CN216808939U - Lithium system is leached to lithium iron phosphate selectivity - Google Patents
Lithium system is leached to lithium iron phosphate selectivity Download PDFInfo
- Publication number
- CN216808939U CN216808939U CN202220403519.4U CN202220403519U CN216808939U CN 216808939 U CN216808939 U CN 216808939U CN 202220403519 U CN202220403519 U CN 202220403519U CN 216808939 U CN216808939 U CN 216808939U
- Authority
- CN
- China
- Prior art keywords
- lithium
- conveying device
- storage tank
- reaction kettle
- conveying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
Landscapes
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model discloses a lithium iron phosphate selective lithium leaching system, which comprises: the reaction unit, the conveying unit and the stirring unit; the reaction unit comprises a reaction kettle, a primary pulp storage tank, an oxidant storage tank, an acid leaching solution storage tank and a PH detection device; the PH detection device comprises a PH detector and a PH detection probe for detecting the PH value of the leached slurry in the reaction kettle; the conveying unit comprises a first conveying device, a second conveying device and a third conveying device; the raw stock storage tank conveys raw stock to the reaction kettle through the first conveying device; the oxidant storage tank conveys oxidant solution to the reaction kettle through the second conveying device; and the pickle liquor storage tank conveys the acid solution to the reaction kettle through the third conveying device. According to the utility model, the acid leaching reaction of the lithium iron phosphate is controlled to be carried out at a low acid degree, so that the lithium element is selectively leached, the concentration of the lithium element in the leached slurry is improved, and the utilization efficiency of the lithium element is increased.
Description
Technical Field
The utility model relates to the technical field of waste lithium battery recovery, in particular to a lithium iron phosphate selective lithium leaching system.
Background
The lithium iron phosphate is a novel lithium ion battery electrode material and is characterized by large discharge capacity, low price, no toxicity and no environmental pollution.
With the rapid development of new energy industry, the application range and market scale of lithium batteries are continuously enlarged, the demand of lithium is also continuously increased, if only natural resources are consumed, wastes are not recycled, wastes are changed into valuables, and the lithium resources are exhausted in one day.
In the treatment process of the waste batteries, a wet recovery technology is mostly adopted, and the main purpose is to recover valuable metals lithium, iron and phosphorus in the waste lithium iron phosphate anode material.
However, in the prior art, the purity of the lithium salt obtained by precipitation is difficult to control, the requirement on the corrosion resistance of equipment is high, metals such as aluminum, copper, iron and the like coexisting with lithium in the positive electrode material can be synchronously leached, and in order to obtain a qualified lithium carbonate product, the metals need to be synchronously removed, so that the difficulty is high, and higher recovery cost is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve at least one technical problem in the background art and provides a lithium iron phosphate selective lithium leaching system.
In order to achieve the above object, the present invention provides a lithium iron phosphate selective lithium leaching system, including:
the reaction unit, the conveying unit and the stirring unit;
the reaction unit comprises a reaction kettle, a primary pulp storage tank, an oxidant storage tank, an acid leaching solution storage tank and a PH detection device;
the PH detection device comprises a PH detector and a PH detection probe for detecting the PH value of the leached slurry in the reaction kettle;
the conveying unit comprises a first conveying device, a second conveying device and a third conveying device;
the raw stock storage tank conveys raw stock to the reaction kettle through the first conveying device;
the oxidant storage tank conveys oxidant solution to the reaction kettle through the second conveying device;
and the pickle liquor storage tank conveys the acid solution to the reaction kettle through the third conveying device.
Preferably, the reaction unit further comprises a leaching slurry storage tank for collecting the reacted leaching slurry.
Preferably, the conveying unit further comprises a fourth conveying device connected with the reaction kettle and the leaching slurry storage tank for conveying the leaching slurry.
Preferably, one end of the PH detection probe is connected with the PH detector, and the other end of the PH detection probe is placed in the reaction kettle and close to the connection port of the reaction kettle and the fourth conveying device.
Preferably, the primary slurry comprises a lithium iron phosphate solid and an aqueous solution.
