WO2023037876A1 - 合金の処理方法 - Google Patents
合金の処理方法 Download PDFInfo
- Publication number
- WO2023037876A1 WO2023037876A1 PCT/JP2022/031842 JP2022031842W WO2023037876A1 WO 2023037876 A1 WO2023037876 A1 WO 2023037876A1 JP 2022031842 W JP2022031842 W JP 2022031842W WO 2023037876 A1 WO2023037876 A1 WO 2023037876A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- leaching
- alloy
- cobalt
- solution
- oxidation
- Prior art date
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 106
- 239000000956 alloy Substances 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000012545 processing Methods 0.000 title claims abstract description 24
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 136
- 238000002386 leaching Methods 0.000 claims abstract description 112
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 68
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 64
- 239000010941 cobalt Substances 0.000 claims abstract description 64
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 64
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910052802 copper Inorganic materials 0.000 claims abstract description 52
- 239000010949 copper Substances 0.000 claims abstract description 52
- 239000002253 acid Substances 0.000 claims abstract description 34
- 239000002699 waste material Substances 0.000 claims abstract description 32
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 29
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 16
- 229910021607 Silver chloride Inorganic materials 0.000 claims abstract description 7
- 229910052709 silver Inorganic materials 0.000 claims abstract description 7
- 239000004332 silver Substances 0.000 claims abstract description 7
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims abstract description 7
- 238000003672 processing method Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims description 28
- 230000009467 reduction Effects 0.000 claims description 23
- 239000007800 oxidant agent Substances 0.000 claims description 22
- 238000006386 neutralization reaction Methods 0.000 claims description 20
- 239000003638 chemical reducing agent Substances 0.000 claims description 15
- 230000033116 oxidation-reduction process Effects 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 11
- 230000003472 neutralizing effect Effects 0.000 claims description 11
- 230000008018 melting Effects 0.000 claims description 10
- 230000007423 decrease Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 53
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 22
- 238000006243 chemical reaction Methods 0.000 description 19
- 229910052751 metal Inorganic materials 0.000 description 16
- 239000002184 metal Substances 0.000 description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 15
- 239000000843 powder Substances 0.000 description 15
- 239000007788 liquid Substances 0.000 description 12
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 11
- 238000001035 drying Methods 0.000 description 10
- 238000000926 separation method Methods 0.000 description 10
- 239000012535 impurity Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000011084 recovery Methods 0.000 description 7
- -1 vinyl chloride Chemical compound 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 5
- 229910001431 copper ion Inorganic materials 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 150000007513 acids Chemical class 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000005587 bubbling Effects 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000002161 passivation Methods 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- 238000000638 solvent extraction Methods 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 239000010926 waste battery Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 1
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005486 sulfidation Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
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
- C22B23/00—Obtaining nickel or cobalt
-
- 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
- C22B3/20—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
-
- 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
- C22B7/00—Working 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
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
Definitions
- the present invention relates to an alloy processing method for obtaining a solution containing nickel and/or cobalt from an alloy containing nickel and/or cobalt and copper.
- LiB lithium-ion batteries
- LIB is a negative electrode material in which a copper foil is used as a negative electrode current collector and a negative electrode active material such as graphite is adhered to the surface inside an outer can made of metal such as aluminum or iron or plastic such as vinyl chloride,
- a positive electrode material in which a positive electrode active material such as lithium nickel oxide or lithium cobalt oxide is fixed to a positive electrode current collector made of aluminum foil is charged together with a separator made of a polypropylene porous resin film or the like, and lithium hexafluorophosphate is charged. It has a structure in which an organic solvent containing an electrolyte such as (LiPF 6 ) is impregnated as an electrolytic solution.
- waste LIBs contain valuable components such as nickel, cobalt, and copper, and it is desirable to recover and reuse these valuable components for the effective utilization of resources.
- Patent Literature 1 discloses a method of recovering valuable metals using dry processing. By applying the method disclosed in Patent Document 1 to the recovery of valuable metals from waste LIB, a copper alloy containing nickel and cobalt can be obtained.
- dry process has the disadvantage of requiring energy for heating to a high temperature using a furnace, but has the advantage of being able to separate various impurities all at once. Moreover, the slag obtained by dry processing has the advantage of being chemically stable, having little concern about affecting the environment, and being easy to dispose of.
- the waste LIB is treated by dry processing
- the metal obtained by dry processing is an alloy in which valuable components coexist, and in order to reuse it, it is necessary to separate each component from this alloy and refine it to remove impurities.
- wet processing (hereinafter also referred to as “wet processing”) using hydrometallurgical methods using acid treatment, neutralization treatment, solvent extraction treatment, etc. consumes less energy and separates mixed valuable ingredients. There is an advantage that it can be separated into a large amount and recovered in a high-purity grade.
