CN107768763A - A kind of method that waste and old lithium ion battery recovery makes NCM salt - Google Patents
A kind of method that waste and old lithium ion battery recovery makes NCM salt Download PDFInfo
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- CN107768763A CN107768763A CN201710976809.1A CN201710976809A CN107768763A CN 107768763 A CN107768763 A CN 107768763A CN 201710976809 A CN201710976809 A CN 201710976809A CN 107768763 A CN107768763 A CN 107768763A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Manufacture And Refinement Of Metals (AREA)
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Abstract
The present invention provides a kind of waste and old lithium ion battery method that recovery makes NCM salt (sulfate mixture of nickel and cobalt containing manganese), the technique include broken, pyrolysis, sorting, leach, removal of impurities, with liquid, Crystallization Procedure.Beneficial effects of the present invention are embodied in：On the one hand whole production technology does not bring soluble alkali metal ion (such as potassium, sodium) into, it is possible to achieve water circulation uses, and realizes wastewater zero discharge, has saved great lot of water resources；On the other hand, liquid is cleaned through with after liquid process, obtaining containing a certain proportion of NCM salt using crystallization principle, avoiding extraction process in process, avoid producing substantial amounts of waste water and gas.In addition, the NCM salt of the present invention can be used as the raw material of production presoma, according to the proportion requirement of persursor material, adjusted the preparation before can completing precursor synthesis using a small amount of nickel sulfate, cobaltous sulfate, manganese sulfate, improve production efficiency while simplification process.
Description
Technical field
The present invention relates to waste and old lithium ion battery recycling field, and in particular to a kind of to be returned by raw material of waste and old lithium ion battery
Receive the method for making NCM salt.
Background technology
The recovery of old and useless battery has turned into China environmental protection with recycling and battery industry sustainable development must
The important topic that must be faced.China is currently global maximum battery production and consumption big country, with mobile phone, notebook computer,
The popularization of the portable products such as digital product, rechargeable battery consumption as needed for lithium ion battery has turned into people's daily life
Product；Particularly with the outburst of the electric automobile of nickel-cobalt-manganese ternary material lithium ion battery, therewith caused waste battery amount also into
Geometry multiple increases.Because old and useless battery contains heavy metal, organic solvent, electrolyte etc., if random without effectively processing
Abandon, serious and lasting pollution can be caused to surrounding environment such as soil, underground water etc., have to ecology and human health larger
Potential hazard.The recovery of old and useless battery is not only the needs of environmental protection and the international Battery Market of developing with recycling,
And China's strategy metal resource scarcity situation can be alleviated.
At present, the prior art for reclaiming lithium ion battery recycling typically takes pyrolysis, crushes, sorts, leaching, removing
Miscellaneous, nickel cobalt manganese extraction, precursor synthesis technique；Because extraction process can use extractant, You Jirong in this technological process
Agent, sodium hydroxide, hydrochloric acid, substantial amounts of volatile organic content and waste water can be produced, immense pressure is brought to environment, using environmental protection
Although facility can play certain effect, but certain pressure can be brought to production cost；Particularly organic solvent has easy
Explosion hazard is fired, there is also certain potential safety hazard.Waste and old lithium ion battery recycling how is reclaimed, while is reduced to environment
Pollution, reduce wasting of resources phenomenon, be one of to need to solve the problems, such as.
The content of the invention
To solve above-mentioned prior art problem, the present invention provides the side that a kind of waste and old lithium ion battery recovery makes NCM salt
Method, whole production technology does not bring soluble alkali metal ion (such as potassium, sodium) into, and without extraction process, avoids producing largely
Waste water and gas.
The technical scheme is that, there is provided a kind of method that waste and old lithium ion battery recovery makes NCM salt, step is such as
Under：
(1) battery is obtained after waste and old lithium ion battery being carried out into just broken and sorting, pyrolysis, fine crushing and screening process
Powder；
(2) step (1) the battery powder carries out pulp processing, and the battery powder after the pulp is soaked in pickling tank
Go out, leachate obtains filtrate through separation of solid and liquid；
(3) step (2) filtrate obtains the liquid that cleans through the process that cleans；
(4) step (3) the removal of impurities liquid passes through the content ratio with liquid process adjustment nickel cobalt manganese and obtains conjugate solutions；
(5) conjugate solutions obtains NCM vitriols through evaporative crystallization and centrifuge dripping process.
