CN205543048U - Super little crushing and drying lithium iron phosphate's of high temperature dry gas body closed circulation device - Google Patents
Super little crushing and drying lithium iron phosphate's of high temperature dry gas body closed circulation device Download PDFInfo
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- CN205543048U CN205543048U CN201620333888.5U CN201620333888U CN205543048U CN 205543048 U CN205543048 U CN 205543048U CN 201620333888 U CN201620333888 U CN 201620333888U CN 205543048 U CN205543048 U CN 205543048U
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- iron phosphate
- lithium iron
- lifepo4
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a super little crushing and drying lithium iron phosphate's of high temperature dry gas body closed circulation device, the utility model discloses to production lithium iron phosphate's sintering system, smash system, package system and carry out totally closed processing, lithium iron phosphate at the sintering, smash, seal in the process such as packing and carry, and simultaneously, the utility model discloses smash system configuration fluid energy mill, adopt the high temperature dry gas body for smashing the air supply, go on drying in the twinkling of an eye to jet flow type to lithium iron phosphate, make lithium iron phosphate smash and go on simultaneously with drying. The utility model provides an in the lithium iron phosphate production process interim product need constantly dry problem, practiced thrift the energy, reduced manufacturing cost.
Description
Technical field
This utility model relates to LiFePO4 preparing technical field, particularly to a kind of high-temperature dry air enclosed
Circulation micronizing is dried the device of LiFePO4.
Background technology
Lithium ion battery, owing to having the feature such as high-energy-density and high-specific-power concurrently, is acknowledged as most developing latent
The battery of power.And China's LiFePO4 industry development impetus is very swift and violent, (singly make a comment or criticism in this field at present
Pole material), the most tens of family of main production firm of the U.S., and interior ground number of the enterprise is many.From
For total level of production, current LiFePO4Research be in ascent stage, also have many application technologies to need
To study further.
Zhang Junxi et al. (CN1762798) prepares presoma, then high temperature sintering prepared sizes by coprecipitation
Uniformly, lithium iron phosphate positive material that specific surface area is high, its mean diameter is about 43.9nm, and particle size distribution is relatively
Narrow.K.Konstantinov et al. (Electrochimica Acta, 421-426 (2-3), 2004) uses solution
Spray technique, has been respectively synthesized granularity compared with the LiFePO thin, crystal is single, electrical conductivity is higher4/ C composite wood
Material, improves the chemical property of material.Du Wei et al. (CN201010019325) describes a kind of simple
The easy method preparing LiFePO4, by by Li source compound, P source compound, ferric iron source chemical combination
Thing and carbon compound carry out ball milling by a certain percentage and calcine, and prepare LiFePO4.
High temperature solid-state method is to synthesize LiFePO at present4Most common method, general employing cobalt acid lithium, Lithium hydrate
Deng for lithium source, the phosphorus source such as organic source of iron such as Ferrox., Ferrous acetate and ammonium di-hydrogen phosphate is based on certain chemistry
Amount is than mixing, and after ball milling is uniform, under inert gas shielding, high-temperature calcination synthesizes.Although the iron phosphate after Shao Jie
Lithium contains carbon coating layer, but still has stronger water absorption, and the LiFePO4 made moist can reduce battery life,
Affect battery power supplying efficiency, so the work that LiFePO4 dries protection against the tide is the most particularly significant.
LiFePO4 is carried, sinters, pulverizes, packs by traditional processing technology many employings open system,
Use double conic rotary vacuum dryer that material is dried, but this kind equipment needs condition of high vacuum degree to reduce
Vapourizing temperature in material, but condition of high vacuum degree is easily caused cost of bleeding and increases；Meanwhile, bipyramid rotary vacuum drying
The filling rate of machine material is only 30%～50%, and the drying time cycle is longer, is unfavorable for mass production phosphoric acid
Ferrum lithium.
In the production process of whole production LiFePO4, baking stage product had both reduced production effect repeatedly
Rate, is also greatly improved production cost, but the LiFePO4 in producing is not dried protection against the tide timely,
End product quality can be produced impact again, so how in sintering, pulverizing and last packaging molding
Control LiFePO4 moisture be one important and need the problem of solution badly.