- hexafluorophosphate anions and other constituents of the electrolytic solution contained in waste LIB are difficult-to-process substances that cannot be completely decomposed even at high temperatures and high concentrations of sulfuric acid. and will contaminate the leached acid solution with valuable components. Since the hexafluorophosphate anion is a water-soluble carbonate ester, it is difficult to recover phosphorus and fluorine from the aqueous solution after recovery of valuables. There are significant environmental restrictions, such as the need to take measures such as
- waste LIB is difficult to leach out with acid or the like, and it is not easy to leach out the valuable components completely.
- a strong oxidizing acid is used to forcibly leach out, along with valuable components, even impurity components such as aluminum, iron, and manganese, which are not subject to industrial recovery, are leached out.
- the cost of the neutralizing agent for treatment increases, and problems arise in that the amount of waste water and sediments generated increases.
- the waste LIB may have residual electric charge, and if it is to be disposed of as it is, it may cause heat generation, explosion, or the like.
- the waste LIB which is difficult to process by the above-mentioned dry process or wet process alone, is treated by a method that combines the dry process and the wet process, that is, by a dry process such as roasting the waste LIB, removing impurities as much as possible and uniform waste. Attempts have been made to obtain a LIB-processed product and separate the resulting processed product into valuable components and other components by wet processing.
- the fluorine and phosphorus in the electrolytic solution are volatilized and removed by the dry process, and the structural parts of the waste LIB, such as plastics and organic materials such as separators, are also thermally decomposed. be.
- the waste LIB processed material is obtained in a uniform state through the dry process, it can be easily handled as a uniform raw material even in the wet process.
- the metal obtained by such a method is a sparingly soluble, corrosion-resistant alloy containing nickel and cobalt with a copper base. Even if an attempt is made to separate and recover valuable components from this corrosion-resistant alloy by wet treatment, acid dissolution is difficult and effective recovery is not possible.
- the resulting solution contains high-concentration copper and relatively low-concentration nickel and cobalt.
- nickel and cobalt can be easily separated using a known method such as solvent extraction, but it is difficult to separate copper from nickel and cobalt easily and at low cost.
- the present invention has been proposed in view of such circumstances, and selectively leaching nickel and / or cobalt from an alloy containing nickel and / or cobalt and copper such as waste lithium ion batteries.
- the purpose is to provide a method that can
- a first aspect of the present invention is a method of treating an alloy to obtain a solution containing nickel and/or cobalt from an alloy containing nickel and/or cobalt and copper, wherein the alloy is treated with a sulfiding agent is coexisting, and leaching is performed while controlling the oxidation-reduction potential (a silver/silver chloride electrode as a reference electrode) to 100 mV or more and less than 250 mV to obtain a leaching solution and a leaching residue. wherein, in the leaching step, an operation of temporarily lowering the oxidation-reduction potential to ⁇ 100 mV or less is performed in the leaching treatment.
- the operation of temporarily lowering the oxidation-reduction potential to ⁇ 100 mV or less is intermittently performed multiple times during the leaching treatment. , the processing method of the alloy.
- a third aspect of the present invention is the first or second aspect, wherein a reducing agent is added to the leaching solution obtained through the leaching step to perform a reduction treatment, and the post-reduction solution and the reduction A method of treating an alloy further comprising a reduction step to obtain a residue.
- a fourth aspect of the present invention is the method according to any one of the first to third aspects, wherein a neutralizing agent and an oxidizing agent are added to the reducing solution obtained through the reducing step to oxidize the
- the alloy treatment method further includes an oxidation-neutralization step of performing a neutralization treatment to obtain a post-oxidation-neutralization liquid and an oxidation-neutralization residue.
- a fifth aspect of the present invention is a method for treating an alloy according to any one of the first to fourth aspects, wherein the alloy includes an alloy obtained by melting a waste lithium-ion battery. be.
- nickel and/or cobalt can be selectively leached from an alloy containing nickel and/or cobalt and copper, such as waste lithium ion batteries.
- FIG. 4 is a graph showing changes in ORP values with respect to leaching time in Examples 1 and 2 and Comparative Example 1.
- FIG. 4 is a graph showing the transition of ORP value with respect to leaching time in Comparative Example 1.
- this embodiment A specific embodiment of the present invention (hereinafter referred to as "this embodiment") will be described in detail below. It should be noted that the present invention is not limited to the following embodiments, and can be implemented with appropriate modifications within the scope of the purpose of the present invention.
- the notation "X to Y" (X and Y are arbitrary numerical values) means "X or more and Y or less”.
