CN116902999A - Ternary powder/lithium iron powder/lithium carbonate processing method and waste battery recycling method - Google Patents
Ternary powder/lithium iron powder/lithium carbonate processing method and waste battery recycling method Download PDFInfo
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- CN116902999A CN116902999A CN202310632706.9A CN202310632706A CN116902999A CN 116902999 A CN116902999 A CN 116902999A CN 202310632706 A CN202310632706 A CN 202310632706A CN 116902999 A CN116902999 A CN 116902999A
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- 239000000843 powder Substances 0.000 title claims abstract description 65
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 title claims abstract description 49
- 229910052808 lithium carbonate Inorganic materials 0.000 title claims abstract description 49
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 48
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000003672 processing method Methods 0.000 title claims abstract description 35
- 239000010926 waste battery Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000004064 recycling Methods 0.000 title abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 142
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000012530 fluid Substances 0.000 claims abstract description 30
- 238000002386 leaching Methods 0.000 claims abstract description 30
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 238000005406 washing Methods 0.000 claims abstract description 10
- 238000004537 pulping Methods 0.000 claims abstract description 9
- 238000005507 spraying Methods 0.000 claims description 26
- 238000000967 suction filtration Methods 0.000 claims description 15
- 238000011085 pressure filtration Methods 0.000 claims description 13
- 239000002253 acid Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 7
- 239000000047 product Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 15
- 238000000605 extraction Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 239000002699 waste material Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000007774 positive electrode material Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000010405 anode material Substances 0.000 description 3
- 239000010406 cathode material Substances 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- -1 iron ions Chemical class 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000013043 chemical agent Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- HFCVPDYCRZVZDF-UHFFFAOYSA-N [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O Chemical compound [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O HFCVPDYCRZVZDF-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000002500 ions Chemical group 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- 150000002642 lithium compounds Chemical class 0.000 description 1
- 229910001386 lithium phosphate Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical compound [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 description 1
- 238000002137 ultrasound extraction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/45—Phosphates containing plural metal, or metal and ammonium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/20—Graphite
- C01B32/21—After-treatment
- C01B32/215—Purification; Recovery or purification of graphite formed in iron making, e.g. kish graphite
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D15/00—Lithium compounds
- C01D15/08—Carbonates; Bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/40—Nickelates
- C01G53/42—Nickelates containing alkali metals, e.g. LiNiO2
- C01G53/44—Nickelates containing alkali metals, e.g. LiNiO2 containing manganese
- C01G53/50—Nickelates containing alkali metals, e.g. LiNiO2 containing manganese of the type [MnO2]n-, e.g. Li(NixMn1-x)O2, Li(MyNixMn1-x-y)O2
-
- 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
-
- 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
-
- 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
Abstract
The invention relates to the field of ternary powder tail leaching, iron lithium powder tail leaching and subsequent treatment of lithium carbonate finished products, in particular to a ternary powder/iron lithium powder/lithium carbonate processing method and a waste battery recycling method. The ternary powder/lithium iron powder/lithium carbonate processing method of the invention comprises at least one of the following raw materials: (1) raw materials subjected to ternary powder tail leaching; (2) raw materials after leaching of the tail of the lithium iron powder; (3) raw materials of lithium carbonate finished products; performing pay-for-sale filter pressing on at least one of the raw materials and extracting a finished product; pulping the raw materials subjected to primary filter pressing, and performing at least secondary filter pressing on the pulpified raw materials; and supplying the fluid filtered by the secondary pressure into a water washing tank; the concentration of the fluid in the wash tank is selected to extract the finished product or as bottom water for slurrying the raw material.
Description
Technical Field
The invention relates to the field of ternary powder tail leaching, iron lithium powder tail leaching and subsequent treatment of lithium carbonate finished products, in particular to a ternary powder/iron lithium powder/lithium carbonate processing method and a waste battery recycling method.
