CN109234546A - Continuous leaching system and leaching process for waste lithium battery anode powder - Google Patents
Continuous leaching system and leaching process for waste lithium battery anode powder Download PDFInfo
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- CN109234546A CN109234546A CN201811081025.3A CN201811081025A CN109234546A CN 109234546 A CN109234546 A CN 109234546A CN 201811081025 A CN201811081025 A CN 201811081025A CN 109234546 A CN109234546 A CN 109234546A
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- reaction kettle
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- 239000002699 waste material Substances 0.000 title claims abstract description 38
- 238000002386 leaching Methods 0.000 title claims abstract description 33
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 26
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000000843 powder Substances 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 78
- 239000007788 liquid Substances 0.000 claims abstract description 77
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 34
- 235000021110 pickles Nutrition 0.000 claims abstract description 23
- 238000003860 storage Methods 0.000 claims abstract description 21
- 239000002253 acid Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 17
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 16
- 238000005516 engineering process Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 239000005864 Sulphur Substances 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/10—Obtaining alkali metals
- C22B26/12—Obtaining lithium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
-
- 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
-
- 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
- Y02W30/84—Recycling of batteries or fuel cells
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a continuous leaching system for waste lithium battery anode powder, which comprises a first reaction kettle, a second reaction kettle, a stirring tank, a first continuous solid-liquid separator, a second continuous solid-liquid separator, a third continuous solid-liquid separator, an acid leaching liquid storage tank and a waste residue storage tank, wherein the first reaction kettle is connected with the second reaction kettle; the first reaction kettle is communicated with the first continuous solid-liquid separator through a first pipeline; the second reaction kettle is communicated with a second continuous solid-liquid separator through a second pipeline; the stirring tank is communicated with the third continuous solid-liquid separator through a third pipeline; the first continuous solid-liquid separator is communicated with the pickle liquor storage tank through a fourth pipeline and is communicated with the second reaction kettle through a fifth pipeline; the second continuous solid-liquid separator is communicated with the first reaction kettle through a sixth pipeline and communicated with the stirring tank through a seventh pipeline; the third continuous solid-liquid separator is communicated with the second reaction kettle through an eighth pipeline and is communicated with the waste residue storage tank through a ninth pipeline. The invention has high leaching rate and solves the problem of excessive use of sulfuric acid.
Description
Technical field
The present invention relates to waste lithium cell recovery technology fields more particularly to a kind of waste lithium cell positive mix continuously to soak
Take system and leaching technology.
Background technique
With new energy Industry Quick Development, the application range and market scale of lithium ion battery rise year by year.With lithium
Increasingly rare, the price rapid growth of the lithium nickel cobalt salt of battery raw material of the natural resources such as nickel cobalt.Therefore, it is based on applying waste lithium ionic
The lithium nickel cobalt resource market that battery recycling obtains can be increasing.
In the current country, the positive mix treatment process in waste lithium cell is mainly based on hydrometallurgic recovery technology.Wet
In method technique, in order to obtain the valuable elements such as the nickel cobalt lithium in positive mix as far as possible, need with excessive sulfuric acid and hydrogen peroxide etc.
Powder is leached.But simultaneously, the techniques such as later separation, removal of impurities, purification need to be adjusted pH value of solution again, therefore,
Excessive sulfuric acid can consume a large amount of sodium hydroxide, while a large amount of sodium sulphate can be also introduced into system, and product purity is caused to drop
Low, this just forms contradiction with the purpose of battery recycling, and domestic existing technology not can solve this problem at present.It is same with this
When, in existing hydrometallurgic recovery technology, leaching technology is intermittent leaching, and this technique transfer storage facilities are more, and occupy
Certain operator, limits utilization rate of equipment and installations to a certain extent, reduces production efficiency.
Summary of the invention
Based on technical problem present in background technique, the invention proposes a kind of waste lithium cell positive mixs continuously to soak
Take system and leaching technology.
A kind of waste lithium cell positive mix subsequent leaching system proposed by the present invention, including the first reaction kettle, second are instead
Answer kettle, agitator tank, the first continous way solid-liquid separator, the second continous way solid-liquid separator, third continous way solid-liquid separator, acid
Immersion liquid storage tank and waste residue reserve tank；
First reaction kettle is connected to by first pipe with the first continous way solid-liquid separator；Second reaction kettle passes through the second pipe
Road is connected to the second continous way solid-liquid separator；Agitator tank is connected to by third pipeline with third continous way solid-liquid separator；The
One continous way solid-liquid separator is connected to pickle liquor storage tank by the 4th pipeline and passes through the 5th pipeline and is connected to the second reaction kettle；
Second continous way solid-liquid separator is connected to the first reaction kettle by the 6th pipeline and passes through the 7th pipeline and is connected to agitator tank；The
Three continous way solid-liquid separators are connected to the second reaction kettle by the 8th pipeline and pass through the 9th pipeline and are connected to waste residue reserve tank.