- the alloy treatment method according to the present embodiment is a method of obtaining a solution containing nickel and/or cobalt from an alloy containing nickel and/or cobalt and copper.
- Alloys containing nickel and/or cobalt and copper to be treated include, for example, waste due to deterioration of automobiles and electronic devices, lithium-ion battery scrap generated along with the life of lithium-ion batteries, or A waste battery or the like such as a defective product in the battery manufacturing process can be used.
- an alloy obtained by subjecting such a waste battery or the like to a dry treatment and heat-melting (melting) to reduce it can be used.
- FIG. 1 is a process chart showing an example of the flow of the alloy treatment method according to the present embodiment.
- an acid solution is added to an alloy containing nickel and/or cobalt and copper in the presence of a sulfiding agent, and leaching is performed while controlling the oxidation-reduction potential (ORP) within a predetermined range.
- ORP oxidation-reduction potential
- a leaching step S1 for obtaining a leachate and a leaching residue
- a reduction step S2 for obtaining a post-reduction solution and a reduction residue by adding a reducing agent to the obtained leaching solution for reduction treatment
- an oxidation-neutralization step S3 of adding a neutralizing agent and an oxidizing agent to the liquid for oxidation-neutralization treatment to obtain an oxidation-neutralized liquid and an oxidation-neutralized residue.
- the leaching step in which the leaching process is performed while controlling the ORP within a predetermined range, specifically within a range of 150 mV or more and less than 250 mV using a silver/silver chloride electrode as a reference electrode.
- an operation is performed to temporarily lower the ORP to -100 mV or less.
- the oxide film (passivation film) formed on the alloy surface in the leaching process can be effectively removed, and nickel and/or cobalt can be selectively leached.
- reaction formulas [1] to [5] show the case where solid sulfur (S) is used as the sulfurizing agent and sulfuric acid is used as the acid.
- S solid sulfur
- ⁇ Cu+S ⁇ CuS [1] ⁇ Ni+ H2SO4 +1 / 2O2 ⁇ NiSO4 + H2O [2] - Co+ H2SO4 +1 / 2O2- > CoSO4 + H2O [3] ⁇ H2S +1/ 2O2 ⁇ S+ H2O [4] ⁇ CuS+2O 2 ⁇ CuSO 4 [5]
- the alloy is subjected to a leaching treatment in the presence of an acid and a sulfiding agent, so that the copper leached from the alloy reacts with the sulfiding agent and precipitates in the form of copper sulfide. can be obtained (reaction formula [1]).
- the precipitated copper sulfide is recovered as a leaching residue.
- by leaching treatment using an acid, nickel and/or cobalt constituting the alloy are leached into a solution, and a leaching solution in which nickel and cobalt are present as ions can be obtained (reaction formulas [2], [3 ]). In this way, copper and nickel and/or cobalt can be separated from the alloy.
- the leached nickel and/or cobalt reacts with the sulfiding agent and becomes sulfide, the sulfide is decomposed due to the presence of the acid solution, and nickel and cobalt are present in the leachate as ions. It will be.
- some copper that has not reacted with the sulfiding agent may remain in the leachate. The copper remaining in the leachate can be effectively and efficiently separated and removed in the reduction step S2, which will be described later.
- Alloys to be processed that is, alloys obtained by melting waste lithium-ion batteries, include alloys cast into plates, alloys drawn into a wire shape and appropriately cut into rods, and powdered alloys (hereinafter referred to as powdered alloys).
- the alloy is also referred to as "alloy powder"), and the shape is not particularly limited. Among them, it is preferable to treat powdery alloy powder, because the leaching treatment can be performed more effectively and efficiently.
- the particle size of the alloy powder is generally 300 ⁇ m or less, so that the leaching process can be performed more effectively.
- the particle size is too fine, the cost is increased and it may cause dust generation or ignition.
- the alloy it is preferable to pre-clean the alloy to be treated with a dilute acid in advance. Thereby, activation treatment can be applied to the surface of the alloy, and the leaching reaction can be promoted.
- the acid solution used for the leaching treatment is not particularly limited, and mineral acids such as sulfuric acid, hydrochloric acid and nitric acid can be used. A mixed solution of these mineral acids may also be used. Furthermore, an acid solution containing chloride in sulfuric acid, for example, may be used.
- the so-called "battery-to-battery” is an ideal recycling method that recycles the waste lithium-ion batteries and supplies them again as raw materials for lithium-ion batteries.
- acids including sulfuric acid By using sulfuric acid, the leachate can be obtained in the form of a sulfate that can be easily used as a positive electrode material for lithium ion batteries.