Background
Currently, the main current power batteries adopted by electric automobiles in the market are generally divided into two types, namely: ternary lithium battery and lithium iron phosphate battery; the key words of ternary lithium and ferric lithium phosphate mainly refer to chemical elements of positive electrode materials of power batteries. Ternary lithium refers to a lithium battery in which a nickel cobalt lithium manganate (Li (nicoman) O2) ternary positive electrode material is used as the positive electrode material. The material combines the advantages of three materials of lithium cobaltate, lithium nickelate and lithium manganate, forms a three-phase eutectic system of the three materials, and has better comprehensive performance than any single compound due to the ternary synergistic effect. Lithium iron phosphate is a lithium ion battery using lithium iron phosphate as a positive electrode material; the material is characterized by no noble metal elements such as cobalt, low price of raw materials and rich content of resources of phosphorus and iron existing in the earth.
As the new energy industry is more and more mature, on one hand, the requirements on ternary and iron lithium are more and more increased, and on the other hand, the original old waste batteries are more and more increased; in order to meet the production requirement of new batteries and the secondary recycling of waste batteries, so as to save resources, a great part of the ternary and iron lithium used at present is recycled and extracted from the waste batteries. The recovery and extraction process of ternary and iron lithium in waste battery includes stripping the welding spot, insulating sheet and other outer accessories, and stripping the inner constant voltage terminal (i.e. metal button) mechanically or chemically. After stripping, the electrolyte is generally extracted from the ternary battery by vacuum extraction or pyrolysis; for the lithium iron battery, the electrolyte is generally extracted by mechanical crushing, water washing, ultrasonic extraction and other methods. And separating the anode and cathode materials, wherein for the ternary battery, acid washing, pyrolysis and other methods can be adopted to separate the anode and cathode materials; for lithium iron batteries, separation is generally performed by mechanical separation. The finally separated anode and cathode materials can be further recycled.
The ternary lithium material is scarce, and has high water-swelling ship, high price and strong restriction by upstream raw materials along with the rapid development of electric vehicles, thus being a characteristic of the current ternary lithium. Lithium iron phosphate is cheaper than ternary lithium electricity because the rare/noble metal ratio is lower, and is mainly cheap and rich in iron element, so that the lithium iron phosphate is less influenced by upstream raw materials.
Wherein the recovery technical route of the waste batteries is divided into three types of physical, fire and wet methods.
The ternary wet recovery is that after metal is dissolved in solution in ion form, corresponding metal salt is added according to the proportion of nickel, cobalt and manganese elements in the ternary material to be synthesized, alkali is added to precipitate metal coprecipitate, and the obtained precipitate and lithium carbonate are mixed in proportion and sintered to form the regenerated ternary material. Ternary powder tail leaching is a method for extracting lithium ions in ternary materials, and is generally used for recycling rare metals in waste lithium batteries. Specifically, the process comprises the steps of crushing and grinding waste lithium batteries, and then dissolving lithium ions in the leaching solution by using a certain chemical agent. Finally, extracting the lithium compound with higher purity from the leaching solution through a series of steps of reduction, precipitation, filtration, drying and the like. This process enables the recovery of a wide variety of rare metals, including cobalt, nickel, and the like. However, the defects are obvious, and the problems of low lithium content in the leaching solution, large evaporation energy consumption and the like exist.
The tail leaching of the iron lithium powder is a technology for extracting iron ions from waste iron lithium batteries. The specific method is similar to ternary powder tail leaching, namely firstly grinding and crushing waste batteries, then dissolving iron ions in the waste batteries in leaching liquid by using chemical agents such as acid or alkali, and finally extracting iron compounds with higher purity from the leaching liquid through the steps of reduction, precipitation, filtration, drying and the like. However, the method has problems and challenges, such as complex process flow, large amount of energy and chemicals, easy pollution during operation, adverse effect on environment, etc.
Wet recovery of lithium iron phosphate: and dissolving the positive electrode plate by using strong acid, adding alkali to form precipitation of lithium, iron ions and phosphate ions in the solution, separating out the precipitate, and then adjusting according to the recycling proportion, and roasting at high temperature to obtain regenerated lithium iron phosphate.
