CA2961441A1 - Method for processing and removing electronic waste with a view to recovering the components included in such waste - Google Patents
Method for processing and removing electronic waste with a view to recovering the components included in such waste Download PDFInfo
- Publication number
- CA2961441A1 CA2961441A1 CA2961441A CA2961441A CA2961441A1 CA 2961441 A1 CA2961441 A1 CA 2961441A1 CA 2961441 A CA2961441 A CA 2961441A CA 2961441 A CA2961441 A CA 2961441A CA 2961441 A1 CA2961441 A1 CA 2961441A1
- Authority
- CA
- Canada
- Prior art keywords
- waste
- metals
- suspension
- particles
- separation
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000002699 waste material Substances 0.000 title claims abstract description 30
- 239000010793 electronic waste Substances 0.000 title claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 62
- 239000002184 metal Substances 0.000 claims abstract description 62
- 150000002739 metals Chemical class 0.000 claims abstract description 52
- 239000002245 particle Substances 0.000 claims abstract description 27
- 238000000227 grinding Methods 0.000 claims abstract description 20
- 239000000725 suspension Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 238000000926 separation method Methods 0.000 claims description 38
- 239000002923 metal particle Substances 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 8
- 238000007885 magnetic separation Methods 0.000 claims description 6
- 239000000470 constituent Substances 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 5
- 239000000080 wetting agent Substances 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 238000005453 pelletization Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000008030 elimination Effects 0.000 claims description 2
- 238000003379 elimination reaction Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 11
- 238000011282 treatment Methods 0.000 description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 241000277284 Salvelinus fontinalis Species 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000002609 medium Substances 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000012736 aqueous medium Substances 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000009854 hydrometallurgy Methods 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- 239000013528 metallic particle Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 150000002843 nonmetals Chemical class 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 239000011135 tin Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000011138 biotechnological process Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002013 dioxins Chemical class 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
-
- 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
- B03B9/061—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial
-
- 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
-
- 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
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
-
- 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
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/48—Washing granular, powdered or lumpy materials; Wet separating by mechanical classifiers
-
- 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
-
- 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
-
- 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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
- C22B7/006—Wet 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
-
- 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
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Solid Wastes (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
According to the invention, a method for treating electronic waste with a view to individually recovering metals included in such waste is provided. Said method is characterized in that it includes the series of the following steps: grinding the waste under conditions suitable for individually separating the different metal components of the waste; mixing the ground waste with a liquid such as to form a suspension; gravitationally separating the suspension such as to separate the particles having the highest densities and containing the majority of the metals from the particles having the lowest densities; and densimetrically separating the suspension containing the majority of the metals such as to obtain suspensions containing the individually separated metals.
Description
Method for processing and removing electronic waste with a view to recovering the components included in such waste Field of the invention The present invention relates to the treatment of articles comprising plastic materials and various metals, and in particular electronic waste, with a view to recovering materials forming the latter, and in particular the metals used in the production of such waste.
This waste may comprise circuit boards, memory cards, smart cards, and any other circuit or article provided with discrete or integrated electronic components.
Prior art This electronic waste essentially comprises two familles of materials, namely on the one hand polymer materials, and on the other hand metals, some precious and others less so, and in particular (but not exhaustively) silver, copper, iron, lead, tin, gold, silver, aluminum, tantalum, palladium, and rare-earth metals (lanthanides).
The recovery of these metals is today an extremely important challenge with regard to environmental motivations that aim to recover and recycle unusable or deteriorated waste, and the increasing rarity of certain metals.
There is therefore not only an economic benefit, but also an environmental benefit in treating this waste in order to recover therefrom the materials capable of being reused, and in particular the metals.
However, this treatment comes up against significant difficulties:
- the amount of each of the metals to be recovered is relatively small with regard to the total weight or the total volume of this waste;
- this same waste includes different metals which are a priori difficult to separate considering
This waste may comprise circuit boards, memory cards, smart cards, and any other circuit or article provided with discrete or integrated electronic components.
Prior art This electronic waste essentially comprises two familles of materials, namely on the one hand polymer materials, and on the other hand metals, some precious and others less so, and in particular (but not exhaustively) silver, copper, iron, lead, tin, gold, silver, aluminum, tantalum, palladium, and rare-earth metals (lanthanides).
The recovery of these metals is today an extremely important challenge with regard to environmental motivations that aim to recover and recycle unusable or deteriorated waste, and the increasing rarity of certain metals.
There is therefore not only an economic benefit, but also an environmental benefit in treating this waste in order to recover therefrom the materials capable of being reused, and in particular the metals.
However, this treatment comes up against significant difficulties:
- the amount of each of the metals to be recovered is relatively small with regard to the total weight or the total volume of this waste;
- this same waste includes different metals which are a priori difficult to separate considering
- 2 -their similar properties, in particular in terms of densities for certain metals;
- the presence of polymer materials in the waste further complicates the treatments.
Thus, the known techniques for recovering metals in waste comprising only a single type of metal, in particular by refining or melting, cannot be used directly for such applications.
Therefore, processes that aim to recover various metals contained in electronic waste have already been developed.
In a first known process, based on pyrometallurgy, the waste is sequentially subjected to:
- a heat treatment in order to homogenize the source of metal (roasting) and to separate the plastics and the refractory oxides;
- an oxidation that enables the separation; and - a refining.
Such a process is particularly used for recovering copper, nickel or zinc.
However, this known process bas drawbacks, and in particular:
- the fact of burning the plastic materials and other inflammable materials has harmful consequences in terms of the environment, in particular by the emission of furans and dioxins;
- it calls for a chemical treatment, the environmental consequences of which are significant;
- it is energy intensive and requires long treatment times;
- it is limited to the recovery of certain metals, excluding in particular aluminum, iron and tantalum.
A process referred to as a hydrometallurgical process bas also already been proposed, which is based on the use of a solvent, and in particular of an acid or a halide, followed by separation and purification processes
- the presence of polymer materials in the waste further complicates the treatments.
Thus, the known techniques for recovering metals in waste comprising only a single type of metal, in particular by refining or melting, cannot be used directly for such applications.