- the acid solution to be added leaches out the nickel and/or cobalt contained in the alloy to produce salts of nickel and cobalt, but the margin (extra) liberation used for the driving force to speed up the leaching reaction. Since an acid (for example, “free sulfuric acid” when a sulfuric acid solution is used) is also required, an amount exceeding 1 equivalent and 1.2 equivalents or less is required.
- the acid solution and the alloy may be supplied to a device such as a thickener in which mixing parts are connected in multiple stages, and the acid and the alloy may be brought into contact with each other step by step in a countercurrent flow.
- the alloy is supplied to the uppermost mixing section of the apparatus and the acid is supplied to the lowermost mixing section of the apparatus so that the acid and the alloy are brought into stepwise contact in countercurrent flow.
- the added amount (coexisting amount) of the sulfiding agent is preferably 1 equivalent or more with respect to the amount of copper contained in the alloy.
- the amount of the sulfiding agent to be added is preferably 1.5 equivalents or less, preferably 1.25 equivalents or less, relative to the amount of copper contained in the alloy. If the amount of the sulfiding agent added is too large, rather than contributing to the acceleration of the reaction, the amount of residue increases, handling becomes more troublesome, and the possibility of generating hydrogen sulfide gas may increase.
- the leaching solution may be bubbled with air or the like so that the reaction proceeds uniformly.
- divalent copper ions may be added, whereby the divalent copper ions can act as a catalyst to promote the leaching reaction.
- ORP oxidation-reduction potential
- the pH conditions are preferably controlled so that the resulting leachate has a pH in the range of 0.8 or more and 1.6 or less.
- the leaching treatment is performed while controlling the oxidation-reduction potential (ORP) to 100 mV or more and less than 250 mV using a silver/silver chloride electrode as a reference electrode. More preferably, ORP is controlled to 150 mV or more and 200 mV or less.
- ORP oxidation-reduction potential
- the leaching of nickel and/or cobalt is promoted, and re-dissolution of the precipitated copper sulfide due to excessive oxidation can be suppressed. Copper and nickel and/or cobalt can be leached more effectively.
- Specific means of controlling ORP include, for example, adding an oxidizing agent.
- an oxidizing agent such as oxygen, air, hydrogen peroxide, and ozone gas can be used as the oxidizing agent.
- the ORP of the leachate can be controlled in the leaching process by bubbling in the solution and adjusting the supply amount (air supply amount).
- the ORP of the leachate rises too much, the ORP can be lowered by reducing or stopping the supply of the oxidizing agent.
- the ORP can be increased by increasing the supply amount of the oxidizing agent.
- the alloy to be treated tends to form an oxide film in a solution containing an oxidizing agent or dissolved oxygen, such as leaching using acid.
- an oxide film is formed on the alloy, leaching does not proceed sufficiently even when nickel and/or cobalt to be recovered remain in the alloy, and only the ORP value of the leaching solution increases. may present.
- the surface of the alloy is oxidized, a large amount of copper ions are eluted into the leachate along with the leaching with the acid solution, resulting in a leachate that increases the processing load in the subsequent reduction step.
- the operation of temporarily lowering the ORP value to ⁇ 100 mV or less is performed. conduct.
- Temporarily lowering to -100 mV or less means that in the leaching process for a predetermined time performed while controlling the ORP to 100 mV or more and less than 250 mV, the negative value of -100 mV or less is not continuous but only for a short period of time. It refers to lowering ORP.
- the length of the temporary time is not particularly limited, and can be, for example, about 5 minutes to 30 minutes.
- a specific means of temporarily lowering the ORP value to -100 mV or less is to temporarily reduce or stop the supply of the oxidant.
- the reducing agent may be temporarily added. After the ORP value is lowered to ⁇ 100 mV or less in this way, it is returned to the range of 100 mV or more and less than 250 mV by, for example, increasing the supply amount of the oxidizing agent to the original level.
- the operation to temporarily lower the ORP value to -100 mV or less should be performed at least once, more preferably intermittently multiple times, in the leaching treatment.
- the oxide film on the surface of the alloy can be easily removed, and the copper can be more effectively separated from the nickel and/or cobalt. It can be selectively leached.
- “Intermittently multiple times” means that once the ORP is lowered from the range of 100 mV or more and less than 250 mV to -100 mV or less, the ORP value is returned to the range of 100 mV or more and less than 250 mV each time. is returned, the leaching treatment is performed while controlling the voltage in the range of 100 mV or more and less than 250 mV for a predetermined time, and then the above operation (operation to lower to -100 mV or less) is repeated.
- the ORP value with respect to the reaction time transitions, for example, as shown in a graph (see FIG. 2 as a specific example) shown in the example described later.
- the number of times when the above operation is performed multiple times is not particularly limited, and it is preferable to adjust it appropriately according to the amount of alloy to be processed, processing time, etc.