Lithium carbonate is an important lithium salt material and is widely applied to the industries of batteries, glass manufacturing, metallurgy, ceramics, medicines and the like. But the same existing process is complex.
Disclosure of Invention
The object of the present invention is to solve at least part of the above existing problems with corresponding advantages.
In order to solve the technical problems, the ternary powder/lithium iron powder/lithium carbonate processing method of the invention comprises at least one of the following raw materials:
(1) Raw materials after ternary powder tail leaching;
(2) Raw materials after iron lithium powder tail leaching;
(3) Lithium carbonate finished product raw material;
pumping the feedstock of at least one of the above into one end of a conveyor belt;
a first filter tank, a second filter tank and a third filter tank are arranged below the conveyor belt, and the notch of the first filter tank, the notch of the second filter tank and the notch of the third filter tank are respectively abutted against the lower surface of the conveyor belt;
the raw materials sequentially pass through the surfaces of the first filter tank, the second filter tank and the third filter tank under the drive of the conveyor belt;
wherein the first filter tank and the second filter tank are communicated with an external suction filter component; wherein the third filter tank is connected with an external hot air generating device;
when the raw material passes through the first filter tank, the raw material is subjected to first suction filtration by utilizing the suction filtration component and the first filter tank, and suction filtration fluid is supplied to the first tank; when the raw material passes through the second filter tank, the raw material is subjected to suction filtration by using the suction filtration component and the second filter tank for secondary suction filtration, and meanwhile, the raw material is sprayed, and the suction filtration fluid is supplied to a second tank; heating the raw material by using the hot air generating device and the third filter tank when the raw material passes through the third filter tank;
extracting a finished product from the fluid of the first tank;
and collecting graphite powder in the raw materials at the other end of the conveyor belt.
As a preferred embodiment of the ternary powder/lithium iron powder/lithium carbonate processing method of the present invention, the waste batteries are disassembled and the raw materials are obtained;
adding water into the raw materials to slurry, and adding acid to react;
pumping the raw materials after the completion of the reaction into the conveyor belt.
As a preferred embodiment of the ternary powder/lithium iron powder/lithium carbonate processing method of the present invention, the fluid of the second tank is used as bottom water for the water-adding and material-feeding slurrying.
As a preferred embodiment of the ternary powder/lithium iron powder/lithium carbonate processing method of the invention, hot water is sprayed during spraying.
As a preferred embodiment of the ternary powder/lithium iron powder/lithium carbonate processing method of the present invention, the hot air generating device and the third filter tank supply heat to the raw materials and collect evaporated hot air; and delivering the collected hot vapor to a condensing device and inputting the hot vapor to the second tank.
As a preferred embodiment of the ternary powder/lithium iron powder/lithium carbonate processing method of the invention, it comprises the following two parts or at least one of them:
(1) The spraying angle is vertical downward spraying or inclined angle spraying;
(2) And during spraying, the raw materials are synchronously turned over by the stirring component.
The ternary powder/lithium iron powder/lithium carbonate processing method of the invention comprises at least one of the following raw materials:
(1) Raw materials after ternary powder tail leaching;
(2) Raw materials after iron lithium powder tail leaching;
(3) Lithium carbonate finished product raw material;
performing pay-for-sale filter pressing on at least one of the raw materials and extracting a finished product;
pulping the raw materials subjected to the primary filter pressing, and performing at least secondary filter pressing on the pulpified raw materials; and supplying the fluid filtered by the secondary pressure into a water washing tank;
the concentration of the fluid in the wash tank is selected to extract the finished product or as bottom water for slurrying the raw material.
As a preferred embodiment of the ternary powder/lithium iron powder/lithium carbonate processing method of the present invention, the waste batteries are disassembled and the raw materials are obtained;
adding water into the raw materials to slurry, and adding acid to react;
pumping the raw materials after the completion of the reaction into the conveyor belt.
As a preferred embodiment of the ternary powder/lithium iron powder/lithium carbonate processing method, the raw materials are pulpified again after being subjected to secondary pressure filtration, and are subjected to pressure filtration for at least three times, and the fluid filtered by the tertiary pressure filtration is fed into a water washing tank and is used for pulping before the secondary pressure filtration.
