JP7409165B2 - 廃電池からの有価金属回収方法 - Google Patents
廃電池からの有価金属回収方法 Download PDFInfo
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- 229910052751 metal Inorganic materials 0.000 title claims description 85
- 239000002184 metal Substances 0.000 title claims description 85
- 238000000034 method Methods 0.000 title claims description 79
- 150000002739 metals Chemical class 0.000 title claims description 65
- 239000010926 waste battery Substances 0.000 title claims description 37
- 239000000463 material Substances 0.000 claims description 67
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 26
- 238000007873 sieving Methods 0.000 claims description 21
- 238000002844 melting Methods 0.000 claims description 20
- 230000008018 melting Effects 0.000 claims description 20
- 239000010941 cobalt Substances 0.000 claims description 14
- 229910017052 cobalt Inorganic materials 0.000 claims description 14
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 14
- 229910052759 nickel Inorganic materials 0.000 claims description 13
- 230000001590 oxidative effect Effects 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- 239000000956 alloy Substances 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 19
- 238000011084 recovery Methods 0.000 description 18
- 229910052799 carbon Inorganic materials 0.000 description 17
- 239000012535 impurity Substances 0.000 description 15
- 238000011282 treatment Methods 0.000 description 15
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 12
- 229910001416 lithium ion Inorganic materials 0.000 description 12
- 239000007789 gas Substances 0.000 description 10
- 238000012545 processing Methods 0.000 description 10
- 230000003647 oxidation Effects 0.000 description 9
- 238000007254 oxidation reaction Methods 0.000 description 9
- 239000000843 powder Substances 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 239000007774 positive electrode material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010309 melting process Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 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
- 239000003792 electrolyte Substances 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 239000007773 negative electrode material Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
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- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
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- 238000002485 combustion reaction Methods 0.000 description 1
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- 230000018044 dehydration Effects 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 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
- 239000006148 magnetic separator Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000012254 powdered material Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
- B09B3/35—Shredding, crushing or cutting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
- B02C13/16—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters hinged to the rotor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/70—Chemical treatment, e.g. pH adjustment or oxidation
-
- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22B1/02—Roasting processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/005—Preliminary treatment of ores, e.g. by roasting or by the Krupp-Renn process
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B23/00—Obtaining nickel or cobalt
- C22B23/02—Obtaining nickel or cobalt by dry 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
-
- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- 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
