerais de cuivre et de produits qui les contiennent, mélange réactif utilisé dans ledit procédé

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100018349A1 (en) * 2008-07-23 2010-01-28 Manabu Manabe Method of leaching copper sulfide ore with the use of iodine
WO2017063099A1 (fr) * 2015-10-16 2017-04-20 Lixivia Procesos Metalúrgicos Spa Procédé hydrométallurgique pour la lixiviation de minerais de cuivre et de produits qui les contiennent, mélange réactif utilisé dans ledit procédé

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
AI-HARAHSHE, M. ET AL.: "Ferric chloride leaching of chalcopyrite; : Synergetic effect of CuCI", HYDROMETALLURG, vol. 91, 2008, pages 89 - 97, XP022524531, Retrieved from the Internet <URL:http://dx.doi.org/10.1016/j.hydromet.2007.11.011> *
HAVLIK, TOMÁS, ŠKROBIAN MILAN, BALÁŽ PETER, KAMMEL ROLAND: "Leaching of chalcopyrite concentrate with ferric chloride", INT. J. MINER. PROCESS., vol. 43, no. 1-2, 1995, pages 61 - 72, XP055836146, DOI: 10.1016/0301-7516(94)00040-7 *
SALINAS, KARINA, HERREROS OSVALDO, TORRES CYNTHIA: "Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous Media", MINERALS, vol. 8, 25 July 2018 (2018-07-25), pages 1 - 12, XP055836141, Retrieved from the Internet <URL:http://dx.doi.org/10.3390/min8080312> DOI: 10.3390/min8080312 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12416066B2 (en) 2016-10-19 2025-09-16 Jetti Resources, Llc Process for leaching metal sulfides with reagents having thiocarbonyl functional groups
US12264381B2 (en) 2020-09-18 2025-04-01 Jetti Resources, Llc Extracting base metals using a wetting agent and a thiocarbonyl functional group reagent
WO2025012848A3 (fr) * 2022-07-15 2026-01-08 Corporacion Nacional Del Cobre De Chile Procédé de lixiviation de minerais en tas avec réchauffement semi-autogène

Also Published As

Publication number Publication date
CL2019003731A1 (es) 2020-07-10

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