- Reduction step S2 a reducing agent is added to the leaching solution obtained in the leaching treatment in the leaching step S1, and a reduction treatment is performed to obtain a reduction solution (post-reduction solution) containing nickel and/or cobalt and a reduction residue. get a reduction solution (post-reduction solution) containing nickel and/or cobalt and a reduction residue.
- the copper that constitutes the alloy is leached out by the acid and dissolved in the solution, and part of it may remain in the solution without reacting with the sulfiding agent. Therefore, in the reduction step S2, a copper-containing precipitate can be generated by reducing a trace amount of copper remaining in the obtained leachate, and the reduction residue containing the generated precipitate is separated by solid-liquid separation. Thus, a reducing solution containing nickel and/or cobalt from which copper is separated can be obtained. This allows selective separation of copper while maintaining a high nickel and/or cobalt leaching rate.
- the reducing agent is not particularly limited, but for example, a metal less base than copper can be used. Among them, it is preferable to use a metal containing nickel and/or cobalt and bring the leachate into contact with the metal to reduce copper. More specifically, the metal containing nickel and/or cobalt includes nickel and/or cobalt and copper, which are objects to be treated by the method according to the present embodiment, that is, to be leached in the leaching step S1. Alloys can be used.
- the reducing agent is not limited to one type of component, and may be a mixture of a plurality of components.
- sulfides can also be used as reducing agents.
- the sulfide may be in solid, liquid, or gaseous (gaseous) form. Alternatively, it may be a mixture of sulfur and powder of the alloy to be treated by the leaching treatment described above. When sulfur is used as the reducing agent, it may be added in an amount equivalent to copper contained in the treatment liquid or alloy powder.
- an alloy powder obtained by pulverizing the molten metal of the alloy to be processed may be used as the reducing agent.
- the powder containing nickel or cobalt in an amount equal to or greater than the equivalent amount required to reduce the copper in the leaching solution should be used. Just do it.
- the pH of the resulting post-reduction solution it is preferable to control the pH of the resulting post-reduction solution to 1.6 or less.
- the temperature of the liquid is preferably 50° C. or higher, which is the same as that of the leaching treatment.
- the time point at which the ORP becomes 0 mV or less can be used.
- an oxidation neutralization step S3 can be provided.
- a neutralizing agent and an oxidizing agent are added to the reducing solution obtained through the reduction step S2 to perform an oxidation-neutralization treatment, and the post-oxidation-neutralization solution and the oxidation-neutralization residue are combined. obtain.
- an oxidizing agent such as hydrogen peroxide or hypochlorous acid.
- the addition of the oxidizing agent is preferably controlled within a predetermined range by monitoring the oxidation-reduction potential (ORP) of the solution. Specifically, an oxidizing agent is added to the solution to control the ORP (using silver/silver chloride as a reference electrode) in the range of 380 mV to 430 mV, for example.
- a neutralizing agent is added to control the pH of the solution preferably within the range of 3.8 or more and 4.5 or less.
- the neutralizing agent is not particularly limited, it is preferable to use an alkali such as sodium hydroxide or potassium hydroxide.
- the oxidizing agent may be added after the neutralizing agent is added to the reducing liquid, or the oxidizing agent and the neutralizing agent may be added to the reducing liquid at the same time. It is preferred to add the neutralizing agent after adding the oxidizing agent. For example, when an oxidizing agent is added to a reducing solution whose pH has become high due to the addition of a neutralizing agent, if iron is contained as an impurity, the iron is not sufficiently oxidized, resulting in Fe(OH) 3 A precipitate (iron sediment) is no longer generated, and the separation of impurities may become insufficient.
- trace impurities that could not be removed even by the oxidation-neutralization treatment may be removed by providing a step of removing them by a known technique such as a solvent extraction method or an ion-exchange method after the oxidation-neutralization step S3. good.
- Example 1 (Leaching process) Waste lithium ion batteries (waste LIB) were subjected to oxidizing roasting by heating in an oxidizing atmosphere, and then dry treatment was performed by adding a reducing agent to the obtained oxidizing roasted product, heating and melting it, and reducing it. The molten alloy obtained by reduction melting was solidified to obtain powdery alloy powder having a particle size of less than 300 ⁇ m. The obtained alloy powder was used as an alloy to be treated (an alloy containing nickel, cobalt, and copper). Table 1 below shows the composition of the alloy powder analyzed using an ICP analyzer.
- pure water is put into a 500 mL separable flask with a baffle, and the amount of copper contained in the alloy powder and the amount of copper contained in the alloy powder are 1.25 equivalents (S-mol/Cu-mol).
- Elemental sulfur was added as a sulfurizing agent, and the mixture was heated to a set temperature of about 60° C. while stirring at a rotation speed of 1000 rpm.
