CN203699917U - Secondary calcination kiln device for lithium iron phosphate material - Google Patents
Secondary calcination kiln device for lithium iron phosphate material Download PDFInfo
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- CN203699917U CN203699917U CN201420100126.1U CN201420100126U CN203699917U CN 203699917 U CN203699917 U CN 203699917U CN 201420100126 U CN201420100126 U CN 201420100126U CN 203699917 U CN203699917 U CN 203699917U
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- kiln
- calcination kiln
- roasting
- preroasting
- shielding gas
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Abstract
The utility model discloses a secondary calcination kiln device for a lithium iron phosphate material. The device comprises a pre-calcination kiln, a calcination kiln, a protective gas storage tank and a waste gas recovery processor, wherein the protective gas storage tank is sequentially connected with the pre-calcination kiln, the calcination kiln and the waste gas recovery processor through gas supply pipelines; a first flow control valve is arranged on the pipeline between the storage tank and the pre-calcination kiln; and a second flow control valve is arranged on the pipeline between the pre-calcination kiln and the calcination kiln. The secondary calcination kiln device can greatly save protective gas used for calcination of the lithium iron phosphate material, and is high in practicability and worthy of popularization.
Description
Technical field
The utility model relates to a kind of LiFePO 4 material re-baking kiln device.
Background technology
At present, the Application Areas of lithium ion battery has started to expand to electromobile, storage station, the large-sized battery fields such as military affairs.At lithium ion battery core component---LiFePO4 is undoubtedly the preferred material of the industrial large-sized power supply of heavy body, high-power, long lifetime, economic security in the middle of positive electrode material.Through the research and development of more than 10 years, this material progressively moved towards commercialization, and applied in the middle of heavy body, superpower and long-life type lithium ion battery market.
Because the iron in iron lithium phosphate is divalence, protect so need to pass into a large amount of rare gas elementes in roasting process.The high pure nitrogen that consumes 2.5m3 every day by a kiln calculates, and is used in the cost of protective gas January with regard to approximately 50,000 yuan.Over the past two years, on market, the price of iron lithium phosphate linearly declined, thereby reduced costs the task of top priority that becomes most LiFePO 4 material production firm.And prior art is carrying out iron lithium phosphate while carrying out roasting; all directly shielding gas to be poured in stoving oven, the complete rear direct discharge of roasting, and experimental results show that; shielding gas after roasting is complete still has provide protection, and directly discharge has just caused the waste of a large amount of shielding gas.
Utility model content
The utility model, in order to solve the above-mentioned deficiency of prior art, has proposed a kind of LiFePO 4 material re-baking kiln device.
In order to solve the problems of the technologies described above; the utility model is by the following technical solutions: a kind of LiFePO 4 material re-baking kiln device; comprise roasting kiln, preroasting kiln, shielding gas hold-up vessel and waste gas recycling device; shielding gas hold-up vessel connects roasting kiln, preroasting kiln and waste gas recycling device successively by steam line; and the pipeline between hold-up vessel and preroasting kiln is provided with first flow control valve, and the pipeline between preroasting kiln and roasting kiln is provided with second control valve.
In one embodiment, shielding gas hold-up vessel is nitrogen storage tank.
Compared with prior art; the shielding gas that the utility model uses roasting kiln is discharged in preroasting kiln after all collecting; wherein; preroasting kiln can carry out roasting in advance to LiFePO 4 material; and now the shielding gas in preroasting kiln is the shielding gas after roasting kiln uses; not only can reduce like this energy consumption of roasting; and improve the efficiency of roasting; shielding gas after the roasting kiln that has been its recycle of most worthy uses; also just directly reduced the consumption of shielding gas; reduce production cost, be worthy to be popularized.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, utility model is described in detail.
