CN107546435A - A kind of physical purification method of lithium ion battery recovery positive mix - Google Patents
A kind of physical purification method of lithium ion battery recovery positive mix Download PDFInfo
- Publication number
- CN107546435A CN107546435A CN201710583036.0A CN201710583036A CN107546435A CN 107546435 A CN107546435 A CN 107546435A CN 201710583036 A CN201710583036 A CN 201710583036A CN 107546435 A CN107546435 A CN 107546435A
- Authority
- CN
- China
- Prior art keywords
- positive mix
- ion battery
- lithium ion
- magnetic
- purification method
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
Landscapes
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention relates to a kind of physical purification method of lithium ion battery recovery positive mix, belong to lithium ion battery recovery technology field.The physical purification method of the lithium ion battery recovery positive mix of the present invention, magnetic induction intensity is first used to carry out first time magnetic separation for 2500~3500Gs magnetic field including obtained positive mix will be reclaimed, remove cull, second of magnetic separation is carried out to remaining powder using magnetic field of the magnetic induction intensity more than 7000Gs again, cull is collected, is produced；The positive electrode of the lithium ion battery contains at least one of cobalt, manganese, iron and nickel element.Method of purification technique of the invention is simple, equipment investment is few, cost is low, wide adaptability, and can obtain the positive mix that purity reaches more than 96% by a weak magnetic separation, while can also improve the rate of recovery of aluminium.
Description
Technical field
The present invention relates to a kind of physical purification method of lithium ion battery recovery positive mix, belongs to lithium ion battery recovery
Technical field.
Background technology
As country widelys popularize to electric automobile, future will face the problem of a large amount of dynamic lithium batteries are scrapped, according to
China Automotive Technology ＆ Research Center, it is expected that the rate of recovery of following China's waste battery less than 2%.Contain in waste and old lithium ion battery
There are the repeatable resource utilized, such as the valuable metal such as aluminium, copper and graphite, positive electrode etc., simultaneously containing substantial amounts of electrolysis
Matter solution；If these waste lithium cells are dealt with improperly, wasting of resources significant wastage, and serious environmental pollution will be caused.
Therefore, the recovery to waste and old lithium ion battery is significant.
Because more than 90% is recovered according to a price material all on positive plate and negative plate, to lithium ion battery in lithium ion battery
Recovery be exactly mainly to reclaim the materials such as copper, aluminium, positive mix and negative pole powder.Based lithium-ion battery positive plate is mainly by positive pole collection
Fluid aluminium foil, positive electrode, binding agent and other functional additives composition.Although the independent recovery as plus plate current-collecting body aluminium foil
Value be not so good as negative current collector, but the metal such as lithium in positive electrode, cobalt is the resource for having strategic importance, and applying waste lithium ionic is electric
The positive electrode in pond can be as important secondary resource.It is main at present that the purity of regenerant is improved using chemical method,
Method is ripe, beneficial to industrialization, but can produce secondary pollution.And when using the positive mix of the method pair of physics to reclaim,
Generally use fret mill is crushed positive plate, obtains the material being mainly made up of aluminium and positive mix.Because aluminium prolongs
Malleability is good, and the alumina particles in crushing rear material are larger, is separated substantial amounts of aluminium with positive mix by sieving.Selection is suitable
Screen cloth carry out two level screening, the recovery purity of positive mix can reach 95%.If expecting the higher positive mix of purity,
Then need to be sieved using thinner screen cloth, in this case, the purity of positive mix can also reach more than 98%, still
Positive mix is sieved using thinner screen cloth, the larger positive mix particle of a large amount of particle diameters is mixed into alumina particles, is made back
Receive the obtained purity of aluminium and effective rate of recovery of positive mix is greatly reduced.In addition, carried out to positive mix at recovery
During reason, the sheet iron strip that inevitably equipment attrition comes off enters in positive mix, further increases physical method point
From the difficulty of positive mix, how physical method recovery is further improved in the case where ensureing effective rate of recovery of positive mix
The purity of obtained positive mix turns into urgent problem to be solved.