Preferred scheme, the process that cleaned described in step (3) include removing copper process；The copper process of removing includes what is carried out successively
Copper removal and secondary copper removal；Copper removal is that iron powder reaction displacement copper removal is added into the filtrate；It is described secondary to remove
Copper is the filtrate and sulphion reaction generation copper sulfide precipitation, reaches copper removal purpose through separation of solid and liquid filter residue.
Preferred scheme, the process that cleaned described in step (3) include iron removaling aluminium process；The iron removaling aluminium process is：To copper removal
Hydrogen peroxide reaction is added in removal of impurities liquid afterwards, for being ferric ion by oxidation of divalent iron ion, is heated using steam；Add again
It is 3.0~4.5 to add dry powder slurry regulation system pH, is sunk for molysite and aluminium salt hydrolysis generation iron hydroxide and aluminium hydroxide
Form sediment, reach iron removaling aluminium purpose through separation of solid and liquid filter residue.
Preferred scheme, the process that cleaned described in step (3) include removing calcium and magnesium lithium process；The removing calcium and magnesium lithium process include according to
A removing calcium and magnesium lithium and secondary removing calcium and magnesium lithium for secondary progress；Removing calcium and magnesium lithium is addition HF and MnCO3Reaction, remove molten
Calcium, magnesium, lithium ion in liquid, it is 0.5~1.0 to control reaction pH；The secondary removing calcium and magnesium lithium is to continue to add MnCO3It is anti-with HF
Should, for further removing foreign ion in solution, it is 4.0~5.0 to control reaction pH.
Preferred scheme, also include discharge process before waste and old lithium ion battery described in step (1) is just broken, it is described to discharge
Cheng Wei：Continue 24~72h in a kind of solution that waste and old lithium ion battery is immersed in sodium carbonate liquor or sodium chloride solution.
Preferred scheme, sorting described in step (1) are to sub-elect diaphragm paper and a small amount of plastic casing using electrostatic separator.
Preferred scheme, pyrolysis described in step (1) are carried out in rotary kiln, and pyrolysis temperature is 500~800 DEG C.
Preferred scheme, battery powder can carry out pre- removal of impurities processing described in step (1)；The pre- removal of impurities processing uses magnetic separation,
Remove the one or more in iron plate, copper sheet and aluminium flake in the battery powder.
Preferred scheme, leaching described in step (2) are specially：To the battery powder addition sulfuric acid and hydrogen peroxide after the pulp
Reaction, the leachate of lithium, nickel, cobalt, manganese is included for leaching；Heated using steam, control ph value of reaction completes reaction 1~3.
Preferred scheme, it is with liquid process described in step (4)：The nickel cobalt manganese content of the removal of impurities liquid is detected, according to detection
As a result the ratio of nickel cobalt manganese in adjustment removal of impurities liquid；According to ternary precursor material proportion requirement, then add manganese sulfate, nickel sulfate,
Cobaltous sulfate, the ratio for adjusting nickel cobalt manganese in removal of impurities liquid obtain satisfactory conjugate solutions.
Preferred scheme, conjugate solutions described in step (5) use steam indirectly heat in evaporative crystallization kettle.
Preferred scheme, the mother liquor that conjugate solutions obtains through evaporative crystallization and centrifuge dripping process described in step (5) can return
Row removal of impurities process is taken in recycle.
Preferred scheme, hydrogen sulfide can be added in the case of stirring during the secondary copper removal, for separating copper sulfide
Precipitation.
Beneficial effects of the present invention are embodied in, there is provided a kind of waste and old lithium ion battery recovery making NCM salt be (nickel and cobalt containing manganese
Sulfate mixture) method, the technique include broken, pyrolysis, sorting, leach, removal of impurities, with liquid, Crystallization Procedure, it is and existing
Technology is compared, and on the one hand whole production technology does not bring soluble alkali metal ion (such as potassium, sodium) into, it is possible to achieve water circulation makes
With realizing wastewater zero discharge, saved great lot of water resources；On the other hand, liquid is cleaned through with after liquid process, being using crystallization principle
Obtain containing a certain proportion of NCM salt, avoid extraction process in process, avoid producing substantial amounts of waste water and gas.It is in addition, of the invention
NCM salt can as the raw material of production presoma, according to persursor material proportion requirement, using a small amount of nickel sulfate, cobaltous sulfate,
Manganese sulfate is adjusted the preparation before can completing precursor synthesis, and production efficiency is improved while simplifying process.