The invention discloses a waste battery recycling method, which at least comprises the ternary powder/iron lithium powder/lithium carbonate processing method.
Advantageous effects
The following advantages, which are obvious on the basis of the technical proposal of the invention from the perspective of the person skilled in the art, are not described in detail, so that the following advantages are not all but only some.
The present invention solves the above existing problems and other existing problems not mentioned one by one above and brings at least the following innovative advantages accordingly:
1. according to the ternary powder/lithium iron powder/lithium carbonate processing method and the waste battery recycling method, raw materials after ternary powder tail leaching or raw materials after lithium iron powder tail leaching or lithium carbonate finished product raw materials are put into a conveyor belt and subjected to primary suction of a first filter tank, secondary suction filtration and spraying of a second filter tank and heat supply of a third filter tank on the conveyor belt, so that press filtration of the raw materials is finished, the raw material extraction efficiency is improved, meanwhile, the raw materials are dried, and the raw material extraction rate is high due to the combination of the steps; and the bagging, packing and transporting efficiency of the solid raw materials is high, and the labor cost is low.
2. The invention relates to a ternary powder/lithium iron powder/lithium carbonate processing method and a waste battery recycling method, wherein fluid in a second tank is used as bottom water for adding water, feeding and pulping. Not only saves the extra water supply amount of the prior raw material pulping, but also indirectly saves the treatment amount of the subsequent procedures; and simultaneously, the fluid with low concentration is continuously used, so that waste is avoided.
3. According to the ternary powder/lithium iron powder/lithium carbonate processing method and the waste battery recycling method, the hot air generating device and the third filter tank supply heat to the raw materials, and evaporated hot air is collected; and the collected hot steam is conveyed to the condensing device and is input to the second tank, so that on one hand, the drying of the raw materials is improved, and on the other hand, the water in the raw materials is collected and is input into the second tank for continuous use, and the utilization rate is further improved.
4. According to the ternary powder/lithium iron powder/lithium carbonate processing method and the waste battery recycling method, spraying angles are vertical downward spraying or inclined spraying; so that the raw material can be sprayed more fully.
5. According to the ternary powder/lithium iron powder/lithium carbonate processing method and the waste battery recycling method, the raw materials are synchronously turned through the stirring component during spraying, so that the raw materials are turned in the spraying process, and the degree of the sprayed raw materials can be further improved. And after the stirring part turns over the raw materials, the raw materials can be kept to be uniform in thickness on the surface of the conveyor belt by spraying.
6. The invention relates to a ternary powder/lithium iron powder/lithium carbonate processing method and a waste battery recycling method, which are characterized in that at least one of the above raw materials is subjected to first-pass filter pressing and finished products are extracted; pulping the raw materials subjected to the primary filter pressing, and performing at least secondary filter pressing on the pulpified raw materials; and supplying the fluid filtered by the secondary pressure into a water washing tank; the water tank is used for extracting a finished product or is used as bottom water according to the concentration of the fluid in the water tank, and the bottom water is used for slurrying the raw materials, so that the effects of high extraction efficiency and water conservation are achieved.
Drawings
FIG. 1 is a flow chart of the present invention;
fig. 2 is a modified flow chart of the area "a" in fig. 1.
In the figure: 1. the device comprises a spraying component, a suction component, a fan cover, a condensing device, a stirring component, a material homogenizing plate, a material discharging opening, a collecting bucket, a conveyor belt, a conveying roller, a filter screen, a first filter tank, a second filter tank, a third filter tank, a first tank, a second tank and a water washing tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the technical solutions of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the specific embodiments of the present disclosure.
Like reference numerals in the drawings denote like parts. It should be noted that the described embodiments are some, but not all embodiments of the present disclosure.
All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.