The content of the invention
It is an object of the invention to provide a kind of physical purification method of lithium ion battery recovery positive mix, can provide
Positive mix purity is improved while the rate of recovery.
In order to realize the above object the technical solution adopted in the present invention is：
A kind of physical purification method of lithium ion battery recovery positive mix, comprises the following steps：Recovery is obtained just
Pole powder first uses magnetic induction intensity to carry out first time magnetic separation for 2500~3500Gs magnetic field, removes cull, then using magnetic
Magnetic field of the induction more than 7000Gs carries out second of magnetic separation to remaining powder, collects cull, produces；The lithium-ion electric
The positive electrode in pond contains at least one of cobalt, manganese, iron and nickel element.
The positive electrode is at least one of cobalt acid lithium, LiMn2O4, LiFePO4, nickle cobalt lithium manganate.
The particle diameter of the positive mix is 50~100 μm.
Before first time magnetic separation is carried out, positive mix is dried processing；The temperature of drying process is 120~150 DEG C.
Before first time magnetic separation is carried out, ball-milling treatment is carried out to positive mix；The rotating speed of ball-milling treatment is 200~300r/
Min, the time of ball-milling treatment is 0.2~1h.
The magnetic separation use for high gradient strong magnetic separator.
The physical purification method of above-mentioned lithium ion battery recovery positive mix is also included the cull weight of second of magnetic separation
Second mining carries out magnetic separation with magnetic field of the magnetic induction intensity more than 7000Gs.
The physical purification method of above-mentioned lithium ion battery recovery positive mix is also included the remaining powder after second of magnetic separation
Material repeats to carry out magnetic separation using magnetic field of the magnetic induction intensity more than 7000Gs.
The physical purification method of the lithium ion battery recovery positive mix of the present invention, using the method for physics, in low-intensity magnetic field
In the presence of the iron tramp that will reclaim in powder remove, recycle positive electrode that there is the principle of weak magnetic, by after iron removaling just
Pole powder and alumina particles etc. separate, and technique is simple, and equipment investment is few, and cost is low, and can be obtained by second of magnetic separation
Purity reaches more than 96% positive mix, while can also improve the rate of recovery of alumina particles；Due to by positive mix and aluminium
Before grain is separated, the step of also having carried out iron removal by magnetic separation so that method of purification adaptability of the invention is wider, disclosure satisfy that
A variety of physical methods reclaim the purification needs of obtained positive mix.Because binding agent and additive can not pass through physical method point
From selecting, binding agent and additive are contained using the positive mix after the physical purification method purification of the present invention.
Brief description of the drawings
Fig. 1 is that the lithium ion battery of embodiment 1 reclaims the physical purification flow chart of positive mix.
Embodiment
Technical scheme is further described below in conjunction with embodiment.
The positive mix for being used to purify in embodiment reclaims what is obtained using the method comprised the following steps：It will return
Receive obtained positive plate to crush using fret mill, the powder that particle diameter is not more than 60 mesh is obtained, then successively using 60 mesh, 80
Purpose sieved through sieve, that is, obtain the positive mix that purity is 95%.Because the ductility of aluminium is preferable, will be returned using fret mill
Aluminum shot footpath is larger in the powder that the positive plate that receipts obtain obtains after crushing, and by screening, most of aluminium is stayed on sieve, positive pole
Powder sifts.Impurity in positive mix is mainly the iron filings to be dropped when grinding in equipment, and can pass through the grain of screen cloth
The less alumina particles in footpath.First time magnetic separation is carried out to the positive mix after ball milling by using magnetic induction intensity weaker magnetic field,
Iron filings therein can be selected.
In embodiment, the equipment for magnetic separation is high gradient strong magnetic separator, the magnetic of high gradient strong magnetic separator
The length of roller is 500mm；It is 2~3kg/min that delivery rate is controlled during magnetic separation.