Brief description of the drawings：
Fig. 1 is the method flow diagram that the recovery of waste and old lithium ion battery of the embodiment of the present invention makes NCM salt.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Refer to shown in Fig. 1, specific embodiment provided by the invention is as follows：
The method that a kind of waste and old lithium ion battery recovery of the present embodiment makes NCM salt, step are as follows：
(1) battery is obtained after waste and old lithium ion battery being carried out into just broken and sorting, pyrolysis, fine crushing and screening process
Powder；It is for simple rough decomposition battery the purpose of shattering process at the beginning of wherein, its volume is diminished, is electricity in follow-up pyrogenic processes
Each component is sufficiently destroyed, is pyrolyzed in pond；
(2) step (1) the battery powder carries out pulp processing, and the battery powder after the pulp is soaked in pickling tank
Go out, leachate obtains filtrate through separation of solid and liquid；
(3) step (2) filtrate obtains the liquid that cleans through the process that cleans；
(4) step (3) the removal of impurities liquid passes through the content ratio with liquid process adjustment nickel cobalt manganese and obtains conjugate solutions；
(5) conjugate solutions obtains NCM vitriols through evaporative crystallization and centrifuge dripping process.
Preferred embodiment scheme, the process that cleaned described in step (3) include removing copper process；The copper process of removing is included successively
The copper removal and secondary copper removal carried out；Copper removal is that iron powder reaction displacement copper removal is added into the filtrate；It is described
Secondary copper removal is the filtrate and sulphion reaction generation copper sulfide precipitation, reaches copper removal purpose through separation of solid and liquid filter residue.Once
Copper removal adds iron powder into the filtrate, and reaction temperature is 50~90 DEG C, and pH is 1.0~2.0, reaction time 4h；It is secondary to remove
Copper temperature is 40~80 DEG C, and pH is 2.0~4.0, reaction time 4h；Removal of impurities liquid after separation of solid and liquid obtains copper removal.Once
With iron powder displacement reaction, a large amount of copper removals occur for filtrate in copper removal；Filtrate is reacted generation copper sulfide with sulphion and sunk in secondary copper removal
Form sediment, accurate copper removal.
Preferred embodiment scheme, the process that cleaned described in step (3) include iron removaling aluminium process；The iron removaling aluminium process is：
Hydrogen peroxide reaction is added into the removal of impurities liquid after copper removal, for being ferric ion by oxidation of divalent iron ion, using steam plus
Heat, reaction temperature are 70~95 DEG C, and the reaction time is 3~6h；Adding dry powder slurry again, (main component is calcium carbonate CaCO3)
Regulation system pH is 3.0~4.5, for molysite and aluminium salt hydrolysis generation iron hydroxide and aluminum hydroxide precipitation；In this pH condition
Under, molysite and aluminium salt hydrolysis generation iron hydroxide and aluminum hydroxide precipitation in solution, while calcium sulfate precipitation is produced, through solid-liquid
Separation filter residue reaches iron removaling aluminium purpose.
Preferred embodiment scheme, the process that cleaned described in step (3) include removing calcium and magnesium lithium process；The removing calcium and magnesium lithium process
Including the removing calcium and magnesium lithium carried out successively and secondary removing calcium and magnesium lithium；Removing calcium and magnesium lithium is addition HF and MnCO3Reaction,
Calcium, magnesium, lithium ion in solution are removed, it is 0.5~1.0 to control reaction pH；The secondary removing calcium and magnesium lithium is to continue to add MnCO3With
HF reacts, and for further removing foreign ion in solution, it is 4.0~5.0 to control reaction pH.In the present embodiment, examine first
Survey the content of various ions in the removal of impurities liquid after iron removaling aluminium, then added repeatedly according to testing result concentration be about 0.1~
0.5mol/LHF and MnCO3A removing calcium and magnesium lithium is carried out, a large amount of to remove magnalium impurity, reaction temperature is 20~50 DEG C, pH 0.5
~1.0, reaction time 8h；Continuously add MnCO3, micro- excess during using HF, reaction temperature is 20~50 DEG C, pH is 4.0~
5.0,4~6h of reaction time, lithium ion participate in the participation reaction generations pair such as reaction generation lithium fluoride precipitation, a small amount of nickel, cobalt, manganese
The villiaumite precipitation answered, accurate calcium, magnesium and the aluminium ion removed in solution.The calcium and magnesium lithium slag obtained after separation of solid and liquid can be used as carbon
The raw materials for production of sour lithium.
