CN215277357U - A purification device for lithium carbonate is retrieved to lithium iron phosphate battery - Google Patents
A purification device for lithium carbonate is retrieved to lithium iron phosphate battery Download PDFInfo
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- CN215277357U CN215277357U CN202122108976.9U CN202122108976U CN215277357U CN 215277357 U CN215277357 U CN 215277357U CN 202122108976 U CN202122108976 U CN 202122108976U CN 215277357 U CN215277357 U CN 215277357U
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W30/84—Recycling of batteries or fuel cells
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Abstract
The utility model discloses a purification device for lithium iron phosphate battery retrieves lithium carbonate, include: the reaction kettle is internally provided with a stirring device and an electric demagnetizing device arranged on the upper inner wall of the reaction kettle, and a material outlet at the bottom of the reaction kettle is connected with a separating device. And fully stirring the low-purity lithium carbonate and a certain proportion of water in the reaction kettle by a stirring device. The doped iron element in lithium carbonate is distinguished from lithium carbonate. And electrifying the electric demagnetizing device, adsorbing magnetic substances such as iron in the reaction kettle, and then respectively conveying the lithium carbonate and the adsorbed iron out through the separating device. The iron impurities in the conveyed lithium carbonate slurry are removed, so that the purity of the lithium carbonate obtained after drying is improved.
Description
Technical Field
The utility model relates to a lithium carbonate purification technical field, concretely relates to a purification device for lithium iron phosphate battery retrieves lithium carbonate.
Background
With the rapid development of the electric automobile industry, the demand for lithium iron phosphate batteries is also rapidly increased, and a large number of lithium iron phosphate batteries therewith begin to enter a scrapping stage. Abandonment lithium iron phosphate battery on the one hand can cause environmental pollution, and there is huge economic value in the recovery of on the other hand lithium iron phosphate battery, consequently not only can the environmental protection to the recovery of lithium iron phosphate battery, can avoid the wasting of resources again.
In the traditional technology, the lithium iron phosphate battery is recycled mainly to obtain lithium rich in the lithium iron phosphate battery, and the lithium is made into crude lithium carbonate during the recycling of lithium resources. However, because the components of the lithium iron phosphate battery are complex, the prepared crude lithium carbonate has poor quality and low whiteness, the main content is less than 90 percent, and the content of the simple substance iron is as high as 4 to 6 percent. Therefore, the product cannot be directly used, and can be normally used only through a series of steps of acid dissolution, filtration, purification, evaporation, lithium precipitation, centrifugation and the like. The process has long working procedures, more related equipment and high consumption cost.
Therefore, how to improve the purity of the crude lithium carbonate when the lithium iron phosphate battery is recovered and refined is a technical problem to be solved urgently in the field.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned technical problem, proposed following technical scheme:
in a first aspect, an embodiment of the present invention provides a purification device for lithium iron phosphate battery to recover lithium carbonate, include: the reaction kettle is internally provided with a stirring device and an electric demagnetizing device arranged on the upper inner wall of the reaction kettle, and a material outlet at the bottom of the reaction kettle is connected with a separating device.
By adopting the implementation mode, the lithium carbonate with low purity and the water with a certain proportion are fully stirred in the reaction kettle through the stirring device. The doped iron element in lithium carbonate is distinguished from lithium carbonate. And electrifying the electric demagnetizing device, adsorbing magnetic substances such as iron in the reaction kettle, and then respectively conveying the lithium carbonate and the adsorbed iron out through the separating device. The iron impurities in the conveyed lithium carbonate slurry are removed, so that the purity of the lithium carbonate obtained after drying is improved.
With reference to the first aspect, in a first possible implementation manner of the first aspect, the electric demagnetizing devices are provided in plurality, and the plurality of electric demagnetizing devices are uniformly arranged on the inner wall of the reaction kettle in a surrounding manner. The adoption of a plurality of electric demagnetizing devices can fully adsorb iron impurities so as to improve the purity of the lithium carbonate slurry.