Utility model content
The purpose of this utility model is: the problem existed for prior art, it is provided that a kind of high temperature drying gas
Body closed cycle micronizing is dried the device of LiFePO4, solves interim in LiFePO4 production process producing
Product need the problem being constantly dried, and save the energy, reduce production cost.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of high-temperature dry air closed cycle micronizing is dried the device of LiFePO4, including air-flow abrasive material
Storehouse, jet mill, grader, catcher, sifter and packer, described airflow milling feed bin and phosphoric acid
Ferrum lithium sintering kiln is closed and is connected, described airflow milling feed bin, jet mill, grader, catcher, sieve
Device and packer is divided to close connection successively.
As preferred version of the present utility model, the gas outlet of described catcher passes through compressor and filter
It is connected with jet mill.
As preferred version of the present utility model, described catcher, sifter and packer are arranged on protection against the tide and close
Indoor.
The beneficial effects of the utility model are:
1, the production sintering system of LiFePO4, crushing system, packaging system are sealed by this utility model entirely
Close process, LiFePO4 sintering, pulverize, the operation such as packaging close conveying, do not contact with humid air,
Make the moisture remaining LiFePO4 in the overall process of production less than 1000PPM, efficiently solve phosphorus
The problem that the interim product needed obtained in acid ferrum lithium production process is constantly dried, has saved the energy, improves
Production efficiency, reduces production cost.
2, this utility model crushing system arranges jet mill, and using high-temperature dry air is to pulverize source of the gas,
Carry out LiFePO4 jet flow moment is dried, make LiFePO4 pulverize and dry to carry out, further simultaneously
Improve production efficiency.It addition, crushing system uses high-temperature dry air closed cycle to use, decrease height
Temperature is dried gas consumption, reduces production cost.
3, (open type carries+opens technique of the present utility model (totally-enclosed+comminution by gas stream is dried) with traditional handicraft
Formula pulverizing+bipyramid vacuum drying+open type is packed) compare: on the energy consumption, circulating cooling water flow is the least
Time fewer 48.4m than traditional handicraft3, installed power reduces 636.4Kw, compressed air require and consumes less
315m3, a complete set of hour energy consumption is only the 47.3% of traditional handicraft.In cost accounting, work of the present utility model
Skill unit ton energy consumption is 0.17 ten thousand, only the 48.5% of traditional handicraft, estimates the annual energy consumption of traditional handicraft 1054.35
Wan Yuan, and the annual energy consumption of technique of the present utility model 503.33 ten thousand yuan, save 5,510,000 yuan in 1 year.
Accompanying drawing explanation
Fig. 1 is process chart of the present utility model；
Fig. 2 is apparatus structure schematic diagram of the present utility model.
Labelling in figure: 1-airflow milling feed bin, 2-jet mill, 3-grader, 4-catcher, 5-sifter,
6-packer, 7-LiFePO4 sintering kiln, 8-compressor, 9-filter, 10-protection against the tide closed chamber.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing pair
Preferred embodiment of the present utility model is described in detail.
Embodiment 1
A kind of high-temperature dry air closed cycle micronizing is dried the device of LiFePO4, including air-flow abrasive material
Storehouse 1, jet mill 2, grader 3, catcher 4, sifter 5 and packer 6, described air-flow abrasive material
Storehouse 1 is closed with LiFePO4 sintering kiln 7 and is connected, described airflow milling feed bin 1, jet mill 2, classification
Machine 3, catcher 4, sifter 5 and packer 6 close connection successively.
In conjunction with said apparatus, the method that high-temperature dry air closed cycle micronizing is dried LiFePO4, bag
Include following steps:
(1) LiFePO4 after being sintered by kiln (is obtained by the kiln such as roller furnace or rotary furnace sintering
LiFePO4/ C composite) use high-temperature dry air from LiFePO4 sintering kiln 7 through airflow milling feed bin 1
Closing is delivered to jet mill 2, uses high-temperature dry air pulverize LiFePO4 and dry；
(2) LiFePO4 after drying of pulverizing step (1) obtained uses high-temperature dry air to seal successively
Close and be delivered to grader 3 classification, catcher 4 collects and packer 6 is packed, and obtains superfine iron phosphate lithium and produces
Product, granularity d of superfine iron phosphate lithium product50=0.5～20 μm, moisture is less than 1000PPM.