Example 1
The ternary powder/lithium iron powder/lithium carbonate processing method of the invention comprises at least one of the following raw materials:
(1) Raw materials after ternary powder tail leaching;
(2) Raw materials after iron lithium powder tail leaching;
(3) Lithium carbonate finished product raw material;
it should be noted that the invention is only used for ternary powder and/or iron lithium powder and/or lithium carbonate finished products after tail leaching is completed;
referring to fig. 1, at least one of the above three materials is pumped or put into one end of the conveyor belt 9; the conveyor belt
As shown in fig. 1, a first filter tank 12, a second filter tank 13 and a third filter tank 14 are arranged below the conveyor belt 9, and the notches of the first filter tank 12, the second filter tank 13 and the third filter tank 14 are respectively abutted against the lower surface of the conveyor belt 9; the raw materials sequentially pass through the surfaces of the first filter tank 12, the second filter tank 13 and the third filter tank 14 under the drive of the conveyor belt 9;
wherein the first filter tank 12 and the second filter tank 13 are communicated with an external suction filter component; wherein the third filter tank 14 is connected with an external hot air generating device; the suction filter component and the hot air generating device are not drawn in the drawings, but the person skilled in the art should understand that the suction filter component is a negative pressure suction device, and the hot air generating device is the existing hot air blowing device, such as a hot air blower and the like; the hot air generating device is directly or indirectly communicated with the first filter tank 12 and the second filter tank 13 through a pipeline; the wind generating device is also directly or indirectly connected to the third filter tank 14 through a pipeline.
As shown in fig. 1, the conveyor belt 9 is provided with a conveyor roller 10 at least at the turning point, and the conveyor belt 9 is preferably in a grid structure, and a filter screen 11 is further arranged on the surface of the conveyor belt, and when the raw material is pumped or poured into the conveyor belt 9, the raw material is subjected to solid-liquid separation, and most of the liquid flows into a first filter tank 12; and the raw material is first suction-filtered by the suction filter means and the first filter tank 12 while passing through the first filter tank 12, and the suction-filtered fluid is supplied to the first tank 15. The raw material is suction-filtered twice by means of the suction filter element and the second filter tank 13 as it passes the second filter tank 13, while the raw material is sprayed and the suction-filtered fluid is fed into the second tank 16 such that only solid raw material remains on top of the conveyor belt 9. Heating the raw material by using the hot air generating device and the third filter tank 14 when the raw material passes through the third filter tank 14, so that the solid raw material is dried on one side to form dry graphite powder; on the other hand, the liquid of the raw material is extracted by the wind-carrying generating device.
See above, as shown in fig. 1, wherein the fluid of the first tank 15 is subjected to extraction of the finished product; i.e. extracting the metals from the liquid and purifying;
referring to fig. 1, wherein the raw material is placed on the left side of the conveyor belt 9 in the drawing, after passing the surfaces of the first filter tank 12, the second filter tank 13 and the third filter tank 14, the raw material is transferred to the right side of the conveyor belt 9, the right side of the conveyor belt 9 is the feed opening 7, where the collecting vessel 8 is provided; so that the solid raw graphite powder in the raw material is collected at the other end of the conveyor belt 9.
Wherein the first tank 15 and the second tank 16 are preferably mother liquor storage tanks.
As shown in fig. 1, wherein the raw materials described above refer to the disassembly of waste batteries and the acquisition of the raw materials; the waste power batteries are crushed, sieved, magnetically separated and the like to produce raw materials; adding water into the raw materials to slurry, and adding acid to react; finally, the raw materials after the completion of the reaction are pumped into the conveyor belt 9.
As shown in fig. 1, wherein the fluid (liquid/water) in the second tank 16 described hereinabove is additionally useful, based on the description hereinabove: the raw material is suction-filtered twice by the suction-filtering means and the second filter tank 13 while passing through the second filter tank 13, while spraying the raw material, and the suction-filtered fluid is supplied to the second tank 16. Since the spraying is performed to further separate and flow the metal components in the raw material into the second tank 16 and the spraying is performed to reduce the concentration thereof, it is preferable to use the fluid of the second tank 16 as the bottom water for the water-adding slurry.
Further, hot water is sprayed during spraying.