With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the electric demagnetizing device includes an electromagnet. The electric demagnetizing device is not a permanent magnet device, and adopts an electromagnet, so that iron impurities can be adsorbed when the electromagnet is electrified, and the iron impurities fall off when the electromagnet is powered off. The lithium carbonate that contains iron impurity is circular telegram to the electro-magnet with the clear water stirring in-process, along with agitating unit's stirring in-process, adsorbs iron impurity. After the lithium carbonate slurry with the iron impurities removed is conveyed out from the reaction kettle, the electromagnet is powered off, and then the iron impurities in the reaction kettle are cleaned.
With reference to the first aspect, in a third possible implementation manner of the first aspect, the separation device includes a reactor discharge valve, a slurry discharge valve, and an iron powder discharge valve, a first end of the reactor discharge valve is communicated with the material outlet at the bottom of the reactor, and a second end of the reactor discharge valve is respectively communicated with the first end of the slurry discharge valve and the first end of the iron powder discharge valve. The discharge valve of the reaction kettle, the slurry discharge valve and the iron powder discharge valve are matched together to separate lithium carbonate and iron impurities and respectively convey the lithium carbonate and the iron impurities out of the reaction kettle. Specifically, when the iron impurities are adsorbed by the electric demagnetizing device, the discharge valve of the reaction kettle and the discharge valve of the slurry are opened, and the lithium carbonate slurry with the impurities removed is conveyed to the centrifugal drying device. Then close reation kettle bleeder valve and thick liquids bleeder valve once more, to the outage of electricity demagnetizer this moment, in adsorbed iron impurity falls into reation kettle, then pours into the clear water into reation kettle, opens reation kettle bleeder valve and iron powder bleeder valve, iron impurity enters into iron impurity collection device along with the clear water.
With reference to the first aspect, in a fourth possible implementation manner of the first aspect, a material inlet and a clean water inlet are formed in the top of the reaction kettle, the material inlet is provided with a crude lithium carbonate feeding valve, and the clean water inlet is provided with a water feeding valve. The material import is used for carrying thick lithium carbonate to reation kettle, and the clear water entry is used for pouring into the clear water, and thick lithium carbonate and clear water are carried the back that finishes, are closed through thick lithium carbonate feed valve and water feed valve.
With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the stirring device includes a driving motor, and a rotation output shaft of the driving motor is fixedly connected to the multi-blade stirring rod. The multi-blade stirring rod can fully stir the lithium carbonate slurry, so that the iron impurities are fully adsorbed.
With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the multi-blade stirring rod includes: a multi-blade stirring rod made of enamel materials, stainless steel or titanium materials. Enamel materials, stainless steel or titanium materials do not have magnetism, and the work of the stirring rod cannot be influenced in the electrifying process of the electric demagnetizing device.
With reference to the first aspect, in a seventh possible implementation manner of the first aspect, the reaction kettle includes: enamel material, stainless steel or titanium material.
Drawings
Fig. 1 is a schematic structural diagram of a purification apparatus for recovering lithium carbonate from a lithium iron phosphate battery according to an embodiment of the present invention;
in fig. 1, the symbols are represented as:
1-a reaction kettle, 2-a stirring device, 3-an electric demagnetizing device, 4-a material inlet, 5-a clear water inlet, 6-a crude lithium carbonate feed valve, 7-a water feed valve, 8-a reaction kettle discharge valve, 9-a slurry discharge valve, 10-an iron powder discharge valve and 11-a driving motor.
Detailed Description
The present invention will be described with reference to the accompanying drawings and embodiments.
Fig. 1 is a purification device for lithium iron phosphate battery retrieves lithium carbonate that the embodiment of the present invention provides, refer to fig. 1, and the purification device for lithium iron phosphate battery retrieves lithium carbonate in this embodiment includes: the reactor comprises a reaction kettle 1, wherein a stirring device 2 is arranged in the reaction kettle 1, an electric demagnetizing device 3 is arranged on the upper inner wall of the reaction kettle 1, and a material outlet at the bottom of the reaction kettle 1 is connected with a separating device.
