CN108746645B - Resource recovery method - Google Patents
Resource recovery method Download PDFInfo
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- CN108746645B CN108746645B CN201810717411.0A CN201810717411A CN108746645B CN 108746645 B CN108746645 B CN 108746645B CN 201810717411 A CN201810717411 A CN 201810717411A CN 108746645 B CN108746645 B CN 108746645B
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- tin
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- copper
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000011084 recovery Methods 0.000 title claims abstract description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 111
- 229910052802 copper Inorganic materials 0.000 claims abstract description 107
- 239000010949 copper Substances 0.000 claims abstract description 107
- 241000209094 Oryza Species 0.000 claims abstract description 86
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 86
- 235000009566 rice Nutrition 0.000 claims abstract description 86
- 239000002699 waste material Substances 0.000 claims abstract description 74
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000003756 stirring Methods 0.000 claims abstract description 36
- 239000000919 ceramic Substances 0.000 claims abstract description 20
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000011812 mixed powder Substances 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 13
- 238000000227 grinding Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000007790 scraping Methods 0.000 claims abstract description 5
- 238000012216 screening Methods 0.000 claims abstract description 5
- 238000004064 recycling Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 5
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 235000013339 cereals Nutrition 0.000 abstract 1
- 238000002386 leaching Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910052573 porcelain Inorganic materials 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B25/00—Obtaining tin
- C22B25/06—Obtaining tin from scrap, especially tin scrap
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0002—Preliminary treatment
- C22B15/0004—Preliminary treatment without modification of the copper constituent
- C22B15/0006—Preliminary treatment without modification of the copper constituent by dry processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- 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
- 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)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
-
- 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
- Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]
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)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a resource recovery method of waste tinned copper rice, which comprises the steps of firstly, mixing the waste tinned copper rice and ground ceramic balls according to a certain proportion to obtain a mixture; then placing the mixture in a vacuum container for heating and stirring, stripping the molten tin on the surface of the waste tin-plated copper rice through the stirring friction action of the grinding ceramic balls and the waste tin-plated copper rice and the friction action of the waste tin-plated copper rice, and realizing the separation of the tin and the copper rice; stopping heating the vacuum container, continuing stirring, scraping tin from the surface of the waste tin-plated copper rice, cooling the tin-plated copper rice into powder under the action of friction, and forming a small amount of copper into powder under the action of friction to obtain copper-tin mixed powder; then separating and grinding the ceramic balls, the waste tin-plated copper grains and the copper-tin mixed powder respectively by electric separation and screening. The invention utilizes the physical characteristic of low melting point of tin, adopts a pure physical separation method, and is separated by stirring in a vacuum state, and the method has the advantages of simple process, good effect, low cost and no secondary pollution.
Description
The application is a divisional application of a patent with the application number of 2017100035818 and the application date of 2017, 01-04.A method for recycling resources of waste tin-plated copper rice is invented and created.
Technical Field
The invention belongs to the field of secondary resource recycling, and particularly relates to a resource recycling method of waste tinned copper rice.
Background
With the rapid development of electric power communication industry, the demand of society on electric wires and cables is increasing day by day, the waste electric wires and cables are increasing day by day, and the recovery of the waste electric wires and cables has important significance to the economy and the society due to the increasing shortage of metal resources and the high price of international copper and tin. Because the traditional conductor copper wire is partially oxidized during high-temperature extrusion molding and is easy to have poor contact during wire connection, the existing copper wire is generally plated with tin on the surface so as to have good corrosion resistance and welding performance.
The tin-plated copper rice is a new industrial raw material for waste cable production, and the use of the tin-plated copper rice exceeds the use amount of fine copper. The tin-plated copper rice is separated and recycled, so that the utilization rate of metal can be improved, and the pollution to the environment is avoided.
For most waste tinned copper wires, the waste tinned copper wires are generally treated by adopting a crushing technology because the waste tinned copper wires are difficult to strip or have low stripping efficiency. The crushing technology is that waste electric wires and cables are directly crushed into particles by mechanical equipment such as a cutting machine, a crusher and the like, and then plastics and metals are separated by sorting equipment. It can be seen that the existing recovery technology of the waste electric wire and cable focuses on separating copper and plastic, but has no effect on separating and recovering the tin coating on the copper conductor. Thereby generating a large amount of waste tin-plated copper wire, namely a section of copper wire generated by cutting, and the tin plating on the surface is not separated. From the prior art, the recovery method of tin-plated copper rice mainly includes an acid leaching method and an electrolytic method, for example, chinese patent 200910090636.9 proposes a copper sulfate-heap leaching process to recover copper and tin in waste tin-plated copper wires, chinese patent 201010279564.5 adopts a special leaching device to treat and then electrolyze, and the like, and the recovery of tin from copper rice by these methods has the problems of high recovery cost, long process flow and the like.