Further, referring to fig. 2, when the hot air generating means and the third filter tank 14 supply heat to the raw materials and collect the evaporated hot air; and the collected hot vapor is sent to the condensing unit 4 and is input to the second tank 16.
Wherein fig. 2 shows that an air extraction member 2 is arranged above the conveyor belt 9 (third filter tank 14), said air extraction member 2 having a hood 3, the hood 3 being capable of covering at least the cross-sectional width of the third filter tank 14; so that the hot air generating means promotes the evaporation of the raw material above the conveyor belt 9 by the heat supplied into the third filter tank 14, and sucks and transfers the evaporated hot air into the condensing means 4, converts the hot air into a liquid and transfers it to the second tank 16.
Example 2
The ternary powder/lithium iron powder/lithium carbonate processing method of this example 2, including all the features of example 1, fig. 1 shows that the hot water spray is a vertical downward spray, and the difference in this example 2 is that:
1. referring to fig. 2, the conveyor belt 9 is provided with a stirring member 5 at a position above the second filter tank 13 so that the raw materials are simultaneously turned over by the stirring member 5 during spraying. As a matter of common knowledge of a person skilled in the art, the stirring part 5 is a stirring blade driven by a motor to rotate, so that the raw materials are turned in the spraying process, and the raw materials can be more fully sprayed. The stirred raw material has a problem of uneven thickness on the conveyor belt 9, and at this time, the raw material can be made uniform on the conveyor belt 9 by spraying.
2. Referring to fig. 2, the spraying is kept at an inclined angle to spray hot water, so that the raw materials are turned under the impact of the sprayed water, and the raw materials can be more fully sprayed.
Further, a material equalizing plate 6 is arranged above the conveyor belt 9 and at the position of the first filter tank 12, so that the raw material fed into the surface of the conveyor belt 9 can keep uniform thickness under the action of the material equalizing plate 6. And the thickness of the raw material on the surface of the conveying belt 9 can be indirectly adjusted by adjusting the distance between the material equalizing plate 6 and the conveying belt 9.
Example 3
The ternary powder/lithium iron powder/lithium carbonate processing method of the invention comprises at least one of the following raw materials:
(1) Raw materials after ternary powder tail leaching;
(2) Raw materials after iron lithium powder tail leaching;
(3) Lithium carbonate finished product raw material;
performing pay-for-sale filter pressing on at least one of the raw materials and extracting a finished product;
it should be noted that the invention is only used for ternary powder and/or iron lithium powder and/or lithium carbonate finished products after tail leaching is completed;
referring to fig. 1, the raw material subjected to the primary pressure filtration is pulped, and the pulped raw material is subjected to at least secondary pressure filtration; and supplying the secondarily filtered fluid to the wash tank 17;
depending on the concentration of the fluid in the wash tank 17, either for extraction of the finished product or as bottom water for slurrying of the raw material.
Further, the raw materials are obtained by disassembling waste batteries;
adding water into the raw materials to slurry, and adding acid to react;
the raw materials after completion of the reaction are pumped into the conveyor belt 9.
Further, the raw materials are pulped again after being subjected to secondary pressure filtration, and are subjected to pressure filtration for at least three times, and the fluid filtered by the three times is fed into a washing water tank 17 and is used for pulping before the secondary pressure filtration. Also shown in figure 1 is that there may be four press presses, where the fluid from the four presses may be fed to the wash tank 17 and used for slurrying before the three press presses.
Example 4
The waste battery recycling method of the invention comprises partial or all embodiments of the previous examples 1 to 3, and waste battery recycling is realized by using the embodiments of the previous examples 1 to 3.
The terms first, second and the like in the description and in the claims, are not used for any order, quantity or importance, but are used for distinguishing between different elements. Likewise, the terms "a," "an," or "the" and similar terms do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
The preferred embodiments of the present invention described above are not intended to limit the present invention, and the scope of the present invention is defined by the appended claims, and other embodiments can be obtained from the drawings without inventive faculty to those skilled in the art, and any modifications based on the claims of the present invention are also the scope of the present invention.