A kind of waste lithium cell positive mix subsequent leaching technique that the present invention also proposes, comprising the following steps:
S1, cleaning solution is measured in investment agitator tank；
S2, when entering in the first reaction kettle wait wash liquid stream, lithium battery anode powder metering is put into the first reaction kettle,
In: the first reaction kettle keeps continuous constant temperature stirring, residence time of material 80-150min；
S3, reaction paste in the first reaction kettle is delivered in the first continous way solid-liquid separator through first pipe, through
The separating obtained pickle liquor of one continous way solid-liquid separator is through the 4th pipeline to pickle liquor storage tank, separating obtained solid warp
5th pipeline to the second continuous reaction kettle；
S4, will sulfuric acid or sulfuric acid, in hydrogen peroxide metering the second reaction kettle of investment, in which: the second reaction kettle keeps constantly permanent
Temperature stirring, residence time of material 80-150min；
S5, reaction paste in the second reaction kettle is delivered in the second continous way solid-liquid separator through second pipe, through
The separating obtained liquid of two continous way solid-liquid separators is through the 6th pipeline to pickle liquor storage tank, separating obtained acid leaching residue warp
7th pipeline is to agitator tank；
S6, agitator tank holding are stirred continuously, residence time of material 5-30min；
S7, by slurry in agitator tank through in third pipeline to third continous way solid-liquid separator, through third continous way
For the separating obtained liquid of solid-liquid separator through the 8th pipeline to the second reaction kettle, separating obtained waste residue is defeated through the 9th pipeline
It send to waste residue reserve tank.
Preferably, in S1, cleaning solution is clean water, is measured by volume, and every 1kg positive mix puts into 6-10L clean water.
Preferably, in S2, the first reaction kettle maintaining reaction temperature is 65-90 DEG C.
Preferably, in S4, sulfuric acid is 98% concentrated sulfuric acid, is measured by volume, for every 1kg iron phosphate lithium positive pole powder
Material investment 0.5-1L sulfuric acid, puts into 0.8-2L sulfuric acid for every 1kg tertiary cathode powder.
Preferably, in S4, the effective mass score of hydrogen peroxide is greater than 25%, is measured by volume, every 1kg ternary is just
Pole powder puts into 1.5-3L hydrogen peroxide.
Preferably, in S4, the second reaction kettle maintaining reaction temperature is 65-90 DEG C.
A kind of waste lithium cell positive mix subsequent leaching technique proposed by the present invention, obtained pickle liquor pH is in 0.5-
Between 1.5, Li+ concentration is in 3-10gL in the pickle liquor that wherein LiFePO4 material leaches-1, ternary material leaches to obtain
Pickle liquor in Ni, Co, Mn mass concentration and in 40-90gL-1；Valuable mass of ion score in obtained acid leaching residue and
Less than 0.5%, moisture content 15-45%.The present invention solves sulfuric acid while keeping high extraction rate by subsequent leaching
The excessive problem of dosage, while reducing the equipment of transfer storage, improve production efficiency.
Detailed description of the invention
Fig. 1 is a kind of flow chart of waste lithium cell positive mix subsequent leaching technique proposed by the present invention.
Specific embodiment
Referring to Fig.1, the present invention proposes a kind of waste lithium cell positive mix subsequent leaching system, including the first reaction kettle 1,
Second reaction kettle 2, agitator tank 3, the first continous way solid-liquid separator 4, the second continous way solid-liquid separator 5, third continous way are solid
Liquid/gas separator 6, pickle liquor storage tank 7 and waste residue reserve tank 8；
First reaction kettle 1 is connected to by first pipe with the first continous way solid-liquid separator 4；Second reaction kettle 2 passes through the
Two pipelines are connected to the second continous way solid-liquid separator 5；Agitator tank 3 passes through third pipeline and third continous way solid-liquid separator 6
Connection；First continous way solid-liquid separator 4 is connected to pickle liquor storage tank 7 by the 4th pipeline and passes through the 5th pipeline and second instead
Kettle 2 is answered to be connected to；Second continous way solid-liquid separator 5 be connected to by the 6th pipeline with the first reaction kettle 1 and is passed through the 7th pipeline and
Agitator tank 3 is connected to；Third continous way solid-liquid separator 6 is connected to the second reaction kettle 2 by the 8th pipeline and by the 9th pipeline
It is connected to waste residue reserve tank 8.
Embodiment one
A kind of waste lithium cell positive mix subsequent leaching technique proposed by the present invention, comprising the following steps:
S1, by clean water with 80Lh-1Flow enter in agitator tank 3；
S2, when clean water is begun to flow into the first reaction kettle 1, by the lithium iron phosphate battery anode powder through Overheating Treatment
With 10kgh-1Speed be transferred into the first reaction kettle 1, in which: the first reaction kettle 1 holding be stirred continuously, temperature maintains
85 DEG C, residence time of material 80-150min；
S3, reaction paste in the first reaction kettle 1 is delivered in the first continous way solid-liquid separator 4 through first pipe, is passed through
Through the 4th pipeline to pickle liquor storage tank 7, separating obtained consolidates the separating obtained pickle liquor of first continous way solid-liquid separator 4
Body is through the 5th pipeline to the second continuous reaction kettle；
S4, by 98% sulfuric acid with 5Lh-1Flow enter the second reaction kettle 2 in, in which: the second reaction kettle 2 keeps continuous
Stirring, maintaining temperature is 85 DEG C, residence time of material 80-150min；
S5, reaction paste in the second reaction kettle 2 is delivered in the second continous way solid-liquid separator 5 through second pipe, is passed through
The separating obtained liquid of second continous way solid-liquid separator 5 is through the 6th pipeline to pickle liquor storage tank 7, separating obtained acidleach
Slag is through the 7th pipeline to agitator tank 3；
S6, the holding of agitator tank 3 are stirred continuously, residence time of material 5-30min；
S7, by slurry in agitator tank 3 through in third pipeline to third continous way solid-liquid separator 6, it is continuous through third
The separating obtained liquid of formula solid-liquid separator 6 is through the 8th pipeline to the second reaction kettle 2, and separating obtained waste residue is through the 9th pipe
Road is delivered to waste residue reserve tank 8.
In the present embodiment, after continuously investment material and after starting to slag tap, the first continous way solid-liquid separator 4 of detection
To pickle liquor in, Li+Mass concentration is 6.3gL-1；In the acid leaching residue that third continous way solid-liquid separator 6 obtains, Li mass
Score is 0.1%, moisture content 32%.
Embodiment two
A kind of waste lithium cell positive mix subsequent leaching technique proposed by the present invention, comprising the following steps:
S1, by clean water with Lh-1Flow enter in agitator tank 3；
S2, when clean water is begun to flow into the first reaction kettle 1, by the 622 ternary anode powders through Overheating Treatment
With 5kgh-1Speed be transferred into the first reaction kettle 1, in which: the first reaction kettle 1 holding be stirred continuously, temperature maintains
85 DEG C, residence time of material 80-150min；
S3, reaction paste in the first reaction kettle 1 is delivered in the first continous way solid-liquid separator 4 through first pipe, is passed through
Through the 4th pipeline to pickle liquor storage tank 7, separating obtained consolidates the separating obtained pickle liquor of first continous way solid-liquid separator 4
Body is through the 5th pipeline to the second continuous reaction kettle；
S4,98% sulfuric acid, 27% hydrogen peroxide will be taken respectively with 7Lh-1、12L·h-1Flow enter the second reaction kettle 2
It is interior, in which: the holding of the second reaction kettle 2 is stirred continuously, and maintaining temperature is 85 DEG C, residence time of material 80-150min；
S5, reaction paste in the second reaction kettle 2 is delivered in the second continous way solid-liquid separator 5 through second pipe, is passed through
The separating obtained liquid of second continous way solid-liquid separator 5 is through the 6th pipeline to pickle liquor storage tank 7, separating obtained acidleach
Slag is through the 7th pipeline to agitator tank 3；
S6, the holding of agitator tank 3 are stirred continuously, residence time of material 5-30min；
S7, by slurry in agitator tank 3 through in third pipeline to third continous way solid-liquid separator 6, it is continuous through third
The separating obtained liquid of formula solid-liquid separator 6 is through the 8th pipeline to the second reaction kettle 2, and separating obtained waste residue is through the 9th pipe
Road is delivered to waste residue reserve tank 8.
In the present embodiment, after continuously investment material and after starting to slag tap, the first continous way solid-liquid separator 4 of detection is obtained
Pickle liquor in mass of ion concentration, Li+、Ni2+、Co2+、Mn2+It is respectively 8.2,37.0,11.9,11.5gL-1；Third
In the acid leaching residue that continous way solid-liquid separator 6 obtains the mass fraction of Li, Ni, Co, Mn and be 0.2%, moisture content 40%.