Therefore, a more efficient, low-cost and economical and friendly method needs to be developed to solve the problem of separating and recycling the tin-plated waste copper material.
Disclosure of Invention
The invention aims to solve the technical problem of providing a resource recovery method of waste tin-plated copper rice, which has the advantages of simple method, no pollution, low cost and high recovery rate.
The invention relates to a resource recovery method of waste tinned copper rice, which is realized by the following steps:
1) mixing the waste tin-plated copper rice and the ground ceramic balls according to a certain proportion to obtain a mixture;
2) placing the mixture obtained in the step 1) in a vacuum container, heating the vacuum container by an external heating device, controlling the temperature at 250-300 ℃, stirring the mixture in the vacuum container by a stirring device for 50-60min, and stripping the molten tin on the surface of the waste tin-plated copper rice by the stirring friction action of the grinding ceramic balls and the waste tin-plated copper rice and the friction action of the waste tin-plated copper rice to realize the separation of the tin and the copper rice;
3) stopping heating the vacuum container, continuing stirring until the temperature in the vacuum container is reduced to 200 ℃, stopping stirring, scraping tin from the surface of the waste tin-plated copper rice, cooling the tin-plated copper rice into powder under the action of friction, and forming a small amount of copper into powder under the action of friction to obtain copper-tin mixed powder;
4) cooling the vacuum container to room temperature, turning off the vacuum pump, taking out materials in the vacuum container, and separating and recycling ground porcelain balls through electric separation to obtain waste tinned copper rice and copper-tin mixed powder;
5) and separating the waste tin-plated copper rice and copper-tin mixed powder through a screening device to obtain the detinned copper rice and copper-tin mixed powder.
The invention relates to a resource recovery method of waste tinned copper rice, wherein the mass ratio of the waste tinned copper rice to ground ceramic balls is 10: 1.
The invention relates to a resource recovery method of waste tin-plated copper rice, in the step 1), the wire diameter of the waste tin-plated copper rice is 2-4mm, and the length is 5-12 mm; the grinding ceramic ball is a wear-resistant alumina ceramic ball with the diameter of 5 mm.
The invention relates to a resource recovery method of waste tin-plated copper rice, wherein in the step 2) and the step 3), the system pressure of a vacuum container is not higher than 25 kpa.
The invention relates to a resource recovery method of waste tin-plated copper rice, wherein in the step 2) and the step 3), the stirring speed of a stirring device is 300-600 rpm.
The invention relates to a resource recovery method device of waste tinned copper rice, which comprises a motor, a rotating shaft and a vacuum container, wherein one end of the rotating shaft is provided with a stirring paddle and extends into a cavity of the vacuum container, and the other end of the rotating shaft is connected with a main shaft of the motor; a movable sealing sleeve sleeved on the rotating shaft is arranged on the rotating shaft between the vacuum container and the motor, and an air outlet is formed above the vacuum container.
The resource recovery method of the waste tin-plated copper rice adopting the technical scheme has the following working principle:
the invention adds the waste tinned copper rice to be treated into a grinding ceramic ball, the waste tinned copper rice is mixed and then is put into a vacuum container, the vacuum container is heated, when the temperature reaches above the melting point (232 ℃) of tin, the tin is in a molten state, the molten tin on the surface of the waste tinned copper rice is stripped through the stirring friction action of the grinding ceramic ball and the waste tinned copper rice and the friction action of the waste tinned copper rice under the vacuum condition through the stirring external force action, the separation of the tin and the copper rice is realized, and simultaneously, a small amount of copper is scraped from the surface of the waste tinned copper rice due to mechanical friction, so that the mixed powder of the copper and the tin is obtained.
The applicant found that tin on the surface of the waste tin-plated copper rice is separated in a molten state through a physical process, the tin is changed into a solid state from a liquid state during stirring by continuously stirring in a vacuum container cooling process until the temperature is reduced to be below the melting point of the tin, and the tin is changed into solid powder under the action of shearing force, and the separated tin is not recombined with the waste tin-plated copper rice and is changed into solid powder substances through the friction action of grinding ceramic balls.
The invention has the beneficial effects that:
1. the physical characteristic of low melting point of tin is skillfully utilized, a pure physical separation method is adopted, the tin coating on the surface of the copper rice can be removed to the maximum extent by stirring and separating under a vacuum state and adding the grinding ceramic balls, and the separation process is simple and low in cost compared with the acid leaching process or the electrolysis process in the prior art;
2. the method and the device adopted by the invention are simple, pollution-free, low in cost and high in efficiency, and the tin plating layer and the waste copper rice are efficiently separated;
3. the separated tin-copper powder is directly used for preparing the micro-electrolysis filler without next separation, the treatment process is simple, and the additional value is high;
4. the technological process creatively provides a resource recovery process of the tinned copper rice, can give full play to technological advantages and raw material availability, and obtains unexpected technical effects.