Preferred embodiment scheme, also include discharge process before waste and old lithium ion battery described in step (1) is just broken, it is described
Discharge process is：Continue 24~72h in a kind of solution that waste and old lithium ion battery is immersed in sodium carbonate liquor or sodium chloride solution.
In the case of also having remaining capacity after some waste and old lithium ion batteries place a period of time, to ensure that electrolysis is safe, it is necessary to right
Waste lithium cell is discharged, and battery is immersed in 0.5~5.0% sodium carbonate liquor (or sodium chloride solution) and continues 24~72h,
It is conductive using Enthalpy of Electrolytes in Aqueous Solutions sodium carbonate, battery short circuit is reached electric discharge purpose.
Preferred embodiment scheme, sorting described in step (1) are to sub-elect diaphragm paper and a small amount of modeling using electrostatic separator
Expect shell.
Preferred embodiment scheme, pyrolysis described in step (1) are carried out in rotary kiln, and pyrolysis temperature is 500~800 DEG C.
It is pyrolyzed through just broken waste lithium cell into rotary kiln, is into the waste and old lithium ion battery shell in rotary kiln now
Aluminum hull, iron-clad, electrolyte solvent main component are volatile organic matter carbonates；In anaerobic environment, part carbonates
And PVDF is carbonized due to drastically decomposing.
Preferred embodiment scheme, battery powder can carry out pre- removal of impurities processing described in step (1)；The pre- removal of impurities processing uses
Magnetic separation, removes the one or more in iron plate, copper sheet and aluminium flake in the battery powder, and obtained iron plate, copper sheet and aluminium flake can be with
It is directly outer to sell.
Preferred embodiment scheme, leaching described in step (2) are specially：To after the pulp battery powder addition sulfuric acid and
Hydrogen peroxide is reacted, and the leachate of lithium, nickel, cobalt, manganese is included for leaching；Heated using steam, control ph value of reaction is complete 1~3
Into reaction.The extraction temperature is 70~90 DEG C, and 36h is heated using steam；Initial sulfuric acid concentration is 200~500g/L.Battery
After slurry, in pickling tank with a kind of solution reaction in sulfuric acid and hydrogen peroxide or sodium metabisulfite solution, generation comprising lithium,
Nickel, cobalt, the soluble sulphate of manganese.With the progress of reaction, sulfuric acid is gradually consumed, adjusted during the course of the reaction using sulfuric acid
PH value is that 1~3 completion is reacted, and the filter residue (carbon black slag) that leachate obtains through separation of solid and liquid after reaction send dangerous waste temporary library to keep in.
Preferred embodiment scheme, it is with liquid process described in step (4)：Detect the nickel cobalt manganese content of the removal of impurities liquid, root
The ratio of nickel cobalt manganese in removal of impurities liquid is adjusted according to testing result；According to ternary precursor material proportion requirement, then add manganese sulfate, sulphur
Sour nickel, cobaltous sulfate, the ratio for adjusting nickel cobalt manganese in removal of impurities liquid obtain satisfactory conjugate solutions.It is described to be with liquid process temperature
70~90 DEG C, pH is 3.0~5.0, and the residence time is 6~8h.In liquid process is matched somebody with somebody described in the present embodiment, removed first described in detection
The nickel cobalt manganese content of miscellaneous liquid, the ratio of nickel cobalt manganese in removal of impurities liquid is adjusted according to testing result；According to different ternary precursor materials
Proportion requirement, then add manganese sulfate, nickel sulfate, cobaltous sulfate, the ratio of nickel cobalt manganese obtains satisfactory in adjustment removal of impurities liquid
Conjugate solutions.
Preferred embodiment scheme, conjugate solutions described in step (5) use steam indirectly heat in evaporative crystallization kettle, matched somebody with somebody
Solution is closed through being concentrated by evaporation, separates out the vitriol (i.e. NCM vitriols) containing nickel cobalt manganese.