Embodiment 1
The physical purification method of the lithium ion battery recovery positive mix of the present embodiment, comprises the following steps：
1) obtained cathode of lithium iron phosphate lithium ion battery powder will be reclaimed and 30min is dried at 120 DEG C；Then exist
Ball milling 0.5h under 300r/min rotating speed, obtain the positive mix that particle diameter is 50~100 μm；
2) magnetic induction intensity is used to carry out first time magnetic for 3000Gs magnetic field the positive mix after ball milling in step 1)
Choosing, cull is removed, obtains remaining powder；
3) use magnetic induction intensity to carry out second of magnetic separation to remaining powder for 8000Gs magnetic field, collect cull, i.e.,
.
Using the positive mix obtained by the physical purification method of the lithium ion battery recovery positive mix of the present embodiment
Purity is 96%, and the separation rate of aluminium is 96%.
Embodiment 2
The physical purification method of the lithium ion battery recovery positive mix of the present embodiment, comprises the following steps：
1) obtained manganate lithium ion battery positive mix will be reclaimed and 30min is dried at 150 DEG C；Then in 200r/
Ball milling 1h under min rotating speed, obtain the positive mix that particle diameter is 50~100 μm；
2) magnetic induction intensity is used to carry out first time magnetic for 2500Gs magnetic field the positive mix after ball milling in step 1)
Choosing, cull is removed, obtains remaining powder；
3) use magnetic induction intensity to carry out second of magnetic separation to remaining powder for 8000Gs magnetic field, collect cull；
4) use magnetic induction intensity to carry out magnetic separation to the residue after second of magnetic separation for 10000Gs magnetic field, collect choosing
Go out thing；
5) collection step 3) and step 4) in cull, produce.
Using the positive mix obtained by the physical purification method of the lithium ion battery recovery positive mix of the present embodiment
Purity is 98%, and the separation rate of aluminium is 98%.
Embodiment 3
The physical purification method of the lithium ion battery recovery positive mix of the present embodiment, comprises the following steps：
1) obtained cobalt acid lithium lithium ion cell positive powder will be reclaimed and 30min is dried at 135 DEG C；Then in 300r/
Ball milling 0.2h under min rotating speed, obtain the positive mix that particle diameter is 50~100 μm；
2) magnetic induction intensity is used to carry out first time magnetic for 3500Gs magnetic field the positive mix after ball milling in step 1)
Choosing, cull is removed, obtains remaining powder；
3) use magnetic induction intensity to carry out second of magnetic separation to remaining powder for 10000Gs magnetic field, collect cull；
4) use magnetic induction intensity to carry out magnetic separation to the positive mix selected in step 3) for 12000Gs magnetic field, select
Thing is the higher positive mix of purity.
Using the positive mix obtained by the physical purification method of the lithium ion battery recovery positive mix of the present embodiment
Purity is 98%, and the separation rate of aluminium is 98%.
Claims (8)
- A kind of 1. physical purification method of lithium ion battery recovery positive mix, it is characterised in that：Including recovery is obtained just Pole powder first uses magnetic induction intensity to carry out first time magnetic separation for 2500~3500Gs magnetic field, removes cull, then using magnetic Magnetic field of the induction more than 7000Gs carries out second of magnetic separation to remaining powder, collects cull, produces；The lithium-ion electric The positive electrode in pond contains at least one of cobalt, manganese, iron and nickel element.
- 2. the physical purification method of lithium ion battery recovery positive mix according to claim 1, it is characterised in that：It is described Positive electrode is at least one of cobalt acid lithium, LiMn2O4, LiFePO4, nickle cobalt lithium manganate.
- 3. the physical purification method of lithium ion battery recovery positive mix according to claim 1, it is characterised in that：It is described The particle diameter of positive mix is 50~100 μm.