Preferably, the stirring unit comprises a motor and a stirrer, wherein one end of the stirrer is connected with the motor, and the other end of the stirrer is placed in the reaction kettle and used for stirring reactants.
Preferably, the first conveying device, the second conveying device, the third conveying device and the fourth conveying device are all composed of conveying pumps and conveying pipelines.
The lithium iron phosphate selective lithium leaching system has the beneficial effects that:
according to the utility model, by combining the characteristics that lithium element in lithium iron phosphate has the strongest activity and is most likely to react, the lithium iron phosphate raw stock and an oxidant are subjected to oxidation reaction to change the crystal structure of the lithium iron phosphate, then the lithium iron phosphate is subjected to reaction with an acid solution, the pH value of the acid solution is controlled to be lower under the condition of monitoring by a pH detection device, so that the lithium iron phosphate is reacted with low acid, and other impurities except the lithium element in the lithium iron phosphate, such as iron, aluminum and the like, are not basically leached under the condition of low acid, so that the concentration of the lithium element in the leaching slurry after the lithium iron phosphate is leached is increased, the utilization efficiency of the lithium element is improved, and the loss of natural resources is further reduced.
Drawings
Fig. 1 shows a flow chart of a lithium iron phosphate selective lithium leaching system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of a lithium iron phosphate selective lithium leaching system according to an embodiment of the present invention, and as shown in fig. 1, the lithium iron phosphate selective lithium leaching system according to the present invention includes:
a reaction unit 1, a conveying unit 2 and a stirring unit 3;
the reaction unit 1 comprises a reaction kettle 101, a primary pulp storage tank 102, an oxidant storage tank 103, an acid leaching solution storage tank 104 and a PH detection device 105;
the conveyance unit 2 includes a first conveyance device 201, a second conveyance device 202, and a third conveyance device 203.
Specifically, a raw slurry containing a lithium iron phosphate solid and an aqueous solution is stored in the raw slurry storage tank 102; storing an oxidizer solution in an oxidizer storage tank 103; the acid solution is stored in the pickle liquor storage tank 104.
The first conveying device 201, the second conveying device 202 and the third conveying device 203 are all composed of conveying pipelines and conveying pumps.
One end of the first conveying device 201 is connected to an outlet of the raw slurry storage tank 102, and the other end is connected to an inlet of the reaction kettle 101, and the raw slurry storage tank 102 can convey the raw slurry therein to the bottom of the reaction kettle 101 through a conveying pipe by using a conveying pump to wait for a subsequent reaction.
One end of the second conveying device 202 is connected to an outlet of the oxidant storage tank 103, and the other end is connected to an inlet of the reaction kettle 101, and the oxidant storage tank 103 can convey the oxidant therein to the reaction kettle 102 through a conveying pipe by using a conveying pump, so as to perform an oxidation reaction with the primary pulp.
One end of the third conveying device 203 is connected with an outlet of the pickle liquor storage tank 104, the other end is connected with an inlet of the reaction kettle 101, and the pickle liquor storage tank 104 can convey the acid solution in the pickle liquor storage tank into the reaction kettle 102 through a conveying pipeline by using a conveying pump to perform a replacement reaction with the primary pulp.
The reaction unit 1 of the present invention further comprises a leaching slurry storage tank 106, and the leaching slurry storage tank 106 is used for collecting the leaching slurry after the reaction in the reaction kettle 101.
The conveying unit 2 further comprises a fourth conveying device 204, which is also composed of a conveying pipeline and a conveying pump, and one end of the fourth conveying device 204 is connected with the inlet of the leaching slurry storage tank 106, and the other end of the fourth conveying device is connected with the outlet of the reaction kettle 101, and the leaching slurry after reaction in the reaction kettle 101 can be conveyed into the leaching slurry storage tank 106 through the conveying pipeline by the conveying pump through the fourth conveying device 204, so that the subsequent process steps can be completed again.