Therefore, processes that aim to recover various metals contained in electronic waste have already been developed.
In a first known process, based on pyrometallurgy, the waste is sequentially subjected to:
- a heat treatment in order to homogenize the source of metal (roasting) and to separate the plastics and the refractory oxides;
- an oxidation that enables the separation; and - a refining.
Such a process is particularly used for recovering copper, nickel or zinc.
However, this known process bas drawbacks, and in particular:
- the fact of burning the plastic materials and other inflammable materials has harmful consequences in terms of the environment, in particular by the emission of furans and dioxins;
- it calls for a chemical treatment, the environmental consequences of which are significant;
- it is energy intensive and requires long treatment times;
- it is limited to the recovery of certain metals, excluding in particular aluminum, iron and tantalum.
A process referred to as a hydrometallurgical process bas also already been proposed, which is based on the use of a solvent, and in particular of an acid or a halide, followed by separation and purification processes
- 3 -for instance by precipitation of the impurities, extraction of the solvent, adsorption and ion exchange in order to isolate and concentrate the metals.
For example, oxidation of electronic waste by sulfuric acid enables the leaching of the copper and of the silver, whereas cyanidation makes it possible to recover gold, silver, palladium and a small amount of copper.
The hydrometallurgical process is resorted to in particular for aluminum, zinc and copper, but also for nickel, chromium and manganese.
However, this known process uses large amounts of acid, which is a great handicap in terms of the environment and safety.
Biotechnological processes that require bacteria or fungi have also been proposed, in a known manner.
However, these processes are still in the experimental phase and have not yet proven their effectiveness, in particular with regard to economic and environmental criteria.
Finally, a technique is known from the document "A
Novel Flowsheet for the Recovery of Metal Values from Waste Printed Circuit Boards" that makes it possible, via a combination of wet-phase treatments (sizing by hydrocycloning, flotation and multi-gravity separation) and dry-phase treatments (electrodynamic and electrostatic separations), to separate the constituents of ground printed circuit boards into, on the one hand, a light fraction (essentially plastic materials) and, on the other hand, a heavy fraction (essentially metals).
However, this known process results in a mediocre separation performance, and proves to be incapable of separating the metals from one another.
Furthermore, the teaching of this document indicates (see table 1 on page 465) that an effective separation occurs only for particle sizes between 44 and 100 pm and that smaller particles should be removed.
For example, oxidation of electronic waste by sulfuric acid enables the leaching of the copper and of the silver, whereas cyanidation makes it possible to recover gold, silver, palladium and a small amount of copper.
The hydrometallurgical process is resorted to in particular for aluminum, zinc and copper, but also for nickel, chromium and manganese.
However, this known process uses large amounts of acid, which is a great handicap in terms of the environment and safety.
Biotechnological processes that require bacteria or fungi have also been proposed, in a known manner.
However, these processes are still in the experimental phase and have not yet proven their effectiveness, in particular with regard to economic and environmental criteria.
Finally, a technique is known from the document "A
Novel Flowsheet for the Recovery of Metal Values from Waste Printed Circuit Boards" that makes it possible, via a combination of wet-phase treatments (sizing by hydrocycloning, flotation and multi-gravity separation) and dry-phase treatments (electrodynamic and electrostatic separations), to separate the constituents of ground printed circuit boards into, on the one hand, a light fraction (essentially plastic materials) and, on the other hand, a heavy fraction (essentially metals).
However, this known process results in a mediocre separation performance, and proves to be incapable of separating the metals from one another.
Furthermore, the teaching of this document indicates (see table 1 on page 465) that an effective separation occurs only for particle sizes between 44 and 100 pm and that smaller particles should be removed.
- 4 -Moreover, this document appears to indicate that the grinding of circuit boards produces large amounts of nonmetallic fines and of metal particles of elongated shape, which would a priori complicate a completely mechanized separation process.
Thus, for want of satisfactory industrial solutions, there are still many regions of the world where electronic waste is simply burnt, in order to attempt to recover a small portion of the metals. These processes are however a disaster in terms of the environment and health, and ultimately only enable a minimal recovery of materials.
Summary of the invention The present invention aims to overcome ail or some of the drawbacks of the prior art and to propose a process that makes it possible to individually recover various metals included in the composition of electronic waste, with a satisfactory degree of purity, while requiring neither heat input nor reactants, and that does not produce undesirable emissions. It is based on the discovery of the fact that, by carrying out a fragmentation of this waste with certain particle size characteristics, making it possible to individually separate the constituents of the waste, and by conveying these fragments in a liquid medium from one end to the other of the separation process, it was possible to apply thereto extremely effective mechanical separation treatments, without recourse to reactants, without undesirable emissions and with a limited energy consumption.
A process is thus proposed for treating electronic waste with a view to individually recovering metals included in such waste, characterized in that it comprises the series of the following steps:
- grinding the waste under conditions suitable for individually separating the various metal constituents of the waste,
Thus, for want of satisfactory industrial solutions, there are still many regions of the world where electronic waste is simply burnt, in order to attempt to recover a small portion of the metals. These processes are however a disaster in terms of the environment and health, and ultimately only enable a minimal recovery of materials.
Summary of the invention The present invention aims to overcome ail or some of the drawbacks of the prior art and to propose a process that makes it possible to individually recover various metals included in the composition of electronic waste, with a satisfactory degree of purity, while requiring neither heat input nor reactants, and that does not produce undesirable emissions. It is based on the discovery of the fact that, by carrying out a fragmentation of this waste with certain particle size characteristics, making it possible to individually separate the constituents of the waste, and by conveying these fragments in a liquid medium from one end to the other of the separation process, it was possible to apply thereto extremely effective mechanical separation treatments, without recourse to reactants, without undesirable emissions and with a limited energy consumption.
A process is thus proposed for treating electronic waste with a view to individually recovering metals included in such waste, characterized in that it comprises the series of the following steps:
- grinding the waste under conditions suitable for individually separating the various metal constituents of the waste,
- 5 -- mixing the ground waste with a liquid to form a suspension, - separating, by gravity, the suspension in order to separate the particles of highest densities, containing most of the metals, from the particles of lowest densities, - separating, by density, the suspension containing most of the metals in order to obtain suspensions containing the individually separated metals.