Described high-temperature dry air can select nitrogen, argon or air, and its temperature is 60～180 DEG C, pressure
Being 0.2～0.8MPa, dew point temperature is-10～-80 DEG C.
LiFePO4 sintering, pulverize, the operation such as packaging close conveying, contact with humid air, makes to give birth to
The overall process produced remaining, the moisture of LiFePO4, less than 1000PPM, efficiently solves iron phosphate
The problem that the interim product needed obtained in lithium production process is constantly dried, has saved the energy, has improve life
Produce efficiency, reduce production cost；Meanwhile, jet mill uses high-temperature dry air to be to pulverize source of the gas,
Carry out LiFePO4 jet flow moment is dried, make LiFePO4 pulverize and dry to carry out, further simultaneously
Improve production efficiency.
Embodiment 2
Embodiment 2 is on the basis of embodiment 1, and the gas outlet of described catcher 4 passes through compressor 8
It is connected with jet mill 2 with filter 9；The high-temperature dry air that described catcher 4 flows out is through overcompression
Return to jet mill 2 after filtration recycle；High-temperature dry air closed cycle uses, and decreases high temperature
It is dried gas consumption, reduces production cost.
Embodiment 3
Embodiment 3 is on the basis of embodiment 1, and described catcher 4, sifter 5 and packer 6 are arranged
In moistureproof closed chamber 10, the relative humidity 1%～30% of moistureproof closed chamber 10, prevent product water suction to be subject to further
Tide.
Finally illustrate, above example only in order to the technical solution of the utility model to be described and unrestricted,
Although this utility model is described by referring to preferred embodiment of the present utility model, but ability
Territory it is to be appreciated by one skilled in the art that in the form and details various change can be made for it,
The spirit and scope of the present utility model limited without departing from appended claims.
Claims (3)
1. a high-temperature dry air closed cycle micronizing is dried the device of LiFePO4, it is characterised in that:
Including airflow milling feed bin, jet mill, grader, catcher, sifter and packer, described air-flow
Abrasive material storehouse and LiFePO4 sintering kiln are closed and are connected, described airflow milling feed bin, jet mill, grader,
Catcher, sifter and packer close connection successively.
High-temperature dry air closed cycle micronizing the most according to claim 1 is dried LiFePO4
Device, it is characterised in that: the gas outlet of described catcher is by compressor and filter and jet mill
Connect.
High-temperature dry air closed cycle micronizing the most according to claim 1 is dried LiFePO4
Device, it is characterised in that: described catcher, sifter and packer are arranged in moistureproof closed chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620333888.5U CN205543048U (en) | 2016-04-20 | 2016-04-20 | Super little crushing and drying lithium iron phosphate's of high temperature dry gas body closed circulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620333888.5U CN205543048U (en) | 2016-04-20 | 2016-04-20 | Super little crushing and drying lithium iron phosphate's of high temperature dry gas body closed circulation device |
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| Publication Number | Publication Date |
|---|---|
| CN205543048U true CN205543048U (en) | 2016-08-31 |
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| CN201620333888.5U Active CN205543048U (en) | 2016-04-20 | 2016-04-20 | Super little crushing and drying lithium iron phosphate's of high temperature dry gas body closed circulation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742577A (en) * | 2016-04-20 | 2016-07-06 | 绵阳流能粉体设备有限公司 | Method and device for superfine grinding and drying of lithium iron phosphate in closed circulation of high-temperature drying gas |
-
2016
- 2016-04-20 CN CN201620333888.5U patent/CN205543048U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742577A (en) * | 2016-04-20 | 2016-07-06 | 绵阳流能粉体设备有限公司 | Method and device for superfine grinding and drying of lithium iron phosphate in closed circulation of high-temperature drying gas |
| CN105742577B (en) * | 2016-04-20 | 2018-11-02 | 西南科技大学 | High-temperature dry air closed cycle ultramicro grinding dries the method and device of LiFePO4 |
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