- C22B7/005—Separation by a physical processing technique only, e.g. by mechanical breaking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/26—Details
- B02C13/28—Shape or construction of beater elements
- B02C2013/2816—Shape or construction of beater elements of chain, rope or cable type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
- B03B2009/066—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B2101/00—Type of solid waste
- B09B2101/15—Electronic waste
- B09B2101/16—Batteries
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- 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
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- 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
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- 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
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- 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
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- Metallurgy (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
- Secondary Cells (AREA)
- Crushing And Pulverization Processes (AREA)
Description
本実施の形態に係る有価金属の回収方法は、廃電池から有価金属を回収する方法である。一般的に、廃電池から有価金属を回収するにあたっては、乾式処理に加えて湿式処理を行う場合があるが、本実施の形態に係る有価金属回収方法は、主として乾式処理に関わる。
図1は、本実施の形態に係る有価金属回収方法の流れの一例を示す工程図である。この有価金属回収方法は、廃電池を焙焼する焙焼工程S1と、チェーンミルを用いて焙焼物を破砕する破砕工程S2と、破砕物に対して篩別処理を施して篩上物となる塊状物と篩下物となる粉末とに分離する篩別工程S3と、を有する。ここで、ニッケルやコバルト等の有価金属は、正極活物質に含まれる金属で、粉末状で回収されることになるため篩下物に多く分配される。
焙焼工程S1は、廃電池に含有される電解液成分であるフッ素成分等を取り除いて無害化し、また、次工程での破砕を容易とすることを主な目的とする。
破砕工程S2では、焙焼工程S1にて廃電池を焙焼して得られた焙焼物を、破砕し、細かく分離する。このとき、本実施の形態に係る有価金属回収方法では、焙焼物を破砕容器に入れて、チェーンミルを用いた破砕処理を施すことを特徴としている。
図2は、チェーンミルを用いた破砕処理の一例について説明するための図である。図2に示すように、破砕処理は、チェーンミル装置2を備えた破砕容器1の内部にて行われる。破砕容器1は、試料投入口11と、試料回収口12と、ガス給排気管13とを備える。また、破砕容器1内部の処理空間には、チェーンミル装置2が設けられている。
より具体的に、回転軸棒21は、後述するチェーン22が側面の所定位置に取り付けられ、軸を中心として回動することで、側面に取り付けたチェーンを処理空間内において回転させる。なお、回転軸棒21に取り付けるチェーンの数は、特に限定されないが、2つ以上であることが好ましい。この点については後述する。
チェーン22は、上述したように回転軸棒21の側面に取り付けられ、回転軸棒21の回動により回転し、破砕対象である焙焼物を衝突させて破砕する。チェーン22は、金属製のリングが所定の長さに連なって構成されている(図2の模式図を参照)。
篩別工程S3では、破砕工程S2における破砕処理により得られた破砕物を、所定の目開きの篩(篩機)を用いて篩上物と篩下物とに篩別けして分離する。特に廃電池の場合、有価金属を多く含む正極活物質は破砕によって粉状化し、篩下に分配される。そのため、篩別けにより篩下物と篩上物とに分離することで、有価金属を効率的に回収できる。
次に、酸化焙焼工程S4では、篩別工程S3で得られた篩下物を酸化雰囲気下で焙焼する。酸化焙焼工程S4での焙焼処理により、篩下物に含まれる炭素成分(カーボン)を酸化して除去することができる。具体的に、得られる酸化焙焼物中の炭素の含有量をほぼ0質量%とする。
還元熔融工程S5では、酸化焙焼工程S4での焙焼処理により得られた酸化焙焼物を還元熔融することにより、不純物を含むスラグと、有価金属を含有する合金(メタル)とを得る。還元熔融工程S5では、酸化焙焼処理にて酸化させて得られた、不純物元素の酸化物はそのままで、その酸化焙焼処理で酸化してしまった有価金属の酸化物については還元及び熔融させることにより、不純物と分離して還元物を一体化した合金を得ることができる。なお、熔融物として得られる合金を「熔融合金」ともいう。
(焙焼工程)
廃電池として、外形が角形をした車載用のリチウムイオン電池の使用済み品を用意した。この廃電池を大気雰囲気下で920℃の温度で6時間かけて焙焼した。
次に、破砕工程では、焙焼工程から得られた焙焼物を1バッチ10kgとして破砕容器に入れて、破砕機としてチェーンミルを用いて破砕処理を施した(図2の模式図を参照)。具体的に、実施例1~10では、下記表1に示す破砕条件にて処理した。なお、実施例8~10では、チェーンの取り付け箇所数を4つとし、2種類の取り付け高さ位置のパターンでそれぞれ2本ずつ設置して粉砕処理を施した。
次に、篩別工程では、破砕機から回収した1バッチ分の破砕物を秤量し、直径2.0mmの孔が多数開口した金属(ステンレス)板を篩に用いた篩機にかけ、篩別けした。
下記表1に、実施例1~10及び比較例1における、篩下物と篩上物のそれぞれのニッケル、コバルトの含有量分析値に基づくニッケル、コバルトの分配率の測定結果を示す。
1F 底面(破砕容器の内部の底面)
11 試料投入口
12 試料回収口
13 ガス給排気管
2 チェーンミル装置
21 回転軸棒
22 チェーン
Claims (4)
- 廃電池を焙焼する焙焼工程と、
焙焼物を破砕容器に入れてチェーンミルを用いて破砕する破砕工程と、
破砕物を篩別けして篩上物と篩下物とに分離する篩別工程と、を有し、
前記破砕工程における破砕処理に用いるチェーンミルは、
前記破砕容器の底面に対して垂直に立設された回転軸棒と、
前記回転軸棒の側面に取り付けられるチェーンと、を備えており、
前記回転軸棒における前記チェーンの取り付け高さを調節できる構造を有し、
前記チェーンミルは、
前記破砕容器の底面からの距離が10mm以上100mm以下の範囲となる取り付け位置に前記チェーンが取り付けられている
廃電池からの有価金属回収方法。 - 前記チェーンミルは、
前記回転軸棒の側面においてその回転方向に2箇所以上の取り付け位置が設けられ、その取り付け位置のそれぞれに前記チェーンが取り付けられている
請求項1に記載の廃電池からの有価金属回収方法。 - 前記篩下物を酸化焙焼する酸化焙焼工程と、
酸化焙焼物を還元熔融して、スラグと、有価金属を含有する合金とを得る還元熔融工程と、をさらに有する、
請求項1又は2に記載の廃電池からの有価金属回収方法。 - 前記有価金属は、少なくとも、コバルト、ニッケル、及び銅からなる群から選ばれる1種以上を含む、
請求項1乃至3のいずれかに記載の廃電池からの有価金属回収方法。
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