- 4. the physical purification method of lithium ion battery recovery positive mix according to claim 1, it is characterised in that：Entering Before row first time magnetic separation, positive mix is dried processing, the temperature of drying process is 120~150 DEG C.
- 5. the physical purification method of lithium ion battery recovery positive mix according to claim 1, it is characterised in that：Entering Before row first time magnetic separation, ball-milling treatment is carried out to positive mix；The rotating speed of ball-milling treatment is 200~300r/min, ball-milling treatment Time be 0.2~1h.
- 6. the physical purification method of lithium ion battery recovery positive mix according to claim 1, it is characterised in that：It is described Magnetic separation use for high gradient strong magnetic separator.
- 7. the physical purification method of lithium ion battery recovery positive mix according to claim 1, it is characterised in that：Also wrap Include and repeat the cull of second of magnetic separation to carry out magnetic separation using magnetic field of the magnetic induction intensity more than 7000Gs.
- 8. the physical purification method of lithium ion battery recovery positive mix according to claim 1, it is characterised in that：Also wrap Include and repeat the remaining powder after second of magnetic separation to carry out magnetic separation using magnetic field of the magnetic induction intensity more than 7000Gs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710583036.0A CN107546435A (en) | 2017-07-17 | 2017-07-17 | A kind of physical purification method of lithium ion battery recovery positive mix |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710583036.0A CN107546435A (en) | 2017-07-17 | 2017-07-17 | A kind of physical purification method of lithium ion battery recovery positive mix |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107546435A true CN107546435A (en) | 2018-01-05 |
Family
ID=60971077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710583036.0A Pending CN107546435A (en) | 2017-07-17 | 2017-07-17 | A kind of physical purification method of lithium ion battery recovery positive mix |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107546435A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109830773A (en) * | 2019-03-19 | 2019-05-31 | 泰顺永庆电力技术有限公司 | Waste lithium cell recovery and treatment method |
| CN114006066A (en) * | 2020-12-22 | 2022-02-01 | 深圳清研装备科技有限公司 | Method for separating and recovering anode and cathode mixed powder of waste ternary lithium ion battery |
| CN114300776A (en) * | 2021-12-30 | 2022-04-08 | 中南大学 | Method for recycling and screening lithium ion battery material |
| CN114345539A (en) * | 2021-12-31 | 2022-04-15 | 湖南江冶新能源科技股份有限公司 | Method for separating anode powder and cathode powder of waste lithium battery |
| CN116837216A (en) * | 2023-09-01 | 2023-10-03 | 北京怀柔北珂新能源科技有限公司 | Impurity removal method for recycling positive electrode powder of lithium ion battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101607227A (en) * | 2008-06-16 | 2009-12-23 | 中冶集团武汉冶建技术研究有限公司 | The method and the magnetic plant of slag steel iron removal by magnetic separation |
| CN105233977A (en) * | 2015-11-05 | 2016-01-13 | 鞍钢集团矿业公司 | Tailing recovery process adopting magnetic separation-circulating roasting-regrinding and magnetic separation method |
| CN106920999A (en) * | 2017-04-01 | 2017-07-04 | 中航锂电（洛阳）有限公司 | A kind of recovery method of anode material for lithium-ion batteries |
-
2017
- 2017-07-17 CN CN201710583036.0A patent/CN107546435A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101607227A (en) * | 2008-06-16 | 2009-12-23 | 中冶集团武汉冶建技术研究有限公司 | The method and the magnetic plant of slag steel iron removal by magnetic separation |
| CN105233977A (en) * | 2015-11-05 | 2016-01-13 | 鞍钢集团矿业公司 | Tailing recovery process adopting magnetic separation-circulating roasting-regrinding and magnetic separation method |
| CN106920999A (en) * | 2017-04-01 | 2017-07-04 | 中航锂电（洛阳）有限公司 | A kind of recovery method of anode material for lithium-ion batteries |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109830773A (en) * | 2019-03-19 | 2019-05-31 | 泰顺永庆电力技术有限公司 | Waste lithium cell recovery and treatment method |
| CN114006066A (en) * | 2020-12-22 | 2022-02-01 | 深圳清研装备科技有限公司 | Method for separating and recovering anode and cathode mixed powder of waste ternary lithium ion battery |
| CN114006066B (en) * | 2020-12-22 | 2024-03-15 | 深圳清研锂业科技有限公司 | Method for separating and recycling mixed powder of positive and negative electrodes of waste ternary lithium ion battery |
| CN114300776A (en) * | 2021-12-30 | 2022-04-08 | 中南大学 | Method for recycling and screening lithium ion battery material |
| CN114300776B (en) * | 2021-12-30 | 2023-10-17 | 江西原子锂电有限公司 | Method for recycling and screening lithium ion battery material |
| CN114345539A (en) * | 2021-12-31 | 2022-04-15 | 湖南江冶新能源科技股份有限公司 | Method for separating anode powder and cathode powder of waste lithium battery |
| CN116837216A (en) * | 2023-09-01 | 2023-10-03 | 北京怀柔北珂新能源科技有限公司 | Impurity removal method for recycling positive electrode powder of lithium ion battery |
| CN116837216B (en) * | 2023-09-01 | 2023-11-21 | 北京怀柔北珂新能源科技有限公司 | Impurity removal method for recycling positive electrode powder of lithium ion battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100449011C (en) | Method for recovering valuable metal in invalid lithium ion battery | |
| CN107546435A (en) | A kind of physical purification method of lithium ion battery recovery positive mix | |
| CN103346365B (en) | Method for recycling negative material from waste lithium ion battery | |
| CN101710632B (en) | Method for recovering and restoring anode material graphite of waste lithium ion battery | |
| CN1262042C (en) | Method for regenerating anode materials of waste lithium ion secondary battery | |
| CN104810566B (en) | A kind of waste lithium iron phosphate electrokinetic cell green reclaim processing method | |
| CN103045870B (en) | Method for comprehensively recycling valuable metal from abandoned lithium ion batteries | |
| CN101383442B (en) | Method for recovering and preparing lithium cobaltate from waste lithium ionic cell | |
| CN105428745A (en) | Method for comprehensive harmless recovery and utilization of waste lithium ion power battery | |
| CN102208707A (en) | Method for repair and regeneration of waste lithium iron phosphate battery cathode material | |
| CN102738539A (en) | Method and apparatus for recovering lithium iron phosphate material from positive plates of waste lithium iron phosphate batteries | |
| CN104183888A (en) | Green method for recovery and disposal of waste lithium iron phosphate power battery | |
| CN112510281B (en) | Method for recovering all components of waste lithium ion battery | |
| CN107946686A (en) | A kind of waste and old lithium ion battery recovery method | |
| CN111430831A (en) | Method for recovering waste lithium ion battery negative electrode material | |
| CN113083848A (en) | Sorting and recycling method for positive and negative electrode materials of waste lithium iron phosphate batteries | |
| CN108172926A (en) | A kind of waste lithium ion cell anode material repair methods | |
| CN107069078A (en) | A kind of recovery method of electrodes of lithium-ion batteries material | |
| CN107492695A (en) | The separation method of positive/negative plate in a kind of lithium ion battery removal process | |
| CN111252757A (en) | Method for preparing graphene by using waste lithium ion power battery | |
| CN115058598A (en) | Recovery method of waste sodium-ion battery | |
| CN102332623B (en) | Method for recovering anode material of lithium ion battery | |
| CN105355997A (en) | Method for separating current collector from active material of lithium battery and application of method | |
| CN105355998A (en) | Recovery method of LiFePO4 positive electrode material | |
| CN106920999A (en) | A kind of recovery method of anode material for lithium-ion batteries |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180105 |