Certain advantageous but optional features of this process, taken individually or in any combination that a person skilled in the art will identify as technically compatible, are the following:
* the mean size of the metal particles after the grinding step is between around 10 and 100 pm, and more preferentially between 20 and 50 pm;
* the metal particles have, after grinding, a distribution value D80 between around 25 and 60 pm;
* et least one final phase of the grinding is carried out by attrition;
* the gravity separation step is carried out by hydrocycloning;
* the proportion of solids in the suspension is between around 5% and 30% by weight, preferably between around 8% and 15% by weight;
* the liquid is water, the suspension additionally containing a wetting agent;
* the wetting agent is nonionic;
* the density separation step is carried out by one or more separation a machines selected from a group comprising centrifugal gravity separators, densimetric tables, flotation-type separators, spiral concentrators and multi-gravity drum separators;
* the process comprises a set of separation machines connected in cascade and set to different density ranges;
* the process comprises, before the density
Certain advantageous but optional features of this process, taken individually or in any combination that a person skilled in the art will identify as technically compatible, are the following:
* the mean size of the metal particles after the grinding step is between around 10 and 100 pm, and more preferentially between 20 and 50 pm;
* the metal particles have, after grinding, a distribution value D80 between around 25 and 60 pm;
* et least one final phase of the grinding is carried out by attrition;
* the gravity separation step is carried out by hydrocycloning;
* the proportion of solids in the suspension is between around 5% and 30% by weight, preferably between around 8% and 15% by weight;
* the liquid is water, the suspension additionally containing a wetting agent;
* the wetting agent is nonionic;
* the density separation step is carried out by one or more separation a machines selected from a group comprising centrifugal gravity separators, densimetric tables, flotation-type separators, spiral concentrators and multi-gravity drum separators;
* the process comprises a set of separation machines connected in cascade and set to different density ranges;
* the process comprises, before the density
- 6 separation step, a magnetic separation step;
* the process additionally comprises a final packaging step comprising an elimination of the liquid and a pelletizing of the separated metals.
Brief description of the drawings The invention will be better understood in light of the following description of preferred embodiments thereof, given by way of nonlimiting example and with reference to the appended drawings, in which the sole figure is a block diagram of the various steps of the process of the invention.
Detailed description of preferred embodiments With reference to the drawing, the various steps of the process of the invention and means for carrying out these steps will be described below.
The process comprises the following steps.
Step 1: micronization This step comprises a grinding of the electronic waste (whole boards, smart card, etc.) until a powder of particles having a mean size preferably between 10 and 100 pm, and more preferentially between around 20 and 50 pm is obtained. This grinding may be carried out in one or more steps depending on the nature of the waste and the expected composition thereof, optionally with regrinding of the excessively coarse particles originating from a downstream particle size screening operation.
The targeted particle size here is that of the metals, it being possible for the grinding to give rise to coarser sizes of non-metallic particles (in particular plastics, which are more malleable) without compromising the effectiveness of the process.
Advantageously, the grinding is carried out under conditions such that the mean size of the metal particles
* the process additionally comprises a final packaging step comprising an elimination of the liquid and a pelletizing of the separated metals.
Brief description of the drawings The invention will be better understood in light of the following description of preferred embodiments thereof, given by way of nonlimiting example and with reference to the appended drawings, in which the sole figure is a block diagram of the various steps of the process of the invention.
Detailed description of preferred embodiments With reference to the drawing, the various steps of the process of the invention and means for carrying out these steps will be described below.
The process comprises the following steps.
Step 1: micronization This step comprises a grinding of the electronic waste (whole boards, smart card, etc.) until a powder of particles having a mean size preferably between 10 and 100 pm, and more preferentially between around 20 and 50 pm is obtained. This grinding may be carried out in one or more steps depending on the nature of the waste and the expected composition thereof, optionally with regrinding of the excessively coarse particles originating from a downstream particle size screening operation.
The targeted particle size here is that of the metals, it being possible for the grinding to give rise to coarser sizes of non-metallic particles (in particular plastics, which are more malleable) without compromising the effectiveness of the process.
Advantageously, the grinding is carried out under conditions such that the mean size of the metal particles
- 7 -after the grinding step is as defined above and such that the distribution of the size of the metal particles has a distribution value D80 between around 25 and 60 pm. It will be recalled here that a distribution value D80 is the size of particles for which 80% of the particles have a size lower than this value.
It should be pointed out here that grinding with such a particle size makes it possible te ensure that the various constituents of the electronic products treated are individually separated well enough te be able te guarantee the good quality of the subsequent separation steps, as will be described.
Various suppliers sell machines based on various grinding technologies (ball mills, attrition mills, knife mills, centrifugal mills, etc.) and which are capable of carrying out this grinding, and in particular the company Poittemill, Béthune, France, the company Manfredini &
Schianti, Sasuollo, Italy, the company Atritor, Coventry, United Kingdom, the company Pulveris, Aniche, France, or else the company Hosokawa Alpine, Augsburg, Germany.
Furthermore, it is advantageous for the type of grinding te be chosen se as te give a mean size of metal particles smaller than the mean size of non-metallic particles. This makes it possible, on the one hand, te make the metals/nonmetals separation less time-consuming and, on the other hand, te improve the performance of the separation of the metals from one another.
Attrition grinding makes it possible in particular te lead te this result.
Step 2: aqueous suspending The particles micronized in step 1 are introduced into an aqueous medium, preferably water, in a proportion of around 8% te 15% by weight of solids; this suspending may be carried out by stirring in a tank; if necessary, a wetting agent such as a surfactant, which is preferably
It should be pointed out here that grinding with such a particle size makes it possible te ensure that the various constituents of the electronic products treated are individually separated well enough te be able te guarantee the good quality of the subsequent separation steps, as will be described.
Various suppliers sell machines based on various grinding technologies (ball mills, attrition mills, knife mills, centrifugal mills, etc.) and which are capable of carrying out this grinding, and in particular the company Poittemill, Béthune, France, the company Manfredini &
Schianti, Sasuollo, Italy, the company Atritor, Coventry, United Kingdom, the company Pulveris, Aniche, France, or else the company Hosokawa Alpine, Augsburg, Germany.