- the oxidation-reduction potential (ORP) value (reference electrode: silver/silver chloride electrode) was adjusted by air bubbling at a flow rate of 0.5 L/min using a cylindrical gas ejection tube.
- ORP oxidation-reduction potential
- leaching of the alloy powder and pH adjustment were controlled by adding a 70% sulfuric acid solution at a rate of 14 mL/min to maintain pH 1.0.
- Example 1 the leaching treatment was performed while controlling the ORP in the range of 150 mV or more and less than 200 mV.
- Example 1 in the leaching treatment, the operation of temporarily lowering the ORP value to -100 mV or less was performed multiple times to reduce the alloy surface. ORP was controlled by adjusting the air flow rate.
- the end point of the reaction was the point where the air flow rate was gradually decreased after the ORP value reached 250 mV, and the ORP value was maintained at 250 mV or more without decreasing even after the air bubbling was stopped.
- the slurry after leaching was collected, solid-liquid separation was performed by filtration using a vacuum pump, and the quality of the filtrate (leaching liquid) after leaching and the leaching residue was analyzed with an ICP analyzer.
- Example 2 In Example 2, the leaching treatment was carried out in the same manner as in Example 1, except that the reaction temperature was about 80°C (set temperature). In Example 2, the operation of temporarily lowering the ORP value to -100 mV or less was performed multiple times in the leaching treatment, but the timing was partly different from the operation in Example 1 (see FIG. 2). reference).
- Comparative Example 1 In Comparative Example 1, the treatment was carried out without controlling the ORP. In addition, the operation of temporarily lowering the ORP value to -100 mV or less, which was performed in Examples 1 and 2, was not performed. Other than these, the same as in Example 1 was used.
- Table 2 summarizes the leaching conditions in Examples 1 and 2 and Comparative Example 1. 2 collectively shows the transition of the ORP value with respect to the leaching time in Examples 1 and 2 and Comparative Example 1, and FIG. 3 shows the transition of the ORP value with respect to the leaching time in Comparative Example 1. Table 3 below shows the analysis results of the leaching solutions and leaching residues of Examples 1 and 2 and Comparative Example 1.
- the leaching of nickel and cobalt was promoted by performing an operation in which the ORP value was set to a reducing atmosphere (negative value) during acid leaching.
- the ORP value was set to a reducing atmosphere (negative value) during acid leaching. This means that when the alloy surface is inactive (oxide film is already formed), the alloy surface can be activated (oxidized film is removed) by making it into a reducing atmosphere (ORP value is negative) at least once. This is believed to be due to the fact that selective leaching of nickel and cobalt could be promoted.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
- Electrochemistry (AREA)
Abstract
Description
[浸出処理について]