And the PH detection device 105 for detecting the PH value of the leached slurry after the reaction of the reaction kettle 101 comprises a PH detector 1051 and a PH detection probe 1052, specifically, one end of the PH detection probe 1052 is connected with the PH detector 1051, the other end of the PH detection probe is placed beside a connector of the reaction kettle 101 close to the fourth conveying device 204, and the PH value of the leached slurry in the reaction kettle 101 is detected, the PH value of the leached slurry is judged, so that the composition of the leached slurry is deduced, and after the standard is met, the leached slurry can be conveyed to the leached slurry storage tank 106.
Meanwhile, the utility model also provides a stirring unit 3, which comprises: the motor 301 and the stirrer 302 can stir the materials in the reaction kettle 101, increase the contact area of the materials and increase the reaction rate.
According to the arrangement of the lithium iron phosphate selective lithium leaching system, the working principle in practical use is as follows:
the primary pulp in the primary pulp storage tank 102 is conveyed into the reaction kettle 101 through the first conveying device 201, the oxidant in the oxidant storage tank 103 is conveyed into the reaction kettle 101 through the third conveying device 203, the oxidant is stirred through the stirring unit 3, meanwhile, the acid solution in the acid leaching solution storage tank 104 is slowly conveyed into the reaction kettle 101 to react with the primary pulp, the pH value of the leached pulp is detected by the pH detection device 105, and then the addition amount of the acid solution is controlled.
The oxidant is conveyed into the reaction kettle 101 to react with the primary pulp, so that the chemical valence state of iron element in the lithium iron phosphate can be changed, the crystal structure of the lithium iron phosphate is further destroyed, and the lithium iron phosphate can be leached under the condition of low acid. Under the condition of low acid, other impurities in the lithium iron phosphate, such as iron, aluminum, phosphorus and the like, are little or not leached, so that the ion concentration of the impurities in the leaching slurry is reduced, the ion concentration of lithium element in the leaching slurry is further improved, and the lithium carbonate with high-concentration lithium element obtained after the leaching slurry is finally precipitated is ensured.
According to the utility model, by combining the characteristics of strongest activity and most easy reaction of lithium element in lithium iron phosphate, the lithium iron phosphate raw stock is firstly subjected to oxidation reaction with an oxidant, the crystal structure of the lithium iron phosphate is changed, then the lithium iron phosphate is subjected to reaction with an acid solution, the pH value of the acid solution is controlled to be lower under the condition of monitoring by a pH detection device 105, so that the lithium iron phosphate is subjected to reaction with low acid, and impurities except the lithium element in the lithium iron phosphate, such as iron, aluminum and the like, are not basically leached under the condition of low acid, the concentration of the lithium element in the leaching slurry after the lithium iron phosphate is leached is increased, the utilization efficiency of the lithium element is improved, and the loss of natural resources is further reduced.
The above embodiments are only for assisting understanding of the manufacturing method and the core concept of the present invention, and the specific implementation is not limited to the above embodiments, and those skilled in the art can make changes without creative efforts from the above concepts, and all of them fall within the protection scope of the present invention.
Claims (7)
1. Lithium iron phosphate selectively leaches lithium system, includes:
a reaction unit (1), a conveying unit (2) and a stirring unit (3);
the reaction unit (1) comprises a reaction kettle (101), a primary pulp storage tank (102), an oxidant storage tank (103), an acid leaching solution storage tank (104) and a PH detection device (105);
the PH detection device (105) comprises a PH detector (1051) and a PH detection probe (1052) for detecting the PH value of the leaching slurry in the reaction kettle (101);
the conveying unit (2) comprises a first conveying device (201), a second conveying device (202) and a third conveying device (203);
the raw stock storage tank (102) conveys raw stock to the reaction kettle (101) through the first conveying device (201);
the oxidant storage tank (103) conveys an oxidant solution to the reaction kettle (101) through the second conveying device (202);
the pickle liquor storage tank (104) conveys the acid solution to the reaction kettle (101) through the third conveying device (203).
2. The lithium iron phosphate selective lithium leaching system according to claim 1, wherein the reaction unit (1) further comprises a leaching slurry storage tank (106) for collecting the reacted leaching slurry.