Furthermore, it is advantageous for the type of grinding te be chosen se as te give a mean size of metal particles smaller than the mean size of non-metallic particles. This makes it possible, on the one hand, te make the metals/nonmetals separation less time-consuming and, on the other hand, te improve the performance of the separation of the metals from one another.
Attrition grinding makes it possible in particular te lead te this result.
Step 2: aqueous suspending The particles micronized in step 1 are introduced into an aqueous medium, preferably water, in a proportion of around 8% te 15% by weight of solids; this suspending may be carried out by stirring in a tank; if necessary, a wetting agent such as a surfactant, which is preferably
- 8 -nonionic and nonfoaming, is incorporated into the aqueous medium to facilitate the suspending.
This liquid medium remains the carrier for the micronized particles throughout ail the subsequent steps, and will be eliminated at the end of the separation as will be seen below.
Step 3: metals/nonmetals separation This step is preferably carried out with a hydrocyclone-type separation device, making it possible to separate, on the one hand, the particles of highest densities (typically ail of the metals) and, on the other hand, the particles of lowest densities, typically the polymers and other nonmetallic particles. In a manner known per se, the densest particles are projected against the conical wall of the hydrocyclone and are discharged from the hydrocyclone through its lower opening (underflow), whilst the lighter particles rise up through the upward secondary vortex and form a flow referred to as an overflow that emerges through an upper opening.
By an optimal choice of the diameter of the cyclone, of its length and of the cone angle of the cyclone, of the outlet diameter of the overflow in the vortex finder, of the diameter of the spigot of the underflow, the heaviest particles (metals) are successfully directed toward the lower opening, whereas the lighter materials (polymers) in suspension in the solution rise up in the upward vortex and exit through the upper opening, with a possibility of fine adjustment of the density threshold.
Use is made, for example, of a hydrocyclone manufactured by the company Salter Cyclones Ltd., Cheltenham, United Kingdom, the company FLSmidth & Krebbs, Valby, Denmark, the company Neyrtec Minerai, Lorient, France, or else the company Multotec, Johannesburg, South Africa.
This liquid medium remains the carrier for the micronized particles throughout ail the subsequent steps, and will be eliminated at the end of the separation as will be seen below.
Step 3: metals/nonmetals separation This step is preferably carried out with a hydrocyclone-type separation device, making it possible to separate, on the one hand, the particles of highest densities (typically ail of the metals) and, on the other hand, the particles of lowest densities, typically the polymers and other nonmetallic particles. In a manner known per se, the densest particles are projected against the conical wall of the hydrocyclone and are discharged from the hydrocyclone through its lower opening (underflow), whilst the lighter particles rise up through the upward secondary vortex and form a flow referred to as an overflow that emerges through an upper opening.
By an optimal choice of the diameter of the cyclone, of its length and of the cone angle of the cyclone, of the outlet diameter of the overflow in the vortex finder, of the diameter of the spigot of the underflow, the heaviest particles (metals) are successfully directed toward the lower opening, whereas the lighter materials (polymers) in suspension in the solution rise up in the upward vortex and exit through the upper opening, with a possibility of fine adjustment of the density threshold.
Use is made, for example, of a hydrocyclone manufactured by the company Salter Cyclones Ltd., Cheltenham, United Kingdom, the company FLSmidth & Krebbs, Valby, Denmark, the company Neyrtec Minerai, Lorient, France, or else the company Multotec, Johannesburg, South Africa.
- 9 -Step 4: magnetic separation (optional) The densest particles resulting from the hydrocycloning, essentially consisting of metal particles in suspension in the liquid stream, are subjected to a magnetic separation in order to isolate the magnetic metals, typically the ferrous metals, from the other metals.
It is possible, for example, to carry out the process proposed commercially by the company Liquisort Recycling B.V., El Son, the Netherlands.
It will be noted here that depending on the type of electronic waste, this step is optional. In particular, ferrite-type materials may also, where appropriate, be recovered by the downstream density separation step that will now be described.
Step 5: density separation The particles essentially consisting of metals of various densities (either the nonferrous metals resulting from the magnetic separation, or ah l of the metals resulting from the preceding step when no magnetic separation is provided) are then subjected to a density separation step that aims to isolate the metals of various densities from one another. The separation means may be selected from centrifugal gravity separators, densimetric tables, and flotation-type separators or spiral concentrators. Depending on the nature of the waste, the number of metals to be separated and the type of separator, the separation means may be arranged in various ways.
Advantageously, gravity concentrators such as those of the Falcon range sold by the company Sepro, Langley, Canada or else those (Knelson concentrators) sold by the company FLSmidth & Krebbs, Valby, Denmark, or else preferentially multi-gravity drum separators sold by the company Salter Cyclones Ltd., Cheltenham, United Kingdom are used.
It is possible, for example, to carry out the process proposed commercially by the company Liquisort Recycling B.V., El Son, the Netherlands.
It will be noted here that depending on the type of electronic waste, this step is optional. In particular, ferrite-type materials may also, where appropriate, be recovered by the downstream density separation step that will now be described.
Step 5: density separation The particles essentially consisting of metals of various densities (either the nonferrous metals resulting from the magnetic separation, or ah l of the metals resulting from the preceding step when no magnetic separation is provided) are then subjected to a density separation step that aims to isolate the metals of various densities from one another. The separation means may be selected from centrifugal gravity separators, densimetric tables, and flotation-type separators or spiral concentrators. Depending on the nature of the waste, the number of metals to be separated and the type of separator, the separation means may be arranged in various ways.
Advantageously, gravity concentrators such as those of the Falcon range sold by the company Sepro, Langley, Canada or else those (Knelson concentrators) sold by the company FLSmidth & Krebbs, Valby, Denmark, or else preferentially multi-gravity drum separators sold by the company Salter Cyclones Ltd., Cheltenham, United Kingdom are used.
- 10 -Preferentially, the stream of the liquid medium transporting the particles to be separated is cascaded through a series of separation devices, each device delivering a metal having a certain density. Still depending on the type of separator, it is possible te proceed according te increasing densities or according te decreasing densities (decreasing densities with the Salter multi-gravity separators).
Optionally, each separation is repeated in order te increase the concentration and thus achieve the desired degree of purity for each metal.
Moreover, depending on the separation capacity of the machines with respect te the liquid stream te be treated, it is possible te provide, for the separation of a given metal, several machines operating in parallel or cascade.
Typically, provision is made for the adjustment of the machines for the separation of the following metals:
aluminum, copper, iron, lead, tin, gold, silver, tantalum.
But, depending on the upstream nature of the treated waste (in particular the qualities of the circuit boards), it is possible te decide te disregard some metals, or te add others.
In the case of metals of similar densities, it is additionally possible te separate them together, and provide a subsequent differentiating treatment.
It will furthermore be noted that, upstream, a hydrocycloning separation of the same type as that used for separating the plastic materials may be carried out te separate the least dense metals, and in particular aluminum.
Step 6: final packaging The various metals separated in the preceding step, still in the form of particles in a liquid carrier, are stripped of the liquid, typically by filtration and drying,
Optionally, each separation is repeated in order te increase the concentration and thus achieve the desired degree of purity for each metal.
Moreover, depending on the separation capacity of the machines with respect te the liquid stream te be treated, it is possible te provide, for the separation of a given metal, several machines operating in parallel or cascade.
Typically, provision is made for the adjustment of the machines for the separation of the following metals:
aluminum, copper, iron, lead, tin, gold, silver, tantalum.
But, depending on the upstream nature of the treated waste (in particular the qualities of the circuit boards), it is possible te decide te disregard some metals, or te add others.
In the case of metals of similar densities, it is additionally possible te separate them together, and provide a subsequent differentiating treatment.
It will furthermore be noted that, upstream, a hydrocycloning separation of the same type as that used for separating the plastic materials may be carried out te separate the least dense metals, and in particular aluminum.
Step 6: final packaging The various metals separated in the preceding step, still in the form of particles in a liquid carrier, are stripped of the liquid, typically by filtration and drying,
- 11 -then subjected to packaging treatments, such as pelletizing via compacting, for each of the metals recovered.
Where appropriate, it is possible to carry out an upstream characterization of the waste to be treated, by any known method of analysis, in order to optionally adjust the steps of the process, and in particular the parameters of the hydrocycloning and of the density separation.
It is also possible to carry out a final characterization of the metals recovered, in order to estimate their degree of purity and to identify possible secondary metals still present, and to detect possible separation problems in the process.
Naturally, the present invention is in no way limited to the preceding description, but a person skilled in the art will know how to introduce numerous variants or modifications thereto.
Where appropriate, it is possible to carry out an upstream characterization of the waste to be treated, by any known method of analysis, in order to optionally adjust the steps of the process, and in particular the parameters of the hydrocycloning and of the density separation.
It is also possible to carry out a final characterization of the metals recovered, in order to estimate their degree of purity and to identify possible secondary metals still present, and to detect possible separation problems in the process.
Naturally, the present invention is in no way limited to the preceding description, but a person skilled in the art will know how to introduce numerous variants or modifications thereto.
Claims (12)
1. A process for treating electronic waste with a view to individually recovering metals included in such waste, characterized in that it comprises the series of the following steps:
- grinding the waste under conditions suitable for individually separating the various metal constituents of the waste, - mixing the ground waste with a liquid to form a suspension, - separating, by gravity, the suspension in order to separate the particles of highest densities, containing most of the metals, from the particles of lowest densities, and - separating, by density, the suspension containing most of the metals in order to obtain suspensions containing the individually separated metals.
- grinding the waste under conditions suitable for individually separating the various metal constituents of the waste, - mixing the ground waste with a liquid to form a suspension, - separating, by gravity, the suspension in order to separate the particles of highest densities, containing most of the metals, from the particles of lowest densities, and - separating, by density, the suspension containing most of the metals in order to obtain suspensions containing the individually separated metals.
2. The process as claimed in claim 1, characterized in that the mean size of the metal particles after the grinding step is between around 10 and 100 µm, and more preferentially between 20 and 50 µm.
3. The process as claimed in either of claims 1 and 2, characterized in that the metal particles have, after grinding, a distribution value D80 between around 25 and 60 µm.
4. The process as claimed in one of claims 1 to 4, characterized in that at least one final phase of the grinding is carried out by attrition.
5. The process as claimed in one of claims 1 to 4, characterized in that the gravity separation step is carried out by hydrocycloning.
6. The process as claimed in one of claims 1 to 5, characterized in that the proportion of solids in the suspension is between around 5% and 30% by weight, preferably between around 8% and 15% by weight.
7. The process as claimed in one of claims 1 to 6, characterized in that the liquid is water, the suspension additionally containing a wetting agent.
8. The process as claimed in claim 7, characterized in that the wetting agent is nonionic.
9. The process as claimed in one of claims 1 to 7, characterized in that the density separation step is carried out by one or more separation machines selected from a group comprising centrifugal gravity separators, densimetric tables, flotation-type separators, spiral concentrators and multi-gravity drum separators.
10. The process as claimed in claim 9, characterized in that it comprises a set of separation machines connected in cascade and set to different density ranges.
11. The process as claimed in one of claims 1 to 10, characterized in that it comprises, before the density separation step, a magnetic separation step.
12. The process as claimed in one of claims 1 to 11, characterized in that it additionally comprises a final packaging step comprising an elimination of the liquid and a pelletizing of the separated metals.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR14/58646 | 2014-09-15 | ||
FR1458646A FR3025806B1 (en) | 2014-09-15 | 2014-09-15 | PROCESS FOR PROCESSING AND EXTRACTING ELECTRONIC WASTE FOR RECOVERING COMPONENTS INCLUDED IN SUCH WASTE |
PCT/IB2015/057075 WO2016042469A1 (en) | 2014-09-15 | 2015-09-15 | Method for processing and removing electronic waste with a view to recovering the components included in such waste |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2961441A1 true CA2961441A1 (en) | 2016-03-24 |
Family
ID=51790770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2961441A Pending CA2961441A1 (en) | 2014-09-15 | 2015-09-15 | Method for processing and removing electronic waste with a view to recovering the components included in such waste |
Country Status (12)
Country | Link |
---|---|
US (1) | US20170253946A1 (en) |
EP (1) | EP3194076A1 (en) |
JP (1) | JP7163026B2 (en) |
KR (1) | KR102572613B1 (en) |
CN (1) | CN107073478B (en) |
AP (1) | AP2017009808A0 (en) |
CA (1) | CA2961441A1 (en) |
FR (1) | FR3025806B1 (en) |
MA (1) | MA40646A (en) |
MX (1) | MX2017003357A (en) |
WO (1) | WO2016042469A1 (en) |
ZA (1) | ZA201702043B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018122799A1 (en) * | 2016-12-30 | 2018-07-05 | Ecoback Sp Z O.O. | Ferrite solids for a heavy liquid suspension, method of preparation thereof and use of ferrite as heavy liquid solids |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017172980A1 (en) * | 2016-03-29 | 2017-10-05 | Valerio Thomas A | Use of multi-gravity separation to recover metals from iba, asr, and electronic scrap |
CN108160305B (en) * | 2018-02-08 | 2019-10-18 | 韶关学院 | A kind of mixed metal powder separation method and atmosphere furnace used |
WO2019221591A1 (en) * | 2018-05-18 | 2019-11-21 | Jimenez Guzman Francisco Javier | System for the recovery and refining in a physical-mechanical manner of non-ferrous metals from electronic scrap |
FR3085867A1 (en) | 2018-09-17 | 2020-03-20 | Bigarren Bizi | AERAULIC SEPARATION PROCESS AND INSTALLATION |
ES2956480R1 (en) * | 2019-05-31 | 2024-03-27 | Univ Madrid Autonoma | Procedure for the separation of microplastics from aqueous matrices |
FR3101791B1 (en) * | 2019-10-15 | 2021-09-17 | Broyeurs Poittemill Ingenierie | Process and installation for the continuous aeraulic separation of particulate materials consisting of a mixture of heterogeneous particles both in particle size and density |
CN114522795B (en) * | 2022-01-26 | 2023-11-14 | 环创(厦门)科技股份有限公司 | Wet crushing and shaking separation process for waste circuit boards |
Family Cites Families (69)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL177898C (en) * | 1974-12-12 | 1985-12-16 | Stamicarbon | METHOD FOR RECOVERING USEFUL MATERIALS FROM WASTE MATERIAL CONTAINING METALS AND NON-METALS |
NL181262C (en) * | 1976-05-14 | 1987-07-16 | Stamicarbon | METHOD FOR RECOVERING USEFUL MATERIALS FROM HOUSLETS, CONTAINING METALS AND NON-METALS |
US4252280A (en) * | 1979-07-20 | 1981-02-24 | Richard Rymer | Attrition mill |
US4512879A (en) * | 1983-07-20 | 1985-04-23 | Battelle Development Corp. | Process for producing a metalliferous concentrate from a particulate feed material |
DE3410961A1 (en) * | 1984-03-24 | 1985-10-03 | Amberger Kaolinwerke Gmbh, 8452 Hirschau | METHOD FOR SEPARATING METALLIC COMPONENTS FROM NON-METAL COMPONENTS OF A CORRESPONDING BLOCK, AND RELATED ARRANGEMENT |
DE3512965A1 (en) * | 1985-04-11 | 1986-10-16 | ALUPLAST Aluminium - Plastik Recycling GmbH, 5440 Mayen | Method and device for processing comminuted waste material containing heavy components |
CA2073951C (en) * | 1991-08-02 | 1996-12-03 | Jiann-Yang Hwang | Separation of normally hydrophobic plastic materials by froth flotation |
JP2520213B2 (en) * | 1992-09-25 | 1996-07-31 | 九州メタル産業株式会社 | How to sort various metals of metal waste by type |
US5341935A (en) * | 1993-04-29 | 1994-08-30 | Evergreen Global Resources, Inc. | Method of separating resource materials from solid waste |
US5984213A (en) * | 1994-04-11 | 1999-11-16 | Mount Isa Mines Limited | Attrition mill |
BR9507351A (en) * | 1994-04-11 | 1997-09-23 | Mount Isa Mines | Grinding mill |
WO1997020643A2 (en) * | 1995-12-01 | 1997-06-12 | Eastern Power Limited | Apparatus and method for waste recycling and conversion |
US5829694A (en) * | 1996-01-04 | 1998-11-03 | Resource Concepts, Inc. | Apparatus and systems that separate and isolate precious and semi-precious metals from electronic circuit boards |
US7172143B2 (en) * | 1996-07-22 | 2007-02-06 | Antoine Vandeputte | Method and plant for separating polymeric materials |
DE19644437A1 (en) * | 1996-10-25 | 1998-04-30 | Der Gruene Punkt Duales Syst | Process for the digestion of waste containing at least partially recyclable parts |
JP3082736B2 (en) * | 1998-02-18 | 2000-08-28 | 日本電気株式会社 | Waste recycling method and apparatus |
JP2001064735A (en) * | 1999-08-25 | 2001-03-13 | Zipangu:Kk | Method and system for recovering gold or the like from portable telephone |
JP2001096261A (en) * | 1999-10-01 | 2001-04-10 | Matsushita Electric Ind Co Ltd | Method of recycling waste electric appliance resource |
US20010037035A1 (en) * | 2000-05-24 | 2001-11-01 | Kevin Kutcel | Method for preparing polyborate compounds and uses for same |
US6974097B2 (en) * | 2000-06-01 | 2005-12-13 | Simon Jonathan L | Method and apparatus for sorting recyclable products |
DE10053488A1 (en) * | 2000-10-27 | 2002-05-08 | Volkswagen Ag | Processing shredder residues of metal-containing waste comprises producing raw granulate fraction by separating ferromagnetic fraction, non-ferrous metal-containing fraction, granulate fraction and sand fraction |
DE10053487A1 (en) * | 2000-10-27 | 2002-05-08 | Volkswagen Ag | Method for processing shredder residues of metal-containing waste comprises separating the shredder residue into a shredder light fraction and a non-ferromagnetic fraction |
GB2377900B (en) * | 2002-05-03 | 2003-06-18 | John Alan Porter | Treatment of municipal solid waste |
US6962255B2 (en) * | 2003-05-13 | 2005-11-08 | Steven Tse | Apparatus and method of separating medium-sized materials from garbage for collection |
EP1740325A1 (en) * | 2004-04-08 | 2007-01-10 | Newearth PTE LTD | Method for waste stabilisation and products obtained therefrom |
ITMI20040803A1 (en) * | 2004-04-23 | 2004-07-23 | Sist Ecodeco S P A | METHOD FOR THE PRODUCTION OF NATURAL ENERGY FROM WASTE |
JPWO2007015392A1 (en) * | 2005-08-04 | 2009-02-19 | シャープ株式会社 | Method and apparatus for recovering indium from waste liquid crystal display |
BRPI0617765A2 (en) * | 2005-10-24 | 2011-08-02 | Thomas A Valerio | apparatus, system and process for classifying dissimilar materials |
JP5090349B2 (en) * | 2006-08-04 | 2012-12-05 | パナソニック株式会社 | Bonding material, bonding part and circuit board |
US8585903B2 (en) * | 2007-02-14 | 2013-11-19 | Winner Water Services, Inc. | Water purification |
US8034150B2 (en) * | 2007-10-12 | 2011-10-11 | Metal Conversion Technologies, Llc | Process and system for material reclamation and recycling |
US8118906B2 (en) * | 2007-10-29 | 2012-02-21 | Heraeus Inc. | Methodology for recycling Ru and Ru-alloy deposition targets and targets made of recycled Ru and Ru-based alloy powders |
KR100889315B1 (en) * | 2007-11-16 | 2009-03-18 | 한국지질자원연구원 | Novel pre-treatment process for liberation of metals from waste printed circuit boards using organic solution |
US20100275730A1 (en) * | 2008-01-07 | 2010-11-04 | Atomic Energy Council - Institute Of Nuclear Energy Research | Method for recycling precious metal from used printed circuit boards |
DE102009009873A1 (en) * | 2008-03-31 | 2009-10-01 | Volkswagen Ag | Process and plant for processing a heavy, plastic-rich fraction |
KR100926801B1 (en) * | 2008-04-04 | 2009-11-12 | 주식회사 동방이엠티 | Separate sorter for metal collection from PCB |
US7786401B2 (en) * | 2008-06-11 | 2010-08-31 | Valerio Thomas A | Method and system for recovering metal from processed recycled materials |
JPWO2010016513A1 (en) * | 2008-08-08 | 2012-01-26 | 太平洋セメント株式会社 | Combustible waste fueling apparatus and fueling method |
FR2938457B1 (en) * | 2008-11-14 | 2011-01-07 | Terra Nova | PROCESS FOR RECOVERING METALS CONTAINED IN ELECTRONIC WASTE |
JP2010119906A (en) * | 2008-11-17 | 2010-06-03 | National Institute For Materials Science | Crushed mass of electronic equipment |
CN101406861B (en) * | 2008-11-20 | 2010-06-02 | 上海交通大学 | Multiple-roller type high-pressure electrostatic separation method for recovering waste and old printed circuit boards |
GB0905324D0 (en) * | 2009-03-27 | 2009-05-13 | Univ Birmingham | Metal recovery |
WO2010127036A1 (en) * | 2009-04-28 | 2010-11-04 | Mtd America Ltd (Llc) | Apparatus and method for separating materials using air |
CA2769755A1 (en) * | 2009-07-31 | 2011-02-03 | Thomas A. Valerio | Method and system for separating and recovering wire and other metal from processed recycled materials |
US8757523B2 (en) * | 2009-07-31 | 2014-06-24 | Thomas Valerio | Method and system for separating and recovering wire and other metal from processed recycled materials |
US7731840B1 (en) * | 2009-09-18 | 2010-06-08 | Green Intellectual Properties, Llc | Apparatus for removing hydrocarbons and contaminates |
US9358614B2 (en) * | 2010-03-31 | 2016-06-07 | Hitachi Metals, Ltd. | Slurry recycling method, producing method of rare earth sintered magnet and slurry recycling apparatus |
LU91730B1 (en) * | 2010-09-13 | 2012-03-14 | Wurth Paul Sa | Dry granulation of metallurgical slag |
US8540798B2 (en) * | 2011-01-04 | 2013-09-24 | Guilherme Santana Lopes Gomes | Systems and methods for recycling steelmaking converter sludge |
CN102240606B (en) * | 2011-05-05 | 2013-06-19 | 广州有色金属研究院 | Method for separating nonmetal materials from waste circuit boards by flotation |
PL2714861T3 (en) * | 2011-06-03 | 2017-10-31 | Accordant Energy Llc | Method for producing engineered fuel feed stocks from waste material |
FI123432B (en) * | 2011-12-02 | 2013-04-30 | Jyvaeskylaen En Oy | Method for treating ash, in particular fly ash |
MX342715B (en) * | 2012-10-31 | 2016-09-08 | Centro De Investigación En Química Aplicada | Physical process for the recovery of iron from magnetic cementitious spherical particles generated from metallurgical byproducts. |
US9016477B2 (en) * | 2012-03-19 | 2015-04-28 | Mid-American Gunite, Inc. | Method and system for processing slag material |
BR102012008340B8 (en) * | 2012-03-19 | 2022-12-13 | Steel Participacoes E Investimentos S A | PROCESS AND SYSTEM FOR DRY RECOVERY OF IRON OXIDE ORE FINES AND SUPER FINE |
CN102671928B (en) * | 2012-05-07 | 2014-02-26 | 四川川润环保能源科技有限公司 | Method for sorting and comprehensively using urban mixed garbage |
CN102671916B (en) * | 2012-05-21 | 2014-05-28 | 宁波天地回珑再生资源科技有限公司 | Recycling processing technology for waste circuit board |
US20150083832A1 (en) * | 2013-09-20 | 2015-03-26 | Vhip Llc | Method and system for recovering copper from automobile shredder residue |
CN105531043B (en) * | 2013-09-30 | 2017-07-04 | 日立金属株式会社 | The manufacture method of secondary alloy material and the manufacture method of regeneration amorphous alloy strip |
US20150136662A1 (en) * | 2013-10-09 | 2015-05-21 | Thomas Valerio | Method and system for recovering recyclable materials from an asr landfill |
WO2015054499A1 (en) * | 2013-10-09 | 2015-04-16 | Thomas Valerio | Method and system for separating aluminum and magnesium from asr zorba |
US20150136661A1 (en) * | 2013-10-25 | 2015-05-21 | Thomas Valerio | Method and system for processing low grade shredder residue fines |
AU2015263983A1 (en) * | 2014-05-22 | 2016-12-22 | Tav Holdings, Inc. | System and method for recovering metals from a waste stream |
AU2015367203A1 (en) * | 2014-12-19 | 2017-06-01 | Hatch Ltd. | Methods and apparatus for metal recovery from slag |
MX2017013512A (en) * | 2015-04-22 | 2018-04-24 | Anglo American Services Uk Ltd | Process for recovering value metals from ore. |
DE102015112254A1 (en) * | 2015-07-28 | 2017-02-02 | Bta International Gmbh | Hydrodynamic heavy material separation of a slurry |
EP3133175A1 (en) * | 2015-08-19 | 2017-02-22 | Enthone, Inc. | System and process for recovering catalytic precious metal from aqueous galvanic processing solution |
DE102015122818A1 (en) * | 2015-12-23 | 2017-06-29 | Hydro Aluminium Rolled Products Gmbh | Method and device for the recycling of metal scrap |
US11260437B2 (en) * | 2016-11-22 | 2022-03-01 | Brian Michael Hays | Cleaning and separating medical waste |
-
2014
- 2014-09-15 FR FR1458646A patent/FR3025806B1/en active Active
-
2015
- 2015-09-15 CN CN201580060638.7A patent/CN107073478B/en active Active
- 2015-09-15 EP EP15787012.2A patent/EP3194076A1/en active Pending
- 2015-09-15 MX MX2017003357A patent/MX2017003357A/en unknown
- 2015-09-15 MA MA040646A patent/MA40646A/en unknown
- 2015-09-15 US US15/511,073 patent/US20170253946A1/en not_active Abandoned
- 2015-09-15 CA CA2961441A patent/CA2961441A1/en active Pending
- 2015-09-15 WO PCT/IB2015/057075 patent/WO2016042469A1/en active Application Filing
- 2015-09-15 AP AP2017009808A patent/AP2017009808A0/en unknown
- 2015-09-15 JP JP2017534019A patent/JP7163026B2/en active Active
- 2015-09-15 KR KR1020177008825A patent/KR102572613B1/en active IP Right Grant
-
2017
- 2017-03-23 ZA ZA2017/02043A patent/ZA201702043B/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018122799A1 (en) * | 2016-12-30 | 2018-07-05 | Ecoback Sp Z O.O. | Ferrite solids for a heavy liquid suspension, method of preparation thereof and use of ferrite as heavy liquid solids |
AU2017385101B2 (en) * | 2016-12-30 | 2022-07-21 | Akademia Gorniczo-Hutnicza Im. Stanislawa Staszica | Ferrite solids for a heavy liquid suspension, method of preparation thereof and use of ferrite as heavy liquid solids |
Also Published As
Publication number | Publication date |
---|---|
JP2017527442A (en) | 2017-09-21 |
US20170253946A1 (en) | 2017-09-07 |
WO2016042469A1 (en) | 2016-03-24 |
EP3194076A1 (en) | 2017-07-26 |
ZA201702043B (en) | 2019-06-26 |
CN107073478A (en) | 2017-08-18 |
KR20170056577A (en) | 2017-05-23 |
KR102572613B1 (en) | 2023-08-30 |
JP7163026B2 (en) | 2022-10-31 |
CN107073478B (en) | 2021-10-08 |
FR3025806B1 (en) | 2019-09-06 |
MX2017003357A (en) | 2017-11-22 |
MA40646A (en) | 2016-03-24 |
FR3025806A1 (en) | 2016-03-18 |
AP2017009808A0 (en) | 2017-03-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20170253946A1 (en) | Method for processing and removing electronic waste with a view to recovering the components included in such waste | |
US11071987B2 (en) | System and method for recovery of valuable constituents from steel-making slag fines | |
EP3145635B1 (en) | System and method for recovering metals from a waste stream | |
EP3325167B1 (en) | System and method for recovering desired materials from fines in incinerator ash | |
KR102442312B1 (en) | How to deal with scraps of electronic and electrical equipment parts | |
CN107532235B (en) | Ore slurry pre-treating method, ore slurry manufacturing method | |
JP2002355661A (en) | Method for recovering metal from electronic or electric part with resin | |
JP4478637B2 (en) | Copper converter dust treatment method | |
OA18237A (en) | Process for the treatment and extraction of electronic waste with a view to recovering the constituents included in such waste. | |
CN110404664A (en) | A kind of method that low-grade tin-iron mine throws tail in advance | |
CN111886350B (en) | Method for treating electronic and electrical equipment part scraps | |
EP3436200B1 (en) | Method and system for producing aggregate | |
KR100523845B1 (en) | Recovery method of Tantalum anode from Waste Tantalum Capacitor | |
JP7123600B2 (en) | Processing method of electronic and electrical equipment parts waste | |
JP6791726B2 (en) | Processing method | |
JP5987769B2 (en) | Copper smelting dust treatment method and copper smelting operation method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request |
Effective date: 20200908 |
|
EEER | Examination request |
Effective date: 20200908 |
|
EEER | Examination request |
Effective date: 20200908 |
|
EEER | Examination request |
Effective date: 20200908 |
|
EEER | Examination request |
Effective date: 20200908 |
|
EEER | Examination request |
Effective date: 20200908 |
|
EEER | Examination request |
Effective date: 20200908 |
|
EEER | Examination request |
Effective date: 20200908 |