浸出工程S1では、ニッケル及び/又はコバルトと銅とを含む合金(以下、単に「合金」ともいう)に対して酸による浸出処理を施す。このとき、合金を酸に接触させる前、あるいは合金に酸を接触させるのと同時に、硫化剤を添加して、その硫化剤が共存する条件下で浸出処理を施す。このような浸出処理により、ニッケル及び/又はコバルトを溶解した浸出液と、主として硫化銅を含む浸出残渣とを得る。
・Cu+S → CuS ・・[1]
・Ni+H2SO4+1/2O2 → NiSO4+H2O ・・[2]
・Co+H2SO4+1/2O2 → CoSO4+H2O ・・[3]
・H2S+1/2O2 → S+H2O ・・[4]
・CuS+2O2 → CuSO4 ・・[5]
処理対象である合金、すなわち廃リチウムイオン電池を熔解して得られる合金として、板状に鋳造した合金、線状に引き抜き適宜切断して棒材とした合金、粉状の合金(以下、粉状の合金を「合金粉」とも称する)等、その形状は特に限定はされない。その中でも、粉状の合金粉を処理対象とすることで、より効果的にかつ効率的に浸出処理を施すことができ、好ましい。
浸出処理に用いる酸溶液としては、特に限定されず、硫酸、塩酸、硝酸等の鉱酸を用いることができる。また、これらの鉱酸の混合溶液を用いてもよい。さらに、例えば硫酸中に塩化物を含有させた酸溶液を用いてもよい。その中でも、処理対象の合金が、廃リチウムイオン電池に由来するものである場合、その廃リチウムイオン電池をリサイクルして再びリチウムイオン電池原料に供する理想的な循環方法である所謂「バッテリー トゥ バッテリー」を実現するにあたっては、硫酸を含む酸を使用することが好ましい。硫酸を用いることで、リチウムイオン電池の正極材に利用しやすい硫酸塩の形態で浸出液を得ることができる。
酸と共に添加する硫化剤としては、水硫化ナトリウムや単体硫黄を用いることができる。単体硫黄を用いる場合、反応が進みやすいように適度に粉砕することが好ましい。
浸出処理における温度や時間や、得られるスラリー濃度等の条件については、予備試験を行って適切な範囲を定めることが好ましい。また、浸出処理では、均一な反応が進行するように、エアー等で浸出液をバブリングしてもよい。さらに、浸出処理では、2価の銅イオンを添加してもよく、これにより2価の銅イオンが触媒として作用して浸出反応を促進させることができる。
pH条件については、得られる浸出液のpHが0.8以上1.6以下の範囲となるように制御して処理することが好ましい。これらのような範囲で浸出処理を施すことで、浸出が促進されるとともに、析出した硫化銅が過剰に酸化されて再溶解する事態をより効果的に抑制することができる。
本実施の形態に係る方法では、酸化還元電位(ORP)を、銀/塩化銀電極を参照電極とする値で100mV以上250mV未満に制御しながら浸出処理を施す。より好ましくは、ORPを150mV以上200mV以下に制御する。ORPをこのような範囲に制御して浸出処理を施すことで、ニッケル及び/又はコバルトの浸出が促進されるとともに、析出した硫化銅が過剰に酸化されることで再溶解することを抑制でき、銅とニッケル及び/又はコバルトとをより効果的に浸出することができる。
・CuO+H2S → CuS+H2O ・・[6]
・CuSO4+H2S → CuS+H2SO4 ・・[7]
還元工程S2では、浸出工程S1での浸出処理で得られた浸出液に対して、還元剤を添加して還元処理を施し、ニッケル及び/又はコバルトを含む還元液(還元後液)と還元残渣とを得る。
本実施の形態に係る方法では、酸化中和工程S3を設けることができる。酸化中和工程S3では、還元工程S2を経て得られた還元液に対して中和剤と酸化剤とを添加して酸化中和処理を施し、酸化中和後液と酸化中和残渣とを得る。
(浸出工程)
廃リチウムイオン電池(廃LIB)を酸化雰囲気下で加熱する酸化焙焼を行い、その後、得られた酸化焙焼物に還元剤を添加して加熱熔融して還元する乾式処理を行った。還元熔融して得られた熔融状態の合金を凝固させ、粒径300μm未満の粉状の合金粉を得た。得られた合金粉を処理対象の合金(ニッケル及びコバルトと銅とを含む合金)として用いた。下記表1に、ICP分析装置を用いて分析した合金粉の組成を示す。
実施例2では、反応温度を約80℃(設定温度)としたこと以外は、実施例1と同様にして浸出処理を行った。なお、実施例2でも、浸出処理において、ORP値を一時的に-100mV以下に低下させる操作を複数回行っているが、実施例1での操作とは一部異なるタイミングとした(図2を参照)。
比較例1では、ORPの制御は行わずに成り行きにて処理を行った。また、実施例1及び2で行ったような、ORP値を一時的に-100mV以下に低下させる操作は行わなかった。それら以外は、実施例1と同様とした。
下記表2に、実施例1、2、及び比較例1での浸出処理の条件をまとめる。また、図2に、実施例1、2、及び比較例1における浸出時間に対するORP値の推移をまとめて示し、図3に、比較例1における浸出時間に対するORP値の推移を示す。そして、下記表3に、実施例1、2、及び比較例1のそれぞれの浸出液と浸出残渣の分析結果を示す。
Claims (5)
- ニッケル及び/又はコバルトと銅とを含む合金から、ニッケル及び/又はコバルトを含む溶液を得る合金の処理方法であって、
前記合金に対して硫化剤が共存する状態で酸溶液を添加し、酸化還元電位(参照電極を銀/塩化銀電極とする)を100mV以上250mV未満に制御しながら浸出処理を施すことにより、浸出液と浸出残渣とを得る浸出工程を含み、
前記浸出工程では、前記浸出処理において、前記酸化還元電位を一時的に-100mV以下に低下させる操作を行う、
合金の処理方法。 - 前記浸出工程では、酸化還元電位を一時的に-100mV以下に低下させる前記操作を、前記浸出処理において断続的に複数回行う、
請求項1に記載の合金の処理方法。 - 前記浸出工程を経て得られた前記浸出液に対して還元剤を添加して還元処理を施し、還元後液と還元残渣とを得る還元工程を、さらに含む、
請求項1に記載の合金の処理方法。 - 前記還元工程を経て得られた前記還元液に対して中和剤と酸化剤とを添加して酸化中和処理を施し、酸化中和後液と酸化中和残渣とを得る酸化中和工程を、さらに含む、
請求項1に記載の合金の処理方法。 - 前記合金は、リチウムイオン電池の廃電池を熔解して得られた合金を含む、
請求項1乃至4のいずれかに記載の合金の処理方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3231411A CA3231411A1 (en) | 2021-09-10 | 2022-08-24 | Method for processing alloy |
JP2023504377A JP7279873B1 (ja) | 2021-09-10 | 2022-08-24 | 合金の処理方法 |
CN202280061003.9A CN117916395A (zh) | 2021-09-10 | 2022-08-24 | 合金的处理方法 |