Drawings
FIG. 1 is a process flow diagram of a resource recovery method of waste tin-plated copper rice;
FIG. 2 is a schematic view of an apparatus for resource recovery of waste tin-plated copper rice;
in fig. 2, 1 is a motor, 2 is a vacuum container top cover, 3 is a vacuum container, 4 is a movable sealing sleeve, 5 is an air outlet, 6 is a stirring paddle, and 7 is a rotating shaft.
Detailed Description
Example 1
1) Taking 2kg of waste tinned copper rice with the wire diameter of 2-4mm and the length of 5-12mm, adding 200g of wear-resistant alumina ceramic balls with the diameter of 5mm, and fully mixing;
2) placing the mixture into a vacuum container, heating the vacuum container by an external heating device, controlling the temperature to be 300 ℃, controlling the system pressure of the vacuum container to be 25kpa, stirring the mixture in the vacuum container for 60min by a stirring device, wherein the stirring speed is 600rpm, and stripping the molten tin on the surface of the waste tin-plated copper rice by the stirring friction action of a grinding ceramic ball and the waste tin-plated copper rice and the friction action of the waste tin-plated copper rice, so as to realize the separation of the tin and the copper rice;
3) stopping heating the vacuum container, continuing stirring until the temperature in the vacuum container is reduced to 200 ℃, stopping stirring, scraping tin from the surface of the waste tin-plated copper rice, cooling the tin-plated copper rice into powder under the action of friction, and forming a small amount of copper into powder under the action of friction to obtain copper-tin mixed powder;
4) cooling the vacuum container to room temperature, turning off the vacuum pump, taking out materials in the vacuum container, and separating and recycling ground porcelain balls through electric separation to obtain waste tinned copper rice and copper-tin mixed powder;
5) separating the waste tin-plated copper rice and copper-tin mixed powder by a screening device to obtain the detinned copper rice and copper-tin mixed powder.
The technical effects are as follows: the tin plating layer on the surface of the waste tin-plated copper rice is separated cleanly, and the surface of the copper rice is changed into copper yellow from silvery white before treatment.
Example 2
1) Taking 2kg of waste tinned copper rice with the wire diameter of 2-4mm and the length of 5-12mm, adding 200g of wear-resistant alumina ceramic balls with the diameter of 5mm, and fully mixing;
2) placing the mixture into a vacuum container, heating the vacuum container by an external heating device, controlling the temperature to be 250 ℃, controlling the system pressure of the vacuum container to be 25kpa, stirring the mixture in the vacuum container for 50min by a stirring device, stirring at the rotating speed of 300rpm, stripping the molten tin on the surface of the waste tin-plated copper rice by the stirring friction action of a grinding ceramic ball and the waste tin-plated copper rice and the friction action of the waste tin-plated copper rice, and realizing the separation of the tin and the copper rice;
3) stopping heating the vacuum container, continuing stirring until the temperature in the vacuum container is reduced to 200 ℃, stopping stirring, scraping tin from the surface of the waste tin-plated copper rice, cooling the tin-plated copper rice into powder under the action of friction, and forming a small amount of copper into powder under the action of friction to obtain copper-tin mixed powder;
4) cooling the vacuum container to room temperature, turning off the vacuum pump, taking out materials in the vacuum container, and separating and recycling ground porcelain balls through electric separation to obtain waste tinned copper rice and copper-tin mixed powder;
5) separating the waste tin-plated copper rice and copper-tin mixed powder by a screening device to obtain the detinned copper rice and copper-tin mixed powder.
The technical effects are as follows: the tin plating layer on the surface of the waste tin-plated copper rice is separated cleanly, and the surface of the copper rice is changed into copper yellow from silvery white before treatment.
Claims (10)
1. A resource recovery method is characterized in that: the method comprises the following steps:
1) mixing the waste tin-plated copper rice and the ground ceramic balls according to a certain proportion to obtain a mixture;
2) placing the mixture obtained in the step 1) in a vacuum container, heating the vacuum container to control the temperature at 250-300 ℃, stirring the mixture in the vacuum container for 50-60min, and stripping the molten tin on the surface of the waste tin-plated copper rice through the stirring friction action of the grinding ceramic balls and the waste tin-plated copper rice and the friction action of the waste tin-plated copper rice so as to realize the separation of the tin and the copper rice;
3) stopping heating the vacuum container, continuing stirring until the temperature in the vacuum container is reduced to 200 ℃, stopping stirring, scraping tin from the surface of the waste tin-plated copper rice, cooling the tin-plated copper rice into powder under the action of friction, and forming a small amount of copper into powder under the action of friction to obtain copper-tin mixed powder;
4) cooling the vacuum container, and separating and recovering the ground ceramic balls to obtain waste tinned copper rice and copper-tin mixed powder;
5) and separating the waste tinned copper rice and copper-tin mixed powder to obtain the detinned copper rice and copper-tin mixed powder.
