CN203807180U - Internal serial graphitization furnace for producing artificial graphite negative electrode material - Google Patents
Internal serial graphitization furnace for producing artificial graphite negative electrode material Download PDFInfo
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- CN203807180U CN203807180U CN201420222041.0U CN201420222041U CN203807180U CN 203807180 U CN203807180 U CN 203807180U CN 201420222041 U CN201420222041 U CN 201420222041U CN 203807180 U CN203807180 U CN 203807180U
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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
Abstract
The utility model discloses an internal serial graphitization furnace for producing an artificial graphite negative electrode material. The graphitization furnace comprises a furnace body, wherein conductive electrodes and pressurizing devices are arranged at two ends of the furnace body; one end of each conductive electrode is arranged inside the furnace; the other end of each conductive electrode stretches outside the furnace and is connected with each pressurizing device; the furnace is internally provided with crucibles; crucible covers are arranged on the crucibles; an insulating layer formed by an insulating material is arranged at the bottom inside the furnace; a crucible layer is arranged above the insulating layer; the crucible layer comprises more than two crucibles which are identical in specification and are provided with negative electrode materials; the crucibles are arranged in an upright manner, that is, the openings of the crucibles face upwards and are perpendicular to the axis of the furnace head and the furnace tail and the crucible covers are parallel to the horizontal plane; the distance between every two adjacent crucibles is 5-15mm; graphite pads of which the electrical resistivity is equivalent to that of the crucibles are connected among the crucibles and between the crucibles and the furnace head conductive electrodes, thereby forming a graphitization power supply area; another insulating layer is arranged above the crucible layer; the crucible covers are connected with opening edges of the upper ends of the crucibles in a contact manner.
Description
Technical field
The utility model relates to a kind of synthetic graphite processing units, relates in particular to a kind of graphitizing furnace of producing artificial plumbago negative pole material.
Background technology
Artificial plumbago negative pole material is a kind of of carbon negative pole material, is mainly used in the manufacture of lithium cell.In numerous lithium celies, carbon negative electrode lithium ion battery shows excellent aspect safety and cycle life, and carbon material is environmentally friendly, and commodity lithium ion battery extensively adopts carbon negative pole material at present.Wherein, graphite negative electrodes material is with its wide material sources, low price, and several large advantages such as stable performance become the main Types of carbon negative pole material.
Graphite cathode material is divided into natural graphite, synthetic graphite and carbonaceous mesophase spherules three classes.Carbonaceous mesophase spherules has the advantages such as ball-like structure, specific surface area are little, layer molecule homogeneous texture and is considered to make the representative a kind of carbon material of cathode of lithium battery.But due to carbosphere complex manufacturing, the price comparison of carbonaceous mesophase spherules is expensive, its extensive utilization has been formed to certain limitation.Natural graphite has structural integrity, be embedded into the advantages such as position is many, so capacity is higher, is also a kind of desirable lithium cell cathode material.But it is responsive to ionogen, and high rate during charging-discharging is poor, and cycle life is short.Synthetic graphite is through pulverizing easy graphited refinery coke, needle coke, coated polymer pyrolytic carbon, shaping is modified, pass through again high temperature graphitization, form the spherical composite graphite with nucleocapsid structure, its degree of crystallinity (degree of graphitization) height, good with the consistency of electrolytic solution, have good charge-discharge performance and cycle performance, reversible charging capacity can reach 350mAh/g, and irreversible capacity is below 10%.Synthetic graphite performance and natural graphite are more or less the same, but the prices of raw and semifnished materials reduce by more than 50, and price is lower than natural graphite.Especially in recent years applied research discovery, synthetic graphite has good effect aspect cycle performance and heavy-current discharge, and market potential is huge.
The production process of artificial plumbago negative pole material mainly comprises selection, beat powder, be shaped as spherical, coated, charing and greying.Greying is one important procedure in artificial plumbago negative pole material production process.
What at present, most of traditional methods were taked is that acheson furnace (large Once-through Boiler) is processed artificial plumbago negative pole material.The principle of acheson furnace be by electric current flow through stove internal resistance material make resistance material produce a large amount of heat energy (conventionally resistance material need reach the high temperature of 3000 degree left and right) and then by thermal energy transfer to product, finally realize product greying.Use acheson furnace processing negative material to need power transmission 30-40 hour, the power consumption of product per ton is at 15000-16000 degree, and electric unit consumption is high, and environmental pollution is larger; Meanwhile, owing to limited by self processing mode, acheson furnace the upper and lower temperature distributing disproportionation is even, easily causes in graphitizing process the product inequality of being heated to cause its degree of graphitization uneven, thereby affects quality product.