Preferred embodiment scheme, the mother that conjugate solutions obtains through evaporative crystallization and centrifuge dripping process described in step (5)
Liquid is recyclable to carry out the process recycling that cleans.The mother liquor that NCM vitriols obtain through centrifuge dripping can return to copper removal groove and enter
Row recycles, into dedoping step next time, it is possible to achieve whole sulfuric acid technology of threonates water circulation uses, and saves water money
Source.
Preferred embodiment scheme, hydrogen sulfide can be added in the case of stirring during the secondary copper removal, for separating
Copper sulfide precipitation；Hydrogen sulfide is added under agitation, is fully reacted with sulphion beneficial to copper ion, and copper is removed beneficial to further
Ion.
In the description of embodiments of the invention, it is to be understood that term " on ", " under ", "front", "rear", " left side ",
" right side ", " hard straight ", " level ", " finger such as " center ", " top ", " bottom ", " top ", " bottom ", " interior ", " outer ", " inner side ", " outside "
The orientation or position relationship shown is based on orientation shown in the drawings or position relationship, merely to making in the description present invention and simplifying
Description, rather than the device or element of instruction or hint meaning must have specific orientation, with specific azimuth configuration and behaviour
Make, therefore be not considered as limiting the invention.Wherein, the region or space that " inboard " refers to inside or fenced up.It is " outer
Enclose " refer to region around certain particular elements or specific region.
In the description of embodiments of the invention, term " first ", " second ", " the 3rd ", " the 4th " are only used for describing mesh
, and it is not intended that instruction or hint relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, limit
Surely " first ", " second ", " the 3rd ", the feature of " the 4th " express or implicitly include one or more spy
Sign.In the description of the invention, unless otherwise indicated, " multiple " are meant that two or more.
, it is necessary to illustrate in the description of embodiments of the invention, unless otherwise clearly defined and limited, term
" installation ", " connected ", " connection ", " assembling " should be interpreted broadly, for example, it may be being fixedly connected or detachably connecting
Connect, or be integrally connected；Can be joined directly together, can also be indirectly connected by intermediary, can be two element internals
Connection.For the ordinary skill in the art, above-mentioned term in the present invention specific can be understood with concrete condition
Implication.
In the description of embodiments of the invention, specific features, structure, material or feature can in any one or
Combined in an appropriate manner in multiple embodiments or example.
In the description of embodiments of the invention, it is to be understood that what "-" and "~" represented is that two values are same
Scope, and the scope includes end points.Such as:" A-B " represents to be more than or equal to A, and the scope less than or equal to B." A~B "
Expression is more than or equal to A, and the scope less than or equal to B.
In the description of embodiments of the invention, the terms "and/or", only it is a kind of describe affiliated partner pass
Connection relation, expression may have three kinds of relations, for example, A and/or B, can be represented：Individualism A, while A and B be present, individually
These three situations of B be present.In addition, character "/" herein, it is a kind of relation of "or" to typically represent forward-backward correlation object.
While there has been shown and described that this embodiments of the invention, for the ordinary skill in the art, can
It a variety of to the progress of these embodiments can be changed without departing from the principles and spirit of the present invention with understanding, changed, replaced
Change and modification, the scope of the present invention is defined by the appended.
Claims (10)
1. a kind of method that waste and old lithium ion battery recovery makes NCM salt, it is characterised in that step is as follows：
(1) battery powder is obtained after waste and old lithium ion battery being carried out into just broken and sorting, pyrolysis, fine crushing and screening process；
(2) step (1) the battery powder being subjected to pulp processing, the battery powder after the pulp is leached in pickling tank,
Leachate obtains filtrate through separation of solid and liquid；
(3) step (2) filtrate is obtained into the liquid that cleans through the process that cleans；
(4) step (3) the removal of impurities liquid is passed through into the content ratio with liquid process adjustment nickel cobalt manganese and obtains conjugate solutions；
(5) conjugate solutions is obtained into NCM vitriols through evaporative crystallization and centrifuge dripping process.
2. the method that waste and old lithium ion battery recovery according to claim 1 makes NCM salt, it is characterised in that step (3)
Described in clean process include remove copper process；The copper removal and secondary copper removal for removing copper process and including carrying out successively；It is described
Copper removal is that iron powder reaction displacement copper removal is added into the filtrate；The secondary copper removal is that the filtrate is reacted with sulphion
Copper sulfide precipitation is generated, reaches copper removal purpose through separation of solid and liquid filter residue.
