CN116200605A - Production method for efficiently removing impurities from copper enameled wire after paint removal - Google Patents
Production method for efficiently removing impurities from copper enameled wire after paint removal Download PDFInfo
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- CN116200605A CN116200605A CN202310011472.6A CN202310011472A CN116200605A CN 116200605 A CN116200605 A CN 116200605A CN 202310011472 A CN202310011472 A CN 202310011472A CN 116200605 A CN116200605 A CN 116200605A
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- Prior art keywords
- copper
- enameled wire
- copper enameled
- impurities
- production method
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 63
- 239000010949 copper Substances 0.000 title claims abstract description 63
- 239000012535 impurity Substances 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000003973 paint Substances 0.000 title claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000005484 gravity Effects 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000001556 precipitation Methods 0.000 claims abstract description 7
- 238000005119 centrifugation Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 12
- 229910018072 Al 2 O 3 Inorganic materials 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 239000000523 sample Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000002386 leaching Methods 0.000 description 4
- 229910000765 intermetallic Inorganic materials 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009854 hydrometallurgy Methods 0.000 description 2
- 238000010297 mechanical methods and process Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 238000009853 pyrometallurgy Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000013048 microbiological method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009856 non-ferrous metallurgy Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B15/00—Apparatus or processes for salvaging material from cables
- H01B15/003—Apparatus or processes for salvaging material from cables by heating up
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0056—Scrap treating
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/006—Pyrometallurgy working up of molten copper, e.g. refining
-
- 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
- C22B7/001—Dry processes
- C22B7/004—Dry processes separating two or more metals by melting out (liquation), i.e. heating above the temperature of the lower melting metal component(s); by fractional crystallisation (controlled freezing)
-
- 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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/02—Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B15/00—Apparatus or processes for salvaging material from cables
- H01B15/001—Apparatus or processes for salvaging material from cables by cooling down
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a production method for efficiently removing impurities from a copper enameled wire after paint removal. The copper enameled wire contains nonmetallic impurities and metallic impurities. Based on the difference of melting point, density and precipitation temperature of impurities in the copper enameled wire, the impurity elements in the copper enameled wire are purified and removed by adopting a hypergravity liquation separation technology, so that the aim of improving the purity of metallic copper is fulfilled. According to the invention, fe, pb, sn, siO in the copper enameled wire is prepared by controlling conditions such as heating temperature (T=900-1250 ℃), gravity coefficient (G=50-1000), centrifugation time (t=1-20 min), cooling rate (V=1-15 ℃/min) and the like 2 、Al 2 O 3 Impurities such as CuO are removed separately. The method fully utilizes impurities in the copper enameled wireThe physical and chemical properties of the material realize the rapid and efficient separation of different impurity elements, and the process is simple, the cost is low, and the efficient and clean production method is provided for the field of purifying and impurity removing of waste copper enameled wires.
Description
Technical Field
The invention relates to a metal recycling technology in waste copper enameled wires, in particular to a production method for efficiently removing impurities from the copper enameled wires after paint removal by using a supergravity technology, and belongs to the technical field of nonferrous metallurgy.
Background
Copper metal has excellent heat conductivity, electric conductivity and corrosion resistance, and is an unprecedented strategic resource. About 50% of copper is processed into enameled wire each year for applications in the fields of electronic components, aerospace, communication cables, etc. With the high-speed development of the power industry and the information communication technology, the updating and using period of electric appliances and motors are shorter and shorter, so that a large number of electric products are discarded and piled up, and a large number of waste copper enameled wires are generated. The copper enameled wire contains a large amount of copper, has huge recovery value, and can relieve the current situation of shortage of copper mine resources in China.