In order to overcome the defect of acheson furnace, have now and adopt inner string graphitization stove.The principle of inner string graphitization stove is by product is serially connected in a certain way in stove, makes electric current flow through product itself and produce a large amount of heat energy and reach certain temperature (conventionally at 3000-3100 degree) and realize product greying during energising.At present, employing inner series graphitizing furnace processing negative material, its charging mode is sleeping dress, the crucible mode sleeping to put down, head and the tail serial connection that is about to be equipped with negative material packs graphitizing furnace into, greying electric power feeding time needs 20-30 hour, produce the power consumption of product per ton at 13000-13500 degree electricity, production cost is saved general 15%-20% than acheson furnace.Compare with acheson furnace, the advantage of inner string graphitization stove is mainly that electric unit consumption is low, saves cost, and environmental pollution is little.
But, existing horizontal assembled type inner string graphitization stove also has not as people's will part: the one, and high to crucible requirement, during sleeping dress, for product is heated and degree of graphitization inside and outside evenly, crucible is designed to porous structure (as shown in Figure 1), plumbago crucible body and some small holes, consists of, and small holes is used for placing product, effective usage space of crucible is not high, has affected the production efficiency of graphitizing furnace; The 2nd, because horizontal shove charge is higher to crucible requirement of strength, require sidewall of crucible very thick, the heat energy by the heat producing losses of crucible own when greying power transmission is larger, and electric energy effective rate of utilization is not high; The 3rd, due to higher to crucible requirement of strength, its difficulty of processing is also larger, and crucible production cost is high; The 4th, during due to horizontal shove charge, the contact surface of product and crucible is larger, and the pot cover of crucible is tightened on crucible, therefore, easily cause Graphite Powder 99 on crucible come off and introduce impurity dust coming out of the stove while opening crucible, the volatile matter that product produces in graphitizing process simultaneously is also difficult for discharging, also cause the impact on quality product, cause purity not high.
Utility model content
The technical problems to be solved in the utility model is to provide the inner string graphitization stove of the production artificial plumbago negative pole material that a kind of production efficiency is high, cost is low, product purity is high.
In order to solve the problems of the technologies described above, the inner string graphitization stove of production artificial plumbago negative pole material of the present utility model, comprise body of heater, at the two ends of body of heater, be provided with conducting electrode and pressurizing device, conducting electrode one end is located in stove, the other end stretches out outside stove and is connected with pressurizing device, in stove, be provided with crucible, crucible is provided with crucible cover, and described stove inner bottom part is provided with the thermal insulation layer being formed by lagging material; Above described thermal insulation layer, be provided with crucible layer, described crucible layer comprises the above specification of 2 post crucible identical, that negative material is housed, in the mode erect, to be that crucible is opening up be parallel to horizontal plane setting perpendicular to burner stove shaft line, crucible cover with crucible, and between adjacent crucible at a distance of 5-15mm; Between described crucible and between crucible and burner conducting electrode, be connected with the graphite matter cushion block that resistivity is suitable with crucible, to become greying feeding section; Described crucible layer top is provided with thermal insulation layer; Described crucible cover is connected along contact with crucible upper end open.
Described crucible layer is preferably 1-2 layer, preferably 1 layer.
Described crucible is hollow circular cylinder, is preferably: diameter is 500mm, the high 730mm of being, intracavity diameter is 460mm, the high 680mm of being.
Crucible layer, is preferably 5-15mm apart between every layer of adjacent crucible, surpasses this scope by impact effect or increases cost, 7-13mm more preferably, then be preferably 8-11mm, more preferably 8mm.
Described stove inner bottom part insulation layer thickness is preferably 400-600mm, and surpass this scope by impact effect or increase cost, 450-550mm more preferably, then be preferably 500mm.
The insulation layer thickness of described crucible layer top is preferably 800-1000mm, and surpass this scope by impact effect or increase cost, 850-950mm more preferably, then be preferably 900mm.
Graphite matter cushion block height between described crucible is identical with crucible height, with the face of crucible outer wall close contact be semicircle cambered surface.
Described crucible is identical with crucible height with the graphite matter cushion block height between burner conducting electrode, with the face of crucible outer wall close contact be semicircle cambered surface, with the face of conducting electrode close contact be plane.