Claims (10)
1. The ternary powder/lithium iron powder/lithium carbonate processing method is characterized by comprising the following raw materials:
(1) Raw materials after ternary powder tail leaching;
(2) Raw materials after iron lithium powder tail leaching;
(3) Lithium carbonate finished product raw material;
pumping the feedstock of at least one of the above into one end of a conveyor belt;
a first filter tank, a second filter tank and a third filter tank are arranged below the conveyor belt, and the notch of the first filter tank, the notch of the second filter tank and the notch of the third filter tank are respectively abutted against the lower surface of the conveyor belt;
the raw materials sequentially pass through the surfaces of the first filter tank, the second filter tank and the third filter tank under the drive of the conveyor belt;
wherein the first filter tank and the second filter tank are communicated with an external suction filter component; wherein the third filter tank is connected with an external hot air generating device;
when the raw material passes through the first filter tank, the raw material is subjected to first suction filtration by utilizing the suction filtration component and the first filter tank, and suction filtration fluid is supplied to the first tank; when the raw material passes through the second filter tank, the raw material is subjected to suction filtration by using the suction filtration component and the second filter tank for secondary suction filtration, and meanwhile, the raw material is sprayed, and the suction filtration fluid is supplied to a second tank; heating the raw material by using the hot air generating device and the third filter tank when the raw material passes through the third filter tank;
extracting a finished product from the fluid of the first tank;
and collecting graphite powder in the raw materials at the other end of the conveyor belt.
2. The ternary powder/lithium iron powder/lithium carbonate processing method according to claim 1, wherein the waste batteries are disassembled and the raw materials are obtained;
adding water into the raw materials to slurry, and adding acid to react;
pumping the raw materials after the completion of the reaction into the conveyor belt.
3. The ternary powder/lithium iron powder/lithium carbonate processing method of claim 2, wherein the fluid of the second tank is used as bottom water for the water-adding and material-feeding slurrying.
4. A ternary powder/lithium iron powder/lithium carbonate processing method according to claim 1, 2 or 3, wherein hot water is sprayed during spraying.
5. The ternary powder/lithium iron powder/lithium carbonate processing method according to claim 1, 2 or 3, wherein the hot air generating device and the third filter tank supply heat to the raw materials and collect evaporated hot air; and delivering the collected hot vapor to a condensing device and inputting the hot vapor to the second tank.
6. The ternary powder/lithium iron powder/lithium carbonate processing method of claim 1, comprising at least one or two of the following:
(1) The spraying angle is vertical downward spraying or inclined angle spraying;
(2) And during spraying, the raw materials are synchronously turned over by the stirring component.
7. The ternary powder/lithium iron powder/lithium carbonate processing method is characterized by comprising the following raw materials:
(1) Raw materials after ternary powder tail leaching;
(2) Raw materials after iron lithium powder tail leaching;
(3) Lithium carbonate finished product raw material;
performing pay-for-sale filter pressing on at least one of the raw materials and extracting a finished product;
pulping the raw materials subjected to primary filter pressing, and performing at least secondary filter pressing on the pulpified raw materials; and supplying the fluid filtered by the secondary pressure into a water washing tank;
the concentration of the fluid in the wash tank is selected to extract the finished product or as bottom water for slurrying the raw material.
8. The ternary powder/lithium iron powder/lithium carbonate processing method according to claim 7, wherein the waste batteries are disassembled and the raw materials are obtained;
adding water into the raw materials to slurry, and adding acid to react;
pumping the raw materials after the completion of the reaction into a conveyor belt.
9. The ternary powder/lithium iron powder/lithium carbonate processing method according to claim 7, wherein the raw materials are pulpified again after being subjected to secondary pressure filtration, and at least three times of pressure filtration are performed, and the fluid filtered out by the three times of pressure filtration is fed into a water washing tank and used for pulping before the secondary pressure filtration.
10. Waste battery recovery method, characterized in that it at least comprises a ternary powder/lithium iron powder/lithium carbonate processing method according to any one of claims 1 to 6 and/or a ternary powder/lithium iron powder/lithium carbonate processing method according to any one of claims 7 to 9.
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