2. A method for resource recovery as claimed in claim 1, wherein: the mass ratio of the waste tin-plated copper rice to the ground ceramic balls is 10: 1.
3. A method of resource recovery according to claim 1 or 2, characterized by: the wire diameter of the waste tin-plated copper rice is 2-4mm, and the length is 5-12 mm.
4. A method for resource recovery as claimed in claim 1, wherein: the grinding ceramic ball is a wear-resistant alumina ceramic ball with the diameter of 5 mm.
5. A method for resource recovery as claimed in claim 1, wherein: the system pressure of the vacuum container is not higher than 25 kPa.
6. A method for resource recovery as claimed in claim 1, wherein: the rotation speed of stirring in the step 2) is 300-600 rpm.
7. A method for resource recovery as claimed in claim 1, wherein: in the step 2), the temperature of the vacuum container is controlled at 250-300 ℃ by heating the vacuum container through an external heating device, and the mixture in the vacuum container is stirred for 50-60min through a stirring device.
8. A method for resource recovery as claimed in claim 1, wherein: in the step 4), the ground ceramic balls are separated and recovered through electric sorting.
9. A method for resource recovery as claimed in claim 1, wherein: cooling the vacuum container to room temperature in the step 4), closing the vacuum pump, taking out the materials in the vacuum container, and separating and recycling the ground ceramic balls.
10. A method for resource recovery as claimed in claim 1, wherein: in the step 5, the waste tin-plated copper rice and copper-tin mixed powder is separated by a screening device.
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| CN201810717411.0A CN108746645B (en) | 2017-01-04 | 2017-01-04 | Resource recovery method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710003581.8A CN106811606B (en) | 2017-01-04 | 2017-01-04 | A kind of recovery method as resource of useless tin-coated copper rice |
| CN201810717411.0A CN108746645B (en) | 2017-01-04 | 2017-01-04 | Resource recovery method |
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| CN201710003581.8A Division CN106811606B (en) | 2017-01-04 | 2017-01-04 | A kind of recovery method as resource of useless tin-coated copper rice |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3615357A (en) * | 1970-02-20 | 1971-10-26 | Horizons Research Inc | Removal of tin from copper scrap |
| CN1125262A (en) * | 1995-06-19 | 1996-06-26 | 邱德富 | Regenerative process and device for tinned copper wire spent material and tin-aluminium waste slag |
| JP3653973B2 (en) * | 1998-03-10 | 2005-06-02 | 住友電装株式会社 | Electric wire separation method and electric wire |
| CN1263875C (en) * | 2001-02-23 | 2006-07-12 | 萧国雄 | Method for recovering tin from tin plating, dipping and welding and apparatus thereof |
| CN101367084B (en) * | 2008-08-18 | 2010-09-29 | 南京东南铜业有限公司 | Process for recycling and manufacturing copper granule from waste and old electric wire and cable |
| CN101625915A (en) * | 2009-08-06 | 2010-01-13 | 中南大学 | Method for recycling waste tin-plated electric wires |
| CN101648202B (en) * | 2009-09-04 | 2011-12-21 | 北京航空航天大学 | Method for recycling and reusing waste electronic element |
| CN101642765B (en) * | 2009-09-04 | 2012-07-04 | 北京航空航天大学 | Recycling method of discarded circuit board |
| CN201785462U (en) * | 2010-09-10 | 2011-04-06 | 北京科技大学 | Dedicated copper and tin separation device for separating and recovering metallic copper and metallic tin of tinned copper nodules |
| CN101937742B (en) * | 2010-09-10 | 2012-05-09 | 北京科技大学 | Method and device for separating and recovering metallic copper and tin in tinplating copper |
| CN102127643B (en) * | 2011-04-07 | 2012-11-21 | 北京科技大学 | Spraying method and device for separating copper from tin in tin-plated copper block |
| CN104625285A (en) * | 2014-12-23 | 2015-05-20 | 湖南万容科技股份有限公司 | Waste circuit board recovery processing method |
| CN105355338A (en) * | 2015-11-10 | 2016-02-24 | 江苏赛尔橡胶股份有限公司 | Method for processing scrap wire and cable |
| CN106111314A (en) * | 2016-06-29 | 2016-11-16 | 广西民族大学 | A kind of method reclaiming metal from discarded circuit board |
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| CN108746645A (en) | 2018-11-06 |
| CN106811606A (en) | 2017-06-09 |
| CN106811606B (en) | 2018-10-26 |
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