3. the method that waste and old lithium ion battery recovery according to claim 2 makes NCM salt, it is characterised in that step (3)
Described in removal of impurities process include iron removaling aluminium process；The iron removaling aluminium process is：It is anti-that hydrogen peroxide is added into the removal of impurities liquid after copper removal
Should, for being ferric ion by oxidation of divalent iron ion, heated using steam；Adding dry powder slurry regulation system pH again is
3.0~4.5, for molysite and aluminium salt hydrolysis generation iron hydroxide and aluminum hydroxide precipitation, reach iron removaling through separation of solid and liquid filter residue
Aluminium purpose.
4. the method that the waste and old lithium ion battery recovery according to claim 1-3 any claims makes NCM salt, it is special
Sign is that the process that cleaned described in step (3) includes removing calcium and magnesium lithium process；The removing calcium and magnesium lithium process includes one carried out successively
Secondary removing calcium and magnesium lithium and secondary removing calcium and magnesium lithium；Removing calcium and magnesium lithium is addition HF and MnCO3Reaction, remove solution in calcium, magnesium,
Lithium ion, it is 0.5~1.0 to control reaction pH；The secondary removing calcium and magnesium lithium is to continue to add MnCO3React, be used for into one with HF
Step removes foreign ion in solution, and it is 4.0~5.0 to control reaction pH.
5. the method that waste and old lithium ion battery recovery according to claim 1 makes NCM salt, it is characterised in that step (1)
Described in waste and old lithium ion battery it is just broken before also include discharge process, the discharge process is：Waste and old lithium ion battery immerses
Continue 24~72h in a kind of solution in sodium carbonate liquor or sodium chloride solution.
6. the method that waste and old lithium ion battery recovery makes NCM salt according to claim 1 or 5, it is characterised in that step
(1) pyrolysis is carried out in rotary kiln described in, and pyrolysis temperature is 500~800 DEG C.
7. the method that waste and old lithium ion battery recovery according to claim 1 makes NCM salt, it is characterised in that step (1)
Described in battery powder can carry out pre- removal of impurities processing；The pre- removal of impurities processing uses magnetic separation, removes iron plate, copper sheet in the battery powder
With the one or more in aluminium flake.
8. the method that waste and old lithium ion battery recovery according to claim 1 makes NCM salt, it is characterised in that step (2)
Described in leach be specially：To after the pulp battery powder addition sulfuric acid and hydrogen peroxide reaction, for leach comprising lithium, nickel,
The leachate of cobalt, manganese；Heated using steam, control ph value of reaction completes reaction 1~3.
9. the method that waste and old lithium ion battery recovery according to claim 1 makes NCM salt, it is characterised in that step (4)
Described in liquid process be：The nickel cobalt manganese content of the removal of impurities liquid is detected, nickel cobalt manganese in removal of impurities liquid is adjusted according to testing result
Ratio；According to ternary precursor material proportion requirement, then manganese sulfate, nickel sulfate, cobaltous sulfate are added, nickel cobalt manganese in adjustment removal of impurities liquid
Ratio obtain satisfactory conjugate solutions.
10. the method that waste and old lithium ion battery recovery according to claim 2 makes NCM salt, it is characterised in that described two
Hydrogen sulfide can be added during secondary copper removal in the case of stirring to be used to separate copper sulfide precipitation.
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Cited By (12)
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| CN109364934A (en) * | 2018-10-11 | 2019-02-22 | 陈新忠 | A kind of nickel system selective hydrocatalyst and preparation method |
| CN110391474A (en) * | 2018-04-23 | 2019-10-29 | 中南大学 | A kind of charging method of waste and old lithium ion battery |
| CN110492193A (en) * | 2019-08-09 | 2019-11-22 | 珠海格力电器股份有限公司 | A method of recycling iron, aluminium from waste and old ternary lithium ion battery |
| CN110527836A (en) * | 2019-09-12 | 2019-12-03 | 金川集团股份有限公司 | A kind of method that ion-exchange recycles valuable metal in waste and old nickel cobalt manganese lithium ion battery |
| CN110923453A (en) * | 2019-11-29 | 2020-03-27 | 中南大学 | Method for recovering lithium from waste lithium ion battery |
| CN111304441A (en) * | 2019-11-27 | 2020-06-19 | 湖南邦普循环科技有限公司 | Method for removing impurities from waste battery leachate |
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