The top is provided with material import 4 and clear water import 5 on reation kettle 1, material import 4 is provided with thick lithium carbonate feed valve 6, clear water import 5 is provided with water feed valve 7. The material import 4 is used for carrying thick lithium carbonate to reation kettle 1, and the clear water entry is used for pouring into the clear water into, and thick lithium carbonate and clear water transport back that finishes are closed through thick lithium carbonate feed valve 6 and water feed valve 7. Crude lithium carbonate with low purity and a certain proportion of water are fully stirred in the reaction kettle 1 through the stirring device 2. The electric demagnetizer 3 is energized to adsorb magnetic substances such as iron in the reaction kettle 1, and then the lithium carbonate and the adsorbed iron are respectively conveyed out through the separator. The iron impurities in the conveyed lithium carbonate slurry are removed, so that the purity of the lithium carbonate obtained after drying is improved.
In this embodiment, the plurality of electric demagnetizing devices 3 are arranged, and the plurality of electric demagnetizing devices 3 are uniformly arranged on the inner wall of the reaction kettle 1 in a surrounding manner. The adoption of the plurality of electric demagnetizing devices 3 can fully adsorb iron impurities in the lithium carbonate slurry so as to improve the purity of the lithium carbonate slurry.
The electric demagnetizing device 3 comprises an electromagnet. The electric demagnetizing device 3 is not a permanent magnet device, and adopts an electromagnet, so that iron impurities can be adsorbed when the electromagnet is electrified, and the iron impurities fall off when the electromagnet is powered off. The lithium carbonate that contains iron impurity is circular telegram to the electro-magnet with the clear water stirring in-process, along with agitating unit 2's stirring in-process, adsorbs iron impurity. After the lithium carbonate slurry with the iron impurities removed is conveyed out from the reaction kettle 1, the electromagnet is powered off, and then the iron impurities in the reaction kettle 1 are cleaned.
Further referring to fig. 1, the separation device includes a reactor discharge valve 8, a slurry discharge valve 9 and an iron powder discharge valve 10, a first end of the reactor discharge valve 8 is communicated with a material outlet at the bottom of the reactor 1, and a second end of the reactor discharge valve 8 is respectively communicated with a first end of the slurry discharge valve 9 and a first end of the iron powder discharge valve 10. The discharge valve 8 of the reaction kettle, the slurry discharge valve 9 and the iron powder discharge valve 10 are matched together to separate the lithium carbonate slurry and the iron impurities and respectively convey the lithium carbonate slurry and the iron impurities out of the reaction kettle 1.
Specifically, when the iron impurities are adsorbed by the electric demagnetizing device 3, the discharge valve 8 of the reaction kettle and the discharge valve 9 of the slurry are opened, and the lithium carbonate slurry with the impurities removed is conveyed to the centrifugal drying device. Then, the discharging valve 8 of the reaction kettle and the discharging valve 9 of the slurry are closed again, the electric demagnetizing device 3 is powered off at the moment, the adsorbed iron impurities fall into the reaction kettle 1, then clear water is injected into the reaction kettle 1, the discharging valve 8 of the reaction kettle and the discharging valve 10 of iron powder are opened, and the iron impurities enter the iron impurity collecting device along with the clear water.
The stirring device 2 comprises a driving motor 11, and a rotating output shaft of the driving motor 11 is fixedly connected with a multi-blade stirring rod. The multi-blade stirring rod can fully stir the lithium carbonate slurry, so that the iron impurities are fully adsorbed. Wherein, many flabellum puddler includes: a multi-blade stirring rod made of enamel materials, stainless steel or titanium materials. The enamel material, the stainless steel or the titanium material have no magnetism, and the work of the stirring rod can not be influenced in the electrifying process of the electric demagnetizing device 3. Also, in the present embodiment, the reaction tank 1 includes: a reaction kettle 1 made of enamel materials, stainless steel or titanium materials.
The specific steps of purifying the lithium carbonate by using the purification device provided by the above embodiment are as follows:
and opening a crude lithium carbonate feeding valve 6 and a water feeding valve 7, and putting crude lithium carbonate and water into the reaction kettle 1, wherein the liquid-solid ratio is set to be 3: 1.
And starting the stirring device 2 and the electric demagnetizing device 3 to react for 30-40 min.
After the crude lithium carbonate and water are fully stirred to remove iron impurities, a reaction kettle discharge valve 8 and a slurry discharge valve 9 at the bottom of the reaction kettle 1 are opened, slurry is discharged into a centrifuge to start centrifugation and drying, and at the moment, an iron powder discharge valve 10 is controlled to be in a closed state.