KR1020247007943A KR20240047405A (ko) | 2021-09-10 | 2022-08-24 | 합금의 처리 방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021147750 | 2021-09-10 | ||
JP2021-147750 | 2021-09-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023037876A1 true WO2023037876A1 (ja) | 2023-03-16 |
Family
ID=85506634
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/031842 WO2023037876A1 (ja) | 2021-09-10 | 2022-08-24 | 合金の処理方法 |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP7279873B1 (ja) |
KR (1) | KR20240047405A (ja) |
CN (1) | CN117916395A (ja) |
CA (1) | CA3231411A1 (ja) |
WO (1) | WO2023037876A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012172169A (ja) | 2011-02-18 | 2012-09-10 | Sumitomo Metal Mining Co Ltd | 有価金属回収方法 |
JP2019065346A (ja) * | 2017-09-29 | 2019-04-25 | 住友金属鉱山株式会社 | 銅とニッケルおよびコバルトの分離方法 |
JP2019081915A (ja) * | 2017-10-27 | 2019-05-30 | 住友金属鉱山株式会社 | 銅とニッケルおよびコバルトの分離方法 |
WO2021166755A1 (ja) * | 2020-02-21 | 2021-08-26 | 住友金属鉱山株式会社 | 合金の処理方法 |
-
2022
- 2022-08-24 WO PCT/JP2022/031842 patent/WO2023037876A1/ja active Application Filing
- 2022-08-24 CA CA3231411A patent/CA3231411A1/en active Pending
- 2022-08-24 CN CN202280061003.9A patent/CN117916395A/zh active Pending
- 2022-08-24 JP JP2023504377A patent/JP7279873B1/ja active Active
- 2022-08-24 KR KR1020247007943A patent/KR20240047405A/ko unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012172169A (ja) | 2011-02-18 | 2012-09-10 | Sumitomo Metal Mining Co Ltd | 有価金属回収方法 |
JP2019065346A (ja) * | 2017-09-29 | 2019-04-25 | 住友金属鉱山株式会社 | 銅とニッケルおよびコバルトの分離方法 |
JP2019081915A (ja) * | 2017-10-27 | 2019-05-30 | 住友金属鉱山株式会社 | 銅とニッケルおよびコバルトの分離方法 |
WO2021166755A1 (ja) * | 2020-02-21 | 2021-08-26 | 住友金属鉱山株式会社 | 合金の処理方法 |
Also Published As
Publication number | Publication date |
---|---|
CN117916395A (zh) | 2024-04-19 |
CA3231411A1 (en) | 2023-03-16 |
KR20240047405A (ko) | 2024-04-12 |
JPWO2023037876A1 (ja) | 2023-03-16 |
JP7279873B1 (ja) | 2023-05-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6915497B2 (ja) | 銅とニッケルおよびコバルトの分離方法 | |
EP3730637A1 (en) | Method for separating copper, and nickel and cobalt | |
JP7136360B2 (ja) | 合金の処理方法 | |
JP6958235B2 (ja) | 銅とニッケルおよびコバルトの分離方法 | |
JP7052635B2 (ja) | 銅とニッケル及びコバルトの分離方法 | |
JP7392539B2 (ja) | 合金の処理方法 | |
JP7279873B1 (ja) | 合金の処理方法 | |
WO2023033023A1 (ja) | 合金の処理方法 | |
JP7311054B2 (ja) | 合金の処理方法 | |
WO2023002912A1 (ja) | 合金の処理方法 | |
WO2023106210A1 (ja) | 合金の処理方法 | |
JP7245423B1 (ja) | 合金の処理方法 | |
JP7392538B2 (ja) | 合金の処理方法 | |
JP7420203B2 (ja) | 合金の処理方法 | |
JP2023035964A (ja) | 合金の処理方法 | |
CN117916396A (zh) | 合金的处理方法 | |
CN117730165A (zh) | 合金的处理方法 | |
JP2022033492A (ja) | 硫化物の処理方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 2023504377 Country of ref document: JP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22867198 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20247007943 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280061003.9 Country of ref document: CN Ref document number: 3231411 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022867198 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2022867198 Country of ref document: EP Effective date: 20240410 |