Adopt structure of the present utility model, can overcome the defect of prior art, production efficiency is high, cost is low, product purity is high.Compare with the horizontal shove charge of existing inner string graphitization stove, main advantage of the present utility model is: first, less demanding to crucible, can adopt hollow circular cylinder crucible, for the crucible of same profile specification, effective usage space of the porous structure crucible that horizontal shove charge method is used is only 70% of the utility model right cylinder crucible, like this, greatly improve effective usage space of crucible, at utmost promoted the production efficiency of graphitizing furnace; Second, the utility model is not due to high to the thickness requirement of crucible, sidewall of crucible is thinner, overwhelming majority electric energy is all converted into needed heat energy in product self graphitizing process, electric energy effective rate of utilization is high, the electric unit consumption of product per ton reduces 10-15% than horizontal shove charge method, and, because the electro-conductive material between crucible especially graphite matter cushion block resistivity and crucible have quite increased the contact surface between crucible, distribution while making electric current flow through product itself is more even, also can reduce electric unit consumption and improve the quality of products; The 3rd, because the utility model is not high to the specification of quality of crucible itself, can use regeneration plumbago crucible, it has the advantages such as production technique is simple, material cost is low, produce a crucible of the present utility model and will save 5000 yuan of left and right than the crucible of horizontal shove charge method, greatly reduced production cost, the electric unit consumption of comprehensive above two kinds of charging modes and crucible become original and calculate, the cost that adopts the utility model to process product per ton can be saved 15% left and right than horizontal shove charge method, and the production efficiency of graphitizing furnace also significantly promotes; The 4th, because crucible cover of the present utility model does not need to tighten, crucible cover is to be connected along contact with crucible upper end open, only need cover at crucible surface, while coming out of the stove, only need open crucible cover, then with cleaning spade, surperficial one deck dust is cleaned out, the impurity of introducing few, and the volatile matter that produces in graphitizing process of product also discharges than being easier to, so the product purity of producing is higher, after testing, its product purity can reach 99.9%.
Artificial plumbago negative pole material inner string graphitization stove of the present utility model and crucible thereof and graphite matter cushion block, simple in structure, to manufacture easy to usely, cost is low.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of existing horizontal assembled type inner string graphitization stove crucible used;
Fig. 2 is the structural representation of graphitizing furnace of the present utility model;
Fig. 3 is the vertical view of graphitizing furnace of the present utility model;
Fig. 4 is the structural representation of graphitizing furnace of the present utility model crucible used;
Fig. 5 is the graphite matter cushion block structure schematic diagram between crucible in graphitizing furnace of the present utility model;
Fig. 6 is the graphite matter cushion block structure schematic diagram between crucible and conducting electrode in graphitizing furnace of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail:
As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, artificial plumbago negative pole material inner string graphitization stove of the present utility model, comprises body of heater 5, is provided with conducting electrode 1 and pressurizing device 4 at the two ends of body of heater.Conducting electrode one end is located in stove, the other end stretches out outside stove and is connected with pressurizing device.In stove, be provided with crucible 2.Crucible is provided with crucible cover 3.Stove inner bottom part is provided with the thermal insulation layer 6 being formed by lagging material.Above thermal insulation layer, be provided with crucible layer.Crucible layer comprises the above specification of 2 post crucible identical, that negative material is housed, and in the mode erect, to be that crucible is opening up be parallel to horizontal plane setting perpendicular to burner stove shaft line, crucible cover with crucible, and between adjacent crucible at a distance of 8mm.Between crucible and between crucible and burner conducting electrode, be connected with the graphite matter cushion block 7 that resistivity is suitable with crucible, to become greying feeding section.Crucible layer top is provided with thermal insulation layer.Crucible cover is connected along contact with crucible upper end open.
In stove, the quantity of crucible is determined according to this furnace inner space and crucible volume.
The lagging material of thermal insulation layer is conventional material, if its component and weight ratio can be 3 parts of 7 parts of the burnt grains of metallurgical coke of diameter 10mm and quartz sands.
Crucible layer is preferably 2 layers, and contact stacks; 1 layer of the best.
As shown in Figure 4, crucible is preferably hollow circular cylinder, is preferably: diameter is 500mm, the high 730mm of being, intracavity diameter is 460mm, the high 680mm of being.
Between crucible and the graphite matter cushion block being connected between crucible and burner conducting electrode, resistivity and crucible are suitable, are below 50 μ Ω .m.
As shown in Figure 5, Figure 6, the graphite matter cushion block height between crucible is identical with crucible height, with the face of crucible outer wall close contact be semicircle cambered surface.Crucible is identical with crucible height with the graphite matter cushion block height between burner conducting electrode, with the face of crucible outer wall close contact be semicircle cambered surface, with the face of conducting electrode close contact be plane.Like this, can increase between crucible the contact area with graphite matter cushion block and burner conducting electrode and graphite matter cushion block, reduce electric energy loss.
Stove inner bottom part insulation layer thickness is preferably 400-600mm, and surpass this scope by impact effect or increase cost, 450-550mm more preferably, then be preferably 500mm.
Crucible layer, is preferably 5-15mm apart between every layer of adjacent crucible, surpasses this scope by impact effect or increases cost, 7-13mm more preferably, then be preferably 8-11mm, more preferably 8mm.
The insulation layer thickness of crucible layer top is preferably 800-1000mm, and surpass this scope by impact effect or increase cost, 850-950mm more preferably, then be preferably 900mm.
Using method of the present utility model comprises the steps:
A. with insulation material, at inner string graphitization stove inner bottom part, pave compacting and form thermal insulation layer;
B. by specification crucible identical, that negative material is housed, in the mode of erectting, being that crucible is opening up is parallel to horizontal plane perpendicular to burner stove shaft line, crucible cover and is positioned in stove and on above-mentioned thermal insulation layer, forms crucible layer, and described crucible layer is that the contact of 1-2 layer stacks;
C. between crucible and between crucible and burner conducting electrode, with the resistivity graphite matter cushion block suitable with crucible, tamping;
D. above crucible layer, re-lay insulation material and form thermal insulation layer;
E. with the pre-closely crucible gap of pressurizing device pressurization;
F. to power transmission 23-25 hour in stove, current density 20-26A/cm2, the power transmission later stage, current density was promoted to 26A/cm2 so that the product temperature in crucible is promoted to 3000-3100 ℃, and in time the pressure of pressurizing device was adjusted;
G. stop to power transmission in stove, naturally cooling is about 48 hours;
H. remove after thermal insulation layer and conductive layer, then naturally cooling is about 48 hours.
Claims (9)
1. an inner string graphitization stove of producing artificial plumbago negative pole material, comprise body of heater (5), at the two ends of body of heater, be provided with conducting electrode (1) and pressurizing device (4), conducting electrode one end is located in stove, the other end stretches out outside stove and is connected with pressurizing device, in stove, be provided with crucible (2), crucible is provided with crucible cover (3), it is characterized in that: described stove inner bottom part is provided with the thermal insulation layer (6) being formed by lagging material; Above described thermal insulation layer, be provided with crucible layer, described crucible layer comprises the above specification of 2 post crucible identical, that negative material is housed, in the mode erect, to be that crucible is opening up be parallel to horizontal plane setting perpendicular to burner stove shaft line, crucible cover with crucible, and between adjacent crucible at a distance of 5-15mm; Between described crucible and between crucible and burner conducting electrode, be connected with the graphite matter cushion block (7) that resistivity is suitable with crucible, to become greying feeding section; Described crucible layer top is provided with thermal insulation layer; Described crucible cover is connected along contact with crucible upper end open.
2. graphitizing furnace according to claim 1, is characterized in that: described crucible layer is 1-2 layer.
3. graphitizing furnace according to claim 1, is characterized in that: described crucible layer is 1 layer.
4. graphitizing furnace according to claim 1, is characterized in that: described crucible is hollow circular cylinder, diameter be 500mm, high be 730mm, intracavity diameter be 460mm, high be 680mm.
5. graphitizing furnace according to claim 1, is characterized in that: described stove inner bottom part insulation layer thickness is 400-600mm.
6. graphitizing furnace according to claim 1, is characterized in that: the insulation layer thickness of described crucible layer top is 800-1000mm.
7. graphitizing furnace according to claim 1, is characterized in that: between described crucible at a distance of 8mm.
8. graphitizing furnace according to claim 1, is characterized in that: the graphite matter cushion block height between described crucible is identical with crucible height, with the face of crucible outer wall close contact be semicircle cambered surface.
9. graphitizing furnace according to claim 1, is characterized in that: described crucible is identical with crucible height with the graphite matter cushion block height between burner conducting electrode, with the face of crucible outer wall close contact be semicircle cambered surface, with the face of conducting electrode close contact be plane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420222041.0U CN203807180U (en) | 2014-05-04 | 2014-05-04 | Internal serial graphitization furnace for producing artificial graphite negative electrode material |
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| CN201420222041.0U CN203807180U (en) | 2014-05-04 | 2014-05-04 | Internal serial graphitization furnace for producing artificial graphite negative electrode material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964423A (en) * | 2014-05-04 | 2014-08-06 | 郴州市三晶科贸有限公司 | Production method of artificial graphite cathode materials in manner of inner tandem graphitization and graphitization furnace |
| CN116907213A (en) * | 2023-07-21 | 2023-10-20 | 大连宏光锂业有限责任公司 | Novel energy-saving crucible with graphite paper |
-
2014
- 2014-05-04 CN CN201420222041.0U patent/CN203807180U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964423A (en) * | 2014-05-04 | 2014-08-06 | 郴州市三晶科贸有限公司 | Production method of artificial graphite cathode materials in manner of inner tandem graphitization and graphitization furnace |
| CN116907213A (en) * | 2023-07-21 | 2023-10-20 | 大连宏光锂业有限责任公司 | Novel energy-saving crucible with graphite paper |
| CN116907213B (en) * | 2023-07-21 | 2024-02-09 | 大连宏光锂业有限责任公司 | Energy-saving crucible with graphite paper |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20150504 |
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