As shown in Figure 1; the LiFePO 4 material re-baking kiln device the utility model proposes; comprise roasting kiln 3, preroasting kiln 5, shielding gas hold-up vessel 1 and waste gas recycling device 6; shielding gas hold-up vessel 1 connects roasting kiln 3, preroasting kiln 5 and waste gas recycling device 6 successively by steam line; and the pipeline between hold-up vessel 1 and preroasting kiln 5 is provided with first flow control valve 2, the pipeline between preroasting kiln 5 and roasting kiln 3 is provided with second control valve 4.
In actual roasting process; shielding gas hold-up vessel 1 is nitrogen storage tank; liquid nitrogen from liquid nitrogen storage tank after decompress(ion) gasification, enter in roasting kiln 3 by steam line, kiln temperature is controlled at 700-750 ℃; furnace pressure remains on 80-100Pa; then discharge by chimney, then by the nitrogen of discharging through roasting kiln chimney, enter in pre-burning kiln 5 by pipeline; pre-burning kiln temperature is controlled at 500-650 ℃, and furnace pressure remains on 30-50Pa.Finally, the waste gas such as a large amount of steam that nitrogen produces after preroasting along with iron lithium phosphate forerunner stops, carbon monoxide, carbonic acid gas, discharge from chimney, discharge after waste gas recycling and processing device is processed.
The shielding gas that the utility model uses roasting kiln is discharged in preroasting kiln after all collecting; wherein; preroasting kiln can carry out roasting in advance to LiFePO 4 material; and now the shielding gas in preroasting kiln is the shielding gas after roasting kiln uses; not only can reduce like this energy consumption of roasting; and having improved the efficiency of roasting, the shielding gas after the roasting kiln that has been its recycle of most worthy uses, has also just directly reduced the consumption of shielding gas.
Above-described embodiment has only been expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the utility model patent and protection domain should be as the criterion with appended claims.
Claims (2)
1. a LiFePO 4 material re-baking kiln device, it is characterized in that: comprise roasting kiln (3), preroasting kiln (5), shielding gas hold-up vessel (1) and waste gas recycling device (6), described shielding gas hold-up vessel (1) connects roasting kiln (3) successively by steam line, preroasting kiln (5) and waste gas recycling device (6), and the pipeline between hold-up vessel (1) and preroasting kiln (5) is provided with first flow control valve (2), pipeline between preroasting kiln (5) and roasting kiln (3) is provided with second control valve (4).
2. LiFePO 4 material re-baking kiln device as claimed in claim 1, is characterized in that: described shielding gas hold-up vessel (1) is nitrogen storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420100126.1U CN203699917U (en) | 2014-03-06 | 2014-03-06 | Secondary calcination kiln device for lithium iron phosphate material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420100126.1U CN203699917U (en) | 2014-03-06 | 2014-03-06 | Secondary calcination kiln device for lithium iron phosphate material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203699917U true CN203699917U (en) | 2014-07-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420100126.1U Expired - Fee Related CN203699917U (en) | 2014-03-06 | 2014-03-06 | Secondary calcination kiln device for lithium iron phosphate material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203699917U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882605A (en) * | 2015-05-14 | 2015-09-02 | 王海峰 | Preparation method of lithium ion battery material lithium iron phosphate |
| CN110562948A (en) * | 2019-10-15 | 2019-12-13 | 俞杰 | complete roasting process for energy-saving regenerated lithium iron phosphate |
-
2014
- 2014-03-06 CN CN201420100126.1U patent/CN203699917U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882605A (en) * | 2015-05-14 | 2015-09-02 | 王海峰 | Preparation method of lithium ion battery material lithium iron phosphate |
| CN104882605B (en) * | 2015-05-14 | 2017-03-15 | 王海峰 | A kind of preparation method of lithium ion battery material LiFePO 4 |
| CN110562948A (en) * | 2019-10-15 | 2019-12-13 | 俞杰 | complete roasting process for energy-saving regenerated lithium iron phosphate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20150306 |
|
| EXPY | Termination of patent right or utility model |