The present invention solves the problems, such as that sulfuric acid dosage is excessive, simultaneously while keeping high extraction rate by subsequent leaching
The equipment for reducing transfer storage, improves production efficiency.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of waste lithium cell positive mix subsequent leaching system, which is characterized in that instead including the first reaction kettle (1), second
Answer kettle (2), agitator tank (3), the first continous way solid-liquid separator (4), the second continous way solid-liquid separator (5), third continous way
Solid-liquid separator (6), pickle liquor storage tank (7) and waste residue reserve tank (8)；
First reaction kettle (1) is connected to by first pipe with the first continous way solid-liquid separator (4)；Second reaction kettle (2) passes through
Second pipe is connected to the second continous way solid-liquid separator (5)；Agitator tank (3) passes through third pipeline and third continous way solid-liquid point
It is connected to from device (6)；First continous way solid-liquid separator (4) is connected to pickle liquor storage tank (7) by the 4th pipeline and by the 5
Pipeline is connected to the second reaction kettle (2)；Second continous way solid-liquid separator (5) is connected by the 6th pipeline and the first reaction kettle (1)
Lead to and pass through the 7th pipeline and is connected to agitator tank (3)；Third continous way solid-liquid separator (6) is reacted by the 8th pipeline with second
Kettle (2) is connected to and is connected to by the 9th pipeline with waste residue reserve tank (8).
2. a kind of leaching technology of waste lithium cell positive mix subsequent leaching system as described in claim 1, feature exist
In, comprising the following steps:
S1, cleaning solution is measured in investment agitator tank (3)；
S2, wait wash liquid stream enter the first reaction kettle (1) it is interior when, by lithium battery anode powder metering investment the first reaction kettle (1) in,
Wherein: the first reaction kettle (1) keeps continuous constant temperature stirring, residence time of material 80-150min；
S3, reaction paste in the first reaction kettle (1) is delivered in the first continous way solid-liquid separator (4) through first pipe, warp
The separating obtained pickle liquor of first continous way solid-liquid separator (4) through the 4th pipeline to pickle liquor storage tank (7), it is separating obtained
Solid through the 5th pipeline to the second continuous reaction kettle；
S4, will sulfuric acid or sulfuric acid, in hydrogen peroxide metering investment the second reaction kettle (2), in which: the second reaction kettle (2) keeps continuous
Constant temperature stirring, residence time of material 80-150min；
S5, reaction paste in the second reaction kettle (2) is delivered in the second continous way solid-liquid separator (5) through second pipe, warp
The separating obtained liquid of second continous way solid-liquid separator (5) through the 6th pipeline to pickle liquor storage tank (7), it is separating obtained
Acid leaching residue is through the 7th pipeline to agitator tank (3)；
S6, agitator tank (3) holding are stirred continuously, residence time of material 5-30min；
S7, by slurry in agitator tank (3) through third pipeline in third continous way solid-liquid separator (6), it is continuous through third
The separating obtained liquid of formula solid-liquid separator (6) is through the 8th pipeline to the second reaction kettle (2), and separating obtained waste residue is through
Nine pipelines are to waste residue reserve tank (8).
3. waste lithium cell positive mix subsequent leaching technique according to claim 2, which is characterized in that in S1, wash
Washing liquid is clean water, is measured by volume, and every 1kg positive mix puts into 6-10L clean water.
4. waste lithium cell positive mix subsequent leaching technique according to claim 2, which is characterized in that in S2, the
One reaction kettle (1) maintaining reaction temperature is 65-90 DEG C.
5. the waste lithium cell positive mix subsequent leaching technique according to any one of claim 2-4, which is characterized in that
In S4, sulfuric acid is 98% concentrated sulfuric acid, is measured by volume, puts into 0.5-1L sulphur for every 1kg iron phosphate lithium positive pole powder
Acid puts into 0.8-2L sulfuric acid for every 1kg tertiary cathode powder.
6. the waste lithium cell positive mix subsequent leaching technique according to any one of claim 2-4, which is characterized in that
In S4, the effective mass score of hydrogen peroxide is greater than 25%, is measured by volume, and every 1kg tertiary cathode powder puts into 1.5-
3L hydrogen peroxide.
7. the waste lithium cell positive mix subsequent leaching technique according to any one of claim 2-4, which is characterized in that
In S4, the second reaction kettle (2) maintaining reaction temperature is 65-90 DEG C.
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| CN201811081025.3A CN109234546A (en) | 2018-09-17 | 2018-09-17 | Continuous leaching system and leaching process for waste lithium battery anode powder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110724832A (en) * | 2019-09-29 | 2020-01-24 | 天津科技大学 | Continuous ion pump lithium extraction device and lithium extraction method thereof |
| CN112028045A (en) * | 2020-09-07 | 2020-12-04 | 厦门厦钨新能源材料股份有限公司 | Conductive lithium iron phosphate and preparation method and application thereof |
| CN112063841A (en) * | 2020-07-31 | 2020-12-11 | 荆门市格林美新材料有限公司 | Intelligent continuous leaching system and method for waste lithium ion batteries |
| CN112151903A (en) * | 2020-11-26 | 2020-12-29 | 清华四川能源互联网研究院 | Impurity removal and treatment method in lithium battery scrapped positive electrode material recovery process |
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