After the slurry is discharged, the discharge valve 8 of the reaction kettle and the discharge valve 9 of the slurry are closed, the electric demagnetizing device 3 is closed, the adsorbed iron and other magnetic substances automatically fall off, and the water feed valve 7 is opened to add a certain amount of water for agitation washing for 5 min.
And finally, opening the discharge valve 8 of the reaction kettle again, simultaneously opening the iron powder discharge valve 10, discharging and recovering the iron powder, and controlling the slurry discharge valve 9 to be in a closed state in the step.
After the iron impurities in the reaction kettle 1 are completely cleaned, adding crude lithium carbonate and clean water into the reaction kettle 1 again, and starting the next cycle process.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and if it is replaced, the present invention is only combined with and described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.
Claims (8)
1. The utility model provides a purification device for lithium carbonate is retrieved to lithium iron phosphate battery which characterized in that includes: the reaction kettle is internally provided with a stirring device and an electric demagnetizing device arranged on the upper inner wall of the reaction kettle, and a material outlet at the bottom of the reaction kettle is connected with a separating device.
2. The device for purifying lithium carbonate recovered from lithium iron phosphate batteries according to claim 1, wherein a plurality of the electric demagnetizing devices are arranged, and the plurality of the electric demagnetizing devices are uniformly arranged on the inner wall of the reaction kettle in a surrounding manner.
3. The purification device for recovering lithium carbonate from lithium iron phosphate batteries according to claim 1 or 2, characterized in that said electric demagnetizing device comprises an electromagnet.
4. The device for purifying lithium carbonate recovered from lithium iron phosphate battery according to claim 1, wherein the separation device comprises a reaction kettle discharge valve, a slurry discharge valve and an iron powder discharge valve, a first end of the reaction kettle discharge valve is communicated with the reaction kettle bottom material outlet, and a second end of the reaction kettle discharge valve is respectively communicated with a first end of the slurry discharge valve and a first end of the iron powder discharge valve.
5. The device for purifying lithium carbonate recovered from lithium iron phosphate batteries according to claim 1, wherein a material inlet and a clean water inlet are arranged at the top of the reaction kettle, the material inlet is provided with a crude lithium carbonate feeding valve, and the clean water inlet is provided with a water feeding valve.
6. The device for purifying lithium carbonate recovered from lithium iron phosphate batteries according to claim 1, wherein the stirring device comprises a driving motor, and a rotating output shaft of the driving motor is fixedly connected with a multi-blade stirring rod.
7. The apparatus for purifying lithium carbonate recovered from lithium iron phosphate battery according to claim 6, wherein the multi-blade stirring rod comprises: a multi-blade stirring rod made of enamel materials, stainless steel or titanium materials.
8. The apparatus for purifying lithium carbonate recovered from lithium iron phosphate battery according to claim 1, wherein the reaction kettle comprises: enamel material, stainless steel or titanium material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122108976.9U CN215277357U (en) | 2021-09-02 | 2021-09-02 | A purification device for lithium carbonate is retrieved to lithium iron phosphate battery |
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| CN202122108976.9U CN215277357U (en) | 2021-09-02 | 2021-09-02 | A purification device for lithium carbonate is retrieved to lithium iron phosphate battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023125029A1 (en) * | 2021-12-31 | 2023-07-06 | 比亚迪股份有限公司 | Recovery system |
| CN116651614A (en) * | 2023-07-28 | 2023-08-29 | 唐山鑫丰锂业有限公司 | Lithium carbonate purification unloading equipment |
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2021
- 2021-09-02 CN CN202122108976.9U patent/CN215277357U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023125029A1 (en) * | 2021-12-31 | 2023-07-06 | 比亚迪股份有限公司 | Recovery system |
| CN116651614A (en) * | 2023-07-28 | 2023-08-29 | 唐山鑫丰锂业有限公司 | Lithium carbonate purification unloading equipment |
| CN116651614B (en) * | 2023-07-28 | 2023-11-03 | 唐山鑫丰锂业有限公司 | Lithium carbonate purification unloading equipment |
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