At present, the recovery method of copper in the copper enameled wire mainly comprises a mechanical method, a microbiological method, hydrometallurgy and pyrometallurgy. The mechanical method has the outstanding advantage of environmental friendliness, and can remove the plastic layer and the paint layer on the surface of the copper enameled wire, but is difficult to treat impurities in the copper wire. The biotechnology method is still under study, and the leaching time is long, the proper strain is difficult to find, and the leaching rate is low. The development of hydrometallurgy technology is relatively mature, high-purity cathode copper can be recovered and produced through a process combining acid leaching and electrolysis, but the process flow is longer, and the produced leaching liquid, electrolyte, residues and the like have toxicity, so that secondary pollution is easily caused due to improper treatment. The pyrometallurgical technology comprises slag making refining, oxygen blowing smelting and the like, has higher metal recovery rate and wider application, has realized industrial application in large-scale smelting plants, but has the problems that the energy consumption is large, the treatment equipment is expensive, nonmetallic impurities (such as slag making flux, oxygen element and the like) are easy to introduce, and the purity of copper is not high. Aiming at the defects of various processes, a new method with high efficiency, cleanness and high purity of recovered copper is necessary to be researched. The supergravity technology is widely applied to strengthening phase separation and strengthening mass transfer as a physical method, and can centrifugally enrich molten metal according to the density and melting point difference between target recovered metal copper and impurities in copper enameled wires, so as to realize the purposes of efficiently removing impurities and recovering high-purity copper.
Disclosure of Invention
The invention aims to provide a production method for efficiently removing impurities from a copper enameled wire after paint removal by utilizing a supergravity technology, wherein impurity elements are enriched and separated from the copper enameled wire by utilizing the difference of the melting point and the density of the impurities in the copper enameled wire and adopting a supergravity liquation separation technology, impurity components with high density are enriched at the bottom of copper and impurity components with low density are enriched at the top of copper by controlling liquation crystallization temperature and cooling rate, so that the purposes of purifying and removing impurities and improving the purity of copper are achieved, and the high-efficiency recycling of waste resources is realized.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the production method for efficiently removing impurities from the copper enameled wire after paint removal comprises the following steps:
1) Placing the copper enamelled wire material subjected to paint removal in a hypergravity liquation separation device, adding carbon powder for covering, heating to raise the temperature, maintaining the temperature for a certain time, controlling the centrifugal gravity coefficient of a sample at the temperature, and centrifugally enriching and separating nonmetallic impurities and iron;
2) And cooling the centrifugally enriched and separated sample to liquation temperature, keeping the centrifugal gravity coefficient unchanged, controlling the cooling rate, and sequentially separating out impurity tin and lead.
In the invention, the hypergravity liquation separation device can adopt a centrifugal machine with a heating device arranged on the rotary tank, and sample materials are added into the rotary tank to carry out hypergravity liquation separation.
In the invention, carbon powder is added in the step 1) to cover and provide a reducing atmosphere, so that the oxidation of copper at high temperature is avoided.
Preferably, the heating temperature in step 1) is 1050-1250 ℃, the heat preservation time is 1-20 min, and the centrifugation time is 1-20 min.
Preferably, the centrifugal gravity coefficient in steps 1) and 2) is 50 to 1000.
Preferably, the liquation temperature in the centrifugal cooling solidification process in the step 2) is 900-1100 ℃, the precipitation time is 1-10 min, and the cooling rate is 1-15 ℃/min.
The copper enameled wire contains nonmetallic impurities and metallic impurities. Based on the difference of melting point, density and precipitation temperature of impurities in the copper enameled wire, the impurity elements in the copper enameled wire are purified and removed by adopting a hypergravity liquation separation technology, so that the aim of improving the purity of metallic copper is fulfilled. According to the invention, fe, pb, sn, siO in the copper enameled wire is prepared by controlling conditions such as heating temperature (T=900-1250 ℃), gravity coefficient (G=50-1000), centrifugation time (t=1-20 min), cooling rate (V=1-15 ℃/min) and the like 2 、Al 2 O 3 Impurities such as CuO are removed separately. The method fully utilizes the physical and chemical properties of impurities in the copper enameled wire, realizes the rapid and efficient separation of different impurity elements, has simple process and low cost, and provides a high-efficiency and clean production method for the field of purifying and impurity removing of the waste copper enameled wire.
The beneficial effects of the invention are as follows:
the method organically combines the physical method supergravity technology with the pyrometallurgy technology, can realize the efficient purification and removal of impurities in the copper enameled wire and improve the purity of copper, and has the advantages of short flow, simple process, clean and efficient process and the like.
Detailed Description
The following describes the technical scheme of the present invention in detail with reference to examples.
Example 1
Placing the copper enameled wire after paint removal in a rotary tank in a centrifuge, adding carbon powder for covering, keeping the temperature at 1200 ℃, keeping the temperature for 20min, starting the centrifuge, adjusting the rotation speed of the centrifuge to enable the gravity coefficient to reach 800, and centrifuging and enriching for 10min; then cooling to 1100 ℃ at a cooling rate of 10 ℃/min, keeping the gravity coefficient unchanged, and controlling the precipitation time to be 5min. Centrifugal separation to obtainThe copper is vertically and longitudinally sectioned along the hypergravity direction, and the detection and characterization are carried out by scanning electron microscope/energy spectrum, electronic probe and other instruments, and the result shows that the bottom of the copper is enriched with lead impurities, the tin is separated in the form of intermetallic compounds, and the top is enriched with iron and nonmetallic inclusion (SiO) 2 、Al 2 O 3 CuO), and the like, and the other regions are copper simple substances.
Example 2
Placing the copper enameled wire after paint removal in a rotary tank in a centrifuge, adding carbon powder for covering, heating to 1250 ℃, preserving heat for 20min, starting the centrifuge, adjusting the rotation speed of the centrifuge to enable the gravity coefficient to reach 600, and centrifuging and enriching for 5min; then cooling to 1000 ℃ at a cooling rate of 5 ℃/min, keeping the gravity coefficient unchanged, and controlling the precipitation time to be 10min. The copper obtained by centrifugal separation is vertically and longitudinally sectioned along the hypergravity direction, and is detected and characterized by scanning electron microscope/energy spectrum, electron probe and other instruments, and the result shows that the bottom of copper is enriched with lead impurities, tin is separated in the form of intermetallic compound, and the top is enriched with iron and nonmetallic inclusion (SiO) 2 、Al 2 O 3 CuO), and the like, and the other regions are copper simple substances.
Example 3
Placing the copper enameled wire after paint removal in a rotary tank in a centrifuge, adding carbon powder for covering, heating to 1150 ℃, preserving heat for 20min, starting the centrifuge, adjusting the rotation speed of the centrifuge to enable the gravity coefficient to reach 1000, and centrifuging and enriching for 5min; then cooling to 950 ℃ at a cooling rate of 2 ℃/min, keeping the gravity coefficient unchanged, and controlling the precipitation time to be 5min. The copper obtained by centrifugal separation is vertically and longitudinally sectioned along the hypergravity direction, and is detected and characterized by scanning electron microscope/energy spectrum, electron probe and other instruments, and the result shows that the bottom of copper is enriched with lead impurities, tin is separated in the form of intermetallic compound, and the top is enriched with iron and nonmetallic inclusion (SiO) 2 、Al 2 O 3 CuO), and the like, and the other regions are copper simple substances.
The method can be realized by the upper and lower limit values of the interval and the interval value of the process parameters (such as temperature, time and the like), and the examples are not necessarily listed here.
The invention may be practiced without these specific details, using any knowledge known in the art.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and are not limiting. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the appended claims.
Claims (5)
1. The production method for efficiently removing impurities from the copper enameled wire after paint removal comprises the following steps:
1) Placing the copper enamelled wire material subjected to paint removal in a hypergravity liquation separation device, adding carbon powder for covering, heating to raise the temperature, maintaining the temperature for a certain time, controlling the centrifugal gravity coefficient of a sample at the temperature, and centrifugally enriching and separating nonmetallic impurities and iron;
2) And cooling the centrifugally enriched and separated sample to liquation temperature, keeping the centrifugal gravity coefficient unchanged, controlling the cooling rate, and sequentially separating out impurity tin and lead.
2. The production method for efficiently removing impurities from the depainted copper enameled wire, which is disclosed in claim 1, is characterized by comprising the following steps: in the step 1), carbon powder is added to cover and provide a reducing atmosphere, so that copper oxidation at high temperature is avoided.
3. The production method for efficiently removing impurities from the depainted copper enameled wire, which is disclosed in claim 1, is characterized by comprising the following steps: the heating temperature in the step 1) is 1050-1250 ℃, the heat preservation time is 1-20 min, and the centrifugation time is 1-20 min.
4. The production method for efficiently removing impurities from the depainted copper enameled wire, which is disclosed in claim 1, is characterized by comprising the following steps: the centrifugal gravity coefficient in the steps 1) and 2) is 50-1000.
5. The production method for efficiently removing impurities from the depainted copper enameled wire, which is disclosed in claim 1, is characterized by comprising the following steps: step 2) the liquation temperature is 900-1100 ℃ in the centrifugal cooling solidification process, the precipitation time is 1-10 min, and the cooling rate is 1-15 ℃/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310011472.6A CN116200605A (en) | 2023-01-05 | 2023-01-05 | Production method for efficiently removing impurities from copper enameled wire after paint removal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310011472.6A CN116200605A (en) | 2023-01-05 | 2023-01-05 | Production method for efficiently removing impurities from copper enameled wire after paint removal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116200605A true CN116200605A (en) | 2023-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310011472.6A Pending CN116200605A (en) | 2023-01-05 | 2023-01-05 | Production method for efficiently removing impurities from copper enameled wire after paint removal |
Country Status (1)
| Country | Link |
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| CN (1) | CN116200605A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090272265A1 (en) * | 2006-04-04 | 2009-11-05 | National University Corporation Kumamoto University | Method for Separating and Enriching Isotope Material, Multistage Rotor, and Apparatus for Separating and Enriching Isotope Material |
| WO2010093283A2 (en) * | 2009-02-16 | 2010-08-19 | Anisimov Oleg Vladimirovich | Method for producing a commercially pure metal and a monocrystal therefrom |
| CN105821218A (en) * | 2016-05-10 | 2016-08-03 | 北京科技大学 | Method of removing impurity element copper in crude lead through supergravity |
| CN106702164A (en) * | 2017-01-05 | 2017-05-24 | 北京科技大学 | Method and device of recovering valuable metals in steps from waste electronic circuit board particles |
| CN108165756A (en) * | 2018-01-10 | 2018-06-15 | 北京科技大学 | The method and device of metallic copper in a kind of hypergravity low temperature quick separating copper ashes |
| CN111172393A (en) * | 2019-09-02 | 2020-05-19 | 昆明理工大学 | Method for separating Al-Sn-Cu ternary alloy by virtue of supergravity |
-
2023
- 2023-01-05 CN CN202310011472.6A patent/CN116200605A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090272265A1 (en) * | 2006-04-04 | 2009-11-05 | National University Corporation Kumamoto University | Method for Separating and Enriching Isotope Material, Multistage Rotor, and Apparatus for Separating and Enriching Isotope Material |
| WO2010093283A2 (en) * | 2009-02-16 | 2010-08-19 | Anisimov Oleg Vladimirovich | Method for producing a commercially pure metal and a monocrystal therefrom |
| CN105821218A (en) * | 2016-05-10 | 2016-08-03 | 北京科技大学 | Method of removing impurity element copper in crude lead through supergravity |
| CN106702164A (en) * | 2017-01-05 | 2017-05-24 | 北京科技大学 | Method and device of recovering valuable metals in steps from waste electronic circuit board particles |
| CN108165756A (en) * | 2018-01-10 | 2018-06-15 | 北京科技大学 | The method and device of metallic copper in a kind of hypergravity low temperature quick separating copper ashes |
| CN111172393A (en) * | 2019-09-02 | 2020-05-19 | 昆明理工大学 | Method for separating Al-Sn-Cu ternary alloy by virtue of supergravity |
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Application publication date: 20230602 |