3. The lithium iron phosphate selective lithium leaching system according to claim 2, wherein the conveying unit (2) further comprises a fourth conveying device (204) connected with the reaction kettle (101) and the leaching slurry storage tank (106) for conveying the leaching slurry.
4. The system for selectively leaching lithium from lithium iron phosphate according to claim 3, wherein one end of the pH detection probe (1052) is connected to the pH detector (1051), and the other end of the pH detection probe is placed in the reaction kettle (101) near a connection port of the reaction kettle (101) and the fourth conveying device (204).
5. The system of claim 1, wherein the primary slurry comprises a solid lithium iron phosphate and an aqueous solution.
6. The lithium iron phosphate selective lithium leaching system of claim 1, wherein the stirring unit (3) comprises a motor (301) and a stirrer (302) with one end connected with the motor (301) and the other end placed in the reaction kettle (101) for stirring reactants.
7. The lithium iron phosphate selective lithium leaching system of claim 1, wherein the first conveying device (201), the second conveying device (202), the third conveying device (203) and the fourth conveying device (204) are each composed of a conveying pump and a conveying pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220403519.4U CN216808939U (en) | 2022-02-25 | 2022-02-25 | Lithium system is leached to lithium iron phosphate selectivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220403519.4U CN216808939U (en) | 2022-02-25 | 2022-02-25 | Lithium system is leached to lithium iron phosphate selectivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216808939U true CN216808939U (en) | 2022-06-24 |
Family
ID=82043924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220403519.4U Active CN216808939U (en) | 2022-02-25 | 2022-02-25 | Lithium system is leached to lithium iron phosphate selectivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216808939U (en) |
-
2022
- 2022-02-25 CN CN202220403519.4U patent/CN216808939U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Yu et al. | A redox targeting-based material recycling strategy for spent lithium ion batteries | |
| CN102618884B (en) | Lead regeneration method for recovering lead paste from waste lead acid storage battery by wet method | |
| CN104659438B (en) | A kind of method that utilization refuse battery prepares ternary anode material precursor | |
| CN104131285B (en) | The recovery method of ferric trichloride etching waste liquor | |
| CN109161895A (en) | Acid copper chloride etching liquid copper reclaiming system and reclaiming method | |
| CN207227597U (en) | A kind of silicon wafer wool making system that can recycle waste liquid | |
| CN112234238B (en) | Method for preparing iron-chromium redox battery electrolyte | |
| CN109234546A (en) | A kind of waste lithium cell positive mix subsequent leaching system and leaching technology | |
| CN216808939U (en) | Lithium system is leached to lithium iron phosphate selectivity | |
| CN112095008A (en) | Efficient clean leaching method for failed lithium ion battery positive electrode material | |
| CN207552063U (en) | A kind of waste water treatment system | |
| CN106893859B (en) | A method of processing nickel cobalt waste material | |
| CN218403896U (en) | Discharge wastewater recycling treatment device and waste lithium battery treatment system | |
| CN207451636U (en) | The system that MgZn ferrite is prepared using pickling sludge and pickle liquor | |
| CN206616052U (en) | A kind of processing equipment of ITO etching waste liquids | |
| CN214915925U (en) | Automatic high-yield production line for preparing and purifying cathode materials | |
| CN115490353A (en) | Method and equipment for removing heavy metal ion impurities in iron-containing salt solution | |
| CN114976336A (en) | Method for leaching lithium from lithium battery positive electrode material | |
| CN206564729U (en) | A kind of pcb board corrosion reaction energy collecting system | |
| CN111733444A (en) | Stainless steel etching solution cyclic regeneration system and method of ferric trichloride | |
| CN110265676A (en) | A method of cobalt acid lithium is leached using microbiological fuel cell | |
| CN218393032U (en) | Equipment for safely treating hydrogen through electro-oxidation process | |
| CN218291052U (en) | Ferronickel leaching equipment | |
| CN215783389U (en) | Lime neutralization and waste acid treatment device for lead storage battery recovery | |
| CN117080491B (en) | Purification method of electrolyte of flow battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |