CN108529616A - A kind of the high temperature purification technique and device of natural graphite - Google Patents
A kind of the high temperature purification technique and device of natural graphite Download PDFInfo
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- CN108529616A CN108529616A CN201810604668.5A CN201810604668A CN108529616A CN 108529616 A CN108529616 A CN 108529616A CN 201810604668 A CN201810604668 A CN 201810604668A CN 108529616 A CN108529616 A CN 108529616A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/20—Graphite
- C01B32/21—After-treatment
- C01B32/215—Purification; Recovery or purification of graphite formed in iron making, e.g. kish graphite
Abstract
The high temperature purification technique and device, technique of a kind of natural graphite includes：One, it pre-processes, removes the moisture and organic volatile in raw material；Two, raw material feeding rotary calcining device is calcined, raw material is in suspended state thermally equivalent when calcining；2600 ~ 4200 DEG C of temperature, 6 ~ 40min of time；It is filled with protective gas in calciner plant and forms protective atmosphere；The concentration of protective gas is greater than or equal to 85%, and pressure is 0.005 ~ 0.1MPa；Three, impurity component distillation is that gas is overflowed by the exhaust passage of calciner plant, and graphite products are discharged through discharge end；Its device includes feed zone, calcining section and discharging section；Feed zone includes the first heating cylinder, is equipped with feed inlet and feeding mechanism；Calcining section, there is the second heating cylinder of revolution, front end to be connected with feeding mechanism, and rear end is connected with discharging section；Discharging section includes third heating cylinder, is equipped with discharge port and gas injection port, and the latter is used for the insufflation protective gas into device；Device is additionally provided with exhaust outlet, opens up positioned at the front of calcining section and upwards.
Description
Technical field
The present invention relates to the natural graphite manufacture fields in nonmetallic ore, and in particular to a kind of high temperature purification of natural graphite
Technique and device.
Background technology
Graphite is one of most important nonmetallic mineral resource in the world, and purposes is very extensive.Based on its excellent conduction
Property, thermal conductivity, heat-resisting quantity, anti-rapid heat cycle, graphite become metal smelt, machine-building, electronics industry, space flight and aviation and
One of the most important raw material of the indispensable important source material of war industry, even more graphene manufacture.
Since the purity of the hot graphite in day is limited, generally use floatation is purified, and this method can be purified to containing fixed carbon
Grade up to 95 ~ 97%, preparing the graphite of higher purity then needs to use chemical method or high temperature purification method.Wherein, chemical method can make
Graphite purity reaches 99 ~ 99.9%, but needs to be restricted using chemicals, the raisings of purity such as soda acid, hydrofluoric acid, meeting simultaneously
A large amount of waste water, exhaust gas, even noxious material are generated, has serious pollution, many provinces to be banned from use environment；High temperature method
Principle be using the impurity in natural graphite at 2800 ~ 3000 DEG C can nature distillation be gaseous state, and graphite then still keeps solid
State can obtain purity up to 99 ~ 99.999% or more high purity graphite, while not constituting harm to environment after solid and gas separation,
Therefore this method is in widespread attention, has a extensive future.
It is high with nuclear industry, lithium ion battery negative material industry, artificial diamond industrial and graphene industrial expansion
Supply falls short of demand for purity graphite, and the high-purity high crystallinity graphite of especially high temperature purification is more rare.
Currently, the equipment that existing high temperature purification technology uses is usually the high temperature furnaces such as " acheson furnace " or " interior string stove ", adopt
Technique with above-mentioned existing equipment is indirect type operation, is had the following disadvantages：One, unstable product quality, every batch of product quality
There is some difference；Two, high energy consumption, product per ton need the electric energy of 12000 ~ 18000 kWh/t of consumption；Three, equipment yield is low,
Produce about 400t/ platforms a per year.
Therefore, above-mentioned the shortcomings of the prior art how is solved, is become as the project of the invention to be researched and solved.
Invention content
The purpose of the present invention is to provide the high temperature purification techniques and device of a kind of natural graphite.
In order to achieve the above objectives, the present invention in technique level the technical solution adopted is that：
A kind of high temperature purification technique of natural graphite, includes the following steps：
The first step pre-processes graphite raw material, removes moisture and organic volatile in raw material；
Graphite raw material after pretreatment is sent into rotary calcining device and is calcined by second step, and graphite is former in calcination process
Suspended state is presented in material, makes graphite raw material thermally equivalent；
Wherein, calcination temperature is 2600 ~ 4200 DEG C, and calcination time is 6 ~ 40min；Guarantor is filled in calcination process into calciner plant
Gas is protected, makes to form protective atmosphere in calciner plant；The concentration of the protective gas be greater than or equal to 85%, pressure be 0.005 ~
0.1MPa；
Third walks, and impurity component distillation is that gas is overflowed by the exhaust passage of calciner plant, graphite products going out through calciner plant
Expect end discharge.
Related content in above-mentioned technical proposal is explained as follows：
1. in said program, the graphite raw material selects powdery natural flake graphite（Or amorphous graphite）, the fixed carbon in raw material
Content is at least 80 ~ 95%, and is preferred with 95 ~ 97%, and carbon content is too low to mean that impurity is more, and in calcining, exhaust gas is easy to block
Exhaust passage.
2. in said program, the inert gases such as argon gas, nitrogen can be selected in the protective gas.
3. in said program, pretreatment includes at least calcining of 20min or roasting in the first step, and temperature is 550 ~ 1000
℃.Water content after preprocessed in graphite raw material is not higher than 0.05%, which is not the invention point of the case, therefore pre-
The visual concrete condition of conditions such as the time of processing and temperature is adjusted, and details are not described herein again.
4. in said program, preferably 2800 ~ 3000 DEG C of the calcination temperature in second step, MgO in the graphite that can effectively gasify,
The impurity such as CaO, Fe3O4, SiO2.
5. in said program, the calcination time in second step is 8 ~ 30 min.
6. in said program, the concentration of the protective gas is greater than or equal to 95% in the calciner plant in second step.
7. in said program, the pressure of the protective gas is 0.01 ~ 0.03 MPa in the calciner plant in second step.
8. further including the discharging after the pan feeding temperature before calcining, and calcining other than calcination temperature in said program
Temperature；Wherein, pan feeding temperature is 1500 ~ 2800 DEG C, preferably 1600 ~ 2600 DEG C, is heated up in advance before calcination；Drop temperature is
2600 ~ 4200 DEG C, preferably 2800 ~ 3000 DEG C, with steady production quality, and the gasification impurity that can avoid in atmosphere crystallizes herein.
9. in said program, in third step, delivery temperature is to be to be greater than or equal to 2800 DEG C more than or equal to 2600 DEG C
It is good, it avoids impurity from occurring to crystallize because temperature reduces and then blocks exhaust passage.
10. further include the 4th step in said program, it is to the graphite products after discharging through cooling down, product temperature is cold
But to 30 ~ 50 DEG C.Since the product temperature after just discharging still is up to 1500 ~ 1800 DEG C, needed after graphite products discharging
It is introduced into a discharge system, which is down to low temperature by the temperature of graphite products by water-cooled cooling and packs again.
In order to achieve the above objectives, the present invention in device level the technical solution adopted is that：
A kind of high temperature purification device of natural graphite, including be sequentially communicated the feed zone of setting from front to back in the horizontal direction, forge
Burn section and discharging section；
Wherein, the feed zone includes one first heating cylinder, which is equipped with a feed inlet, the first cartridge heater
It is equipped with a feeding mechanism in vivo；
Second heating cylinder of the calcining section with single-revolution, the second heating cylinder accumbency in the horizontal direction, and along its water
Square to center line rotation；The front end of second heating cylinder and the feeding mechanism of the feed zone are connected with, the second heating
The rear end of cylinder is connected with the discharging section；Graphite raw material is sent into the second heating cylinder by the feeding mechanism, through the second heating
Enter the discharging section after the heating and calcining of cylinder；
The discharging section includes a third heating cylinder, which is equipped with a discharge port, for discharging；Further include
One gas injection port, the gas injection port be used for into device insufflation protective gas, constitute the third heating cylinder and described second plus
An air-flow moved forward is formed in hot cylinder；
Described device is additionally provided with an exhaust outlet, which is located at the front of the calcining section and opens up upwards, is forged for being discharged
The exhaust gas generated when burning.
Related content in above-mentioned technical proposal is explained as follows：
1. in said program, the gas injection port forms air-flow by insufflation protective gas, and the air-flow is in the third, the second cartridge heater
Internal movement is in circuit counterclockwise, on the one hand a protective atmosphere can be formed in portion in the device, when on the other hand can push calcining
The exhaust gas of generation is discharged via exhaust outlet forward.
2. in said program, the structure composition of first heating cylinder from its cross section angle from inside to outside successively
Including heating layer, insulating layer and shell.The heating layer can be made of carbon heater element, using the form of resistance heating.
3. in said program, the structure composition of second heating cylinder and the third heating cylinder is from cross section angle
Observation includes electromagnetic induction heating layer, insulating layer, insulating layer and hot-wire coil successively from inside to outside.
4. in said program, the insulating layer of second heating cylinder and the third heating cylinder is by accounting for 1/3 thickness
Hard carbon felt and account for the soft carbon felt of 2/3 thickness and be composed from inside to outside, to reach more harsh thermal requirements.
5. in said program, the insulating layer is nonmetallic every magnetosphere.
6. in said program, the hot-wire coil uses the direct current or AC alternating current of intermediate frequency, to realize to second, the
Three heating cylinders effectively penetrate, and low-frequency current can not be penetrated effectively, and high-frequency current is then more demanding to circuit structure；It is described
Hot-wire coil is the hollow cable architecture of water flowing, to carry out water-cooled cooling when being powered on.
7. in said program, by using this contactless heating of electromagnetic induction, electric conversion rate is removed up to 96%
This and it is outer, also can be used the mode of plasma heating and electric arc heated, but be not so good as the efficient of electromagnetic induction fever.
8. in said program, the feeding mechanism is a horizontally disposed screw charging ram, the feed inlet corresponds to the spiral shell
The front end setting of charging ram is revolved, the rear end of screw charging ram corresponds to the calcining section setting, put for that will pass through the feed inlet
The powdered graphite raw water entered is put down and is pushed in the calcining section.
9. in said program, a discharging mechanism is equipped in the third heating cylinder, which is one horizontally disposed
Screw charging ram, front end corresponds to calcining section setting, and its rear end corresponds to the discharge port setting, and being used for will be after calcining
Graphite products level push discharging.
10. in said program, multiple lifting blades, each lifting are arranged at intervals on the inner wall of second heating cylinder
Plate along the second heating cylinder circumferentially, and towards the internal stretch of second heating cylinder；
Wherein, the outer end of the lifting blade is fixedly arranged on the inner wall of second heating cylinder, and the inner end of the lifting blade is formed with
One crook, and the rotation direction of the crook towards second heating cylinder is arranged.
11. further including support portion, support roller portion, driving mechanism and drive mechanism in said program；The support portion is fixed
In ground, the upper end of support portion is for being connected with the support roller portion or the drive mechanism, the described in support roller portion rotational support
Two heating cylinders；The driving mechanism drives second heating cylinder to be rotated by drive mechanism.
The driving mechanism includes motor and speed reducer, and the drive mechanism includes the tooth being made of gear wheel, pinion gear
Drive mechanism is taken turns, can also be belt transmission structure；The driving mechanism and the specific constructive form of the drive mechanism have
A variety of implementations, are skillfully grasped for those skilled in the art, therefore this case repeats no more this.
12. in said program, the exhaust ports are provided with an exhaust passage, the side wall construction of the exhaust passage by it is interior to
Include heating layer, insulating layer and shell successively outside.
The exhaust outlet and the exhaust passage can be positioned at the rear end of the feed zone, and the side wall construction of exhaust passage can
It is consistent with first heating cylinder, it is designed whereby to realize that continuous heating avoids vaporized impurity from being arranged via exhaust passage
It is condensed because of low temperature when going out, exhaust passage is avoided to block.
13. in said program, the exhaust passage is also provided with a cyclone dust collector, for detaching and collecting in exhaust
Large granular impurity, can be used as building material and be used；Cyclone dust collector is also connected with a dust cloth bag, for collecting exhaust
In dust impurities, so as to be expelled to the gas meet the requirement of environmental protection of environment.
14. in said program, between the feed zone and the calcining section and the calcining section and the discharging section it
Between pass through sealing structure（Such as sealing strip）Form dynamic sealing.
The operation principle and advantage of the present invention is as follows：
The high temperature purification technique and device, technique of a kind of natural graphite of the present invention includes：One, it pre-processes, removes in raw material
Moisture and organic volatile；Two, raw material feeding rotary calcining device is calcined, when calcining raw material in suspended state uniformly by
Heat；2600 ~ 4200 DEG C of temperature, 6 ~ 40min of time；It is filled with protective gas in calciner plant and forms protective atmosphere；Protective gas
Concentration is greater than or equal to 85%, and pressure is 0.005 ~ 0.1MPa；Three, impurity component distillation is that gas is led to by the exhaust of calciner plant
Track overflow, graphite products are discharged through discharge end；
Its device includes feed zone, calcining section and discharging section；Feed zone includes the first heating cylinder, is equipped with feed inlet and charging
Mechanism；Calcining section, there is the second heating cylinder of revolution, front end to be connected with feeding mechanism, and rear end is connected with discharging section；Discharging
Section includes third heating cylinder, is equipped with discharge port and gas injection port, and gas injection port is used for the insufflation protective gas into device, constitutes the
An air-flow moved forward is formed in three heating cylinders and the second heating cylinder；Device is additionally provided with exhaust outlet, is located at calcining section
Front simultaneously opens up upwards, for the exhaust gas generated when calcining to be discharged.
Compared to existing technologies, purifying technique of the invention is the continous way purifying technique under high temperature, and energy consumption can be down to
5000 ~ 7000kWh/t, and the continous way quality of production is stablized, production efficiency is high, and annual output rate can reach 500 ~ 1200 t/ platforms a.
Description of the drawings
Attached drawing 1 is the structural schematic diagram of the embodiment of the present invention；
Attached drawing 2 is A-A profile structure diagram in Fig. 1；
Attached drawing 3 is B-B cross-section structure diagram in Fig. 1；
Attached drawing 4 be in Fig. 1 C-C to cross-sectional view；
Attached drawing 5 is the structural schematic diagram of exhaust system at I in Fig. 1.
In the figures above：1. feed zone；2. calcining section；3. discharging section；4. sealing strip；5. the first heating cylinder；6. charging
Mouthful；7. heating layer；8. insulating layer；9. shell；10. screw charging ram；11. the second heating cylinder；12. lifting blade；13. third adds
Hot cylinder；14. discharge port；15. gas injection port；16. air-flow；17. exhaust outlet；18. electromagnetic induction heating layer；19. insulating layer；20.
Insulating layer；21. hot-wire coil；22. screw charging ram；23. exhaust passage；24. cyclone dust collector；25. dust cloth bag；26.
Support portion；27. support roller portion；28. pinion gear；29. gear wheel.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and embodiments：
Embodiment：Shown in attached drawing 1, a kind of the high temperature purification technique and device of natural graphite, wherein the technique include with
Lower step：
The first step pre-processes graphite raw material, removes moisture and organic volatile in raw material；The pretreatment includes at least
The calcining or roasting of 20min, temperature are 550 ~ 1000 DEG C.Water content after preprocessed in graphite raw material is not higher than 0.05%,
The pretreating process is not the invention point of the case, therefore the visual concrete condition of conditions such as pretreated time and temperature is adjusted, this
Place repeats no more.
Graphite raw material after pretreatment is sent into rotary calcining device and is calcined by second step, stone in calcination process
Suspended state is presented in black raw material, makes graphite raw material thermally equivalent；
Wherein, calcination temperature be 2600 ~ 4200 DEG C, preferably 2800 ~ 3000 DEG C, in the graphite that effectively gasifies MgO, CaO,
The impurity such as Fe3O4, SiO2；Calcination time is 6 ~ 40min, preferably 8 ~ 30 min；Guarantor is filled in calcination process into calciner plant
Protect gas（Such as argon gas, nitrogen）, make to form protective atmosphere in calciner plant；The concentration of the protective gas is greater than or equal to
85%, it is preferred with being greater than or equal to 95%, pressure is 0.005 ~ 0.1MPa, is preferred with 0.01 ~ 0.03 MPa.
Third walks, and impurity component distillation is that gas is overflowed by the exhaust passage of calciner plant, and delivery temperature is to be more than or wait
It in 2600 DEG C, is preferred with being greater than or equal to 2800 DEG C, condensation and then the row of blocking occurs because temperature reduces to avoid the impurity of gasification
Gas channel；Discharge end discharge of the graphite products through calciner plant, purity can reach 99~99.999%.
Wherein, in second step, other than calcination temperature, further include calcining before pan feeding temperature, and calcining after go out
Material temperature degree；Wherein, pan feeding temperature is 1500 ~ 2800 DEG C, preferably 1600 ~ 2600 DEG C, is heated up in advance before calcination；Drop temperature
It is 2600 ~ 4200 DEG C, preferably 2800 ~ 3000 DEG C, with steady production quality, and the gasification impurity that can avoid in atmosphere is tied herein
It is brilliant.
Further include the 4th step, that is, to the graphite products after discharging through cooling down, product temperature is cooled to 30 ~ 50 DEG C.
Since the product temperature after just discharging still is up to 1500 ~ 1800 DEG C, need to be introduced into a row after graphite products discharging
The temperature of graphite products is down to low temperature by water-cooled cooling and packed again by material system, the discharge system.
As shown in Fig. 1 ~ 4, described device includes the feed zone 1 for being sequentially communicated setting from front to back in the horizontal direction, calcining
Section 2 and discharging section 3；Wherein, between the feed zone 1 and the calcining section 2 and the calcining section 2 and the discharging section 3
Between by sealing structure, such as sealing strip 4, form dynamic sealing.Described device is additionally provided with an exhaust outlet 17, the exhaust outlet 17
It in the front of the calcining section 2, is opened in the feed zone 1 and opens up upwards, for the exhaust gas generated when calcining to be discharged, this is useless
Gas bag includes vaporized impurity and part protective gas.
Wherein, as shown in Fig. 2, the feed zone 1 includes one first heating cylinder 5, on the front end of first heating cylinder 5
Side is equipped with a feed inlet 6, and a feeding mechanism is equipped in the first heating cylinder 5；The structure composition of first heating cylinder 5 from its
Cross section angle observation includes heating layer 7, insulating layer 8 and shell 9, the heating layer 7 of the first heating cylinder 5 successively from inside to outside
It can be made of carbon heater element, using the form of resistance heating.The feeding mechanism is a horizontally disposed screw charging ram 10,
The feed inlet 6 corresponds to the front end setting of the screw charging ram 10, and the rear end of screw charging ram 10 corresponds to the calcining section 2 and sets
It sets, for that will pass through, powdered graphite raw water that the feed inlet 6 is put into is flat to be pushed in the calcining section 2.
As shown in figure 3, the calcining section 2 has the second heating cylinder 11 of single-revolution（As rotary kiln）, this second plus
The accumbency in the horizontal direction of hot cylinder 11, and rotated along the center line of its horizontal direction；The front end of second heating cylinder 11 with
The feeding mechanism of the feed zone 1 is connected with, and rear end and the discharging section 3 of the second heating cylinder 11 are connected with；The feeding mechanism
Powdered graphite raw material is sent into the second heating cylinder 11, the discharging section 3 is entered after the heating and calcining of the second heating cylinder 11；
Multiple lifting blades 12 are arranged at intervals on the inner wall of second heating cylinder 11, each lifting blade 12 is along the second heating cylinder
11 circumferentially, and towards the internal stretch of second heating cylinder 11；Wherein, the outer end of the lifting blade 12 is fixed
It is formed with a crook in the inner end of the inner wall of second heating cylinder 11, the lifting blade 12（It is not drawn in figure）, and should
The rotation direction of crook towards second heating cylinder 11 is arranged, the design of poplar flitch 12 whereby, helps to add second
11 swinging of hot cylinder raises graphite, makes to keep suspended state when its calcining.
As shown in figure 4, the discharging section 3 includes a third heating cylinder 13, which goes out equipped with one
Material mouth 14, which is located at below the rear end of third cartridge heater 13, for discharging；Further include a gas injection port 15, the gas injection
Mouth 15 is located at the upper rear ends of third cartridge heater 13, for the insufflation protective gas into device, constitutes the third heating cylinder
13 and second heating cylinder 11 in formed one move forward air-flow 16, the air-flow 16 is in the third, the second cartridge heater
Movement in body 13,11 is in circuit counterclockwise, on the one hand can form a protective atmosphere in portion in the device, on the other hand can push and forge
The exhaust gas generated when burning is discharged via the exhaust outlet 17 forward.
As shown in Figure 3,4, the structure composition of second heating cylinder 11 and the third heating cylinder 13 is from cross section
Angle observation includes electromagnetic induction heating layer 18, insulating layer 19, insulating layer 20 and hot-wire coil 21 successively from inside to outside.Its
In, the insulating layer 19 of the second heating cylinder 11 and third heating cylinder 13 by the hard carbon felt for accounting for 1/3 thickness and accounts for 2/3 thickness
The soft carbon felt of degree is composed from inside to outside（It is not drawn in figure）, to reach more harsh thermal requirements；The insulating layer 20 is
It is nonmetallic every magnetosphere；The hot-wire coil 21 heats second, third with realizing using the direct current or AC alternating current of intermediate frequency
Cylinder 11,13 effectively penetrates, and low-frequency current can not be penetrated effectively, and high-frequency current is then more demanding to circuit structure；It is described
Hot-wire coil 21 is the hollow cable architecture of water flowing, to carry out water-cooled cooling when being powered on；
By using this contactless heating of electromagnetic induction, electric conversion rate is up to 96%, in addition to this, also can be used
Gas ions heat and the mode of electric arc heated, but are not so good as the efficient of electromagnetic induction fever.
A discharging mechanism is equipped in the third heating cylinder 13, which is a horizontally disposed screw charging ram
22, front end corresponds to the calcining section 2 and is arranged, and its rear end corresponds to the setting of the discharge port 14, and being used for will be through the graphite after calcining
Product Level push discharging.
As shown in Fig. 2, be provided with an exhaust passage 23 at the exhaust outlet 17, the side wall construction of the exhaust passage 23 can be with
First heating cylinder 5 is consistent, includes successively from inside to outside heating layer 7, insulating layer 8 and shell 9, is designed whereby to realize
Continuous heating avoids vaporized impurity from being condensed because of low temperature when being discharged via exhaust passage 23, and exhaust passage is avoided to block.
As shown in figure 5, the exhaust passage 23 is also provided with a cyclone dust collector 24, for detaching and collecting in exhaust
Large granular impurity, can be used as building material and be used；Cyclone dust collector 24 is also connected with a dust cloth bag 25, for collecting
Dust impurities in exhaust, so as to be expelled to the gas meet the requirement of environmental protection of environment.
Wherein, further include support portion 26, support roller portion 27, driving mechanism（It is not drawn in figure）And drive mechanism；The branch
Support part 26 is fixedly arranged on ground, and the upper end of support portion 26 is for being connected with the support roller portion 27 or the drive mechanism, the support roller portion
Second heating cylinder 11 described in 27 rotational supports；The driving mechanism by drive mechanism drive second heating cylinder 11 into
Row rotation.The driving mechanism includes motor and speed reducer, and the drive mechanism includes being made of pinion gear 28, gear wheel 29
Gear transmission structure can also be belt transmission structure；The specific constructive form of the driving mechanism and the drive mechanism
There are many implementations, are skillfully grasped for those skilled in the art, therefore this case repeats no more this.
Compared to existing technologies, purifying technique of the invention is the continous way purifying technique under high temperature, and energy consumption can be down to
5000 ~ 7000kWh/t, and the continous way quality of production is stablized, production efficiency is high, and annual output rate can reach 500 ~ 1200 t/ platforms a.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of high temperature purification technique of natural graphite, it is characterised in that：Include the following steps：
The first step pre-processes graphite raw material, removes moisture and organic volatile in raw material；
Graphite raw material after pretreatment is sent into rotary calcining device and is calcined by second step, and graphite is former in calcination process
Suspended state is presented in material, makes graphite raw material thermally equivalent；
Wherein, calcination temperature is 2600 ~ 4200 DEG C, and calcination time is 6 ~ 40min；Guarantor is filled in calcination process into calciner plant
Gas is protected, makes to form protective atmosphere in calciner plant；The concentration of the protective gas be greater than or equal to 85%, pressure be 0.005 ~
0.1MPa；
Third walks, and impurity component distillation is that gas is overflowed by the exhaust passage of calciner plant, graphite products going out through calciner plant
Expect end discharge.
2. high temperature purification technique according to claim 1, it is characterised in that：Pretreatment includes at least 20min in the first step
Calcining or roasting, temperature be 550 ~ 1000 DEG C.
3. high temperature purification technique according to claim 1, it is characterised in that：Calcination temperature in second step is 2800 ~
3000℃；Calcination time is 8 ~ 30 min.
4. high temperature purification technique according to claim 1, it is characterised in that：Further include calcining other than calcination temperature
Drop temperature after preceding pan feeding temperature, and calcining；Wherein, pan feeding temperature be 1500 ~ 2800 DEG C, drop temperature be 2600 ~
4200℃。
5. high temperature purification technique according to claim 1, it is characterised in that：In third step, delivery temperature is to be more than or wait
In 2600 DEG C.
6. a kind of high temperature purification device of natural graphite, it is characterised in that：
Feed zone, calcining section and discharging section including being sequentially communicated setting from front to back in the horizontal direction；
Wherein, the feed zone includes one first heating cylinder, which is equipped with a feed inlet, the first cartridge heater
It is equipped with a feeding mechanism in vivo；
Second heating cylinder of the calcining section with single-revolution, the second heating cylinder accumbency in the horizontal direction, and along its water
Square to center line rotation；The front end of second heating cylinder and the feeding mechanism of the feed zone are connected with, the second heating
The rear end of cylinder is connected with the discharging section；Graphite raw material is sent into the second heating cylinder by the feeding mechanism, through the second heating
Enter the discharging section after the heating and calcining of cylinder；
The discharging section includes a third heating cylinder, which is equipped with a discharge port, for discharging；Further include
One gas injection port, the gas injection port be used for into device insufflation protective gas, constitute the third heating cylinder and described second plus
An air-flow moved forward is formed in hot cylinder；
Described device is additionally provided with an exhaust outlet, which is located at the front of the calcining section and opens up upwards, is forged for being discharged
The exhaust gas generated when burning.
7. purifying plant according to claim 6, it is characterised in that：The structure composition of first heating cylinder is horizontal from it
Section angle observation includes heating layer, insulating layer and shell successively from inside to outside.
8. purifying plant according to claim 6, it is characterised in that：Second heating cylinder and the third cartridge heater
The structure composition of body from the angle of cross section from inside to outside successively include electromagnetic induction heating layer, insulating layer, insulating layer with
And hot-wire coil.
9. purifying plant according to claim 6, it is characterised in that：Setting is spaced on the inner wall of second heating cylinder
Have multiple lifting blades, each lifting blade along the second heating cylinder circumferentially, and towards second heating cylinder
Internal stretch；
Wherein, the outer end of the lifting blade is fixedly arranged on the inner wall of second heating cylinder, and the inner end of the lifting blade is formed with
One crook, and the rotation direction of the crook towards second heating cylinder is arranged.
10. purifying plant according to claim 6, it is characterised in that：The exhaust ports are provided with an exhaust passage, should
The side wall construction of exhaust passage includes heating layer, insulating layer and shell successively from inside to outside.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109231199A (en) * | 2018-11-27 | 2019-01-18 | 湖南顶立科技有限公司 | A kind of material purifying plant |
| CN109502579A (en) * | 2018-11-27 | 2019-03-22 | 苏州中材非金属矿工业设计研究院有限公司 | The technique of natural graphite alkali acid system purification |
| CN111017922A (en) * | 2020-01-09 | 2020-04-17 | 成都理工大学 | Activation method of natural crystalline graphite fine powder for preparing high-purity graphite |
| CN114477164A (en) * | 2020-11-12 | 2022-05-13 | 石门县顺超科技发展有限公司 | Graphite purification device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB748018A (en) * | 1951-11-16 | 1956-04-18 | Graphitwerk Kropfmuehl Ag | A method for the chemical purification of natural graphite |
| CN107500269A (en) * | 2017-08-24 | 2017-12-22 | 中山国安火炬科技发展有限公司 | A kind of high temperature purification equipment of high-purity CNT or graphite powder and preparation method thereof |
| CN107522197A (en) * | 2017-09-15 | 2017-12-29 | 福建翔丰华新能源材料有限公司 | The method of the preparation high-purity of economy, the micro crystal graphite of high graphitization degree |
| CN207108495U (en) * | 2017-04-28 | 2018-03-16 | 福建凯昱微晶石墨有限公司 | A kind of micro crystal graphite purifying plant |
| CN108033445A (en) * | 2018-01-09 | 2018-05-15 | 湖州凯金新能源科技有限公司 | A kind of formation system of graphite cathode |
-
2018
- 2018-06-13 CN CN201810604668.5A patent/CN108529616B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB748018A (en) * | 1951-11-16 | 1956-04-18 | Graphitwerk Kropfmuehl Ag | A method for the chemical purification of natural graphite |
| CN207108495U (en) * | 2017-04-28 | 2018-03-16 | 福建凯昱微晶石墨有限公司 | A kind of micro crystal graphite purifying plant |
| CN107500269A (en) * | 2017-08-24 | 2017-12-22 | 中山国安火炬科技发展有限公司 | A kind of high temperature purification equipment of high-purity CNT or graphite powder and preparation method thereof |
| CN107522197A (en) * | 2017-09-15 | 2017-12-29 | 福建翔丰华新能源材料有限公司 | The method of the preparation high-purity of economy, the micro crystal graphite of high graphitization degree |
| CN108033445A (en) * | 2018-01-09 | 2018-05-15 | 湖州凯金新能源科技有限公司 | A kind of formation system of graphite cathode |
Non-Patent Citations (1)
| Title |
|---|
| 边炳鑫: "《石墨加工与石墨材料》", 31 May 2014, 中国矿业大学出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109231199A (en) * | 2018-11-27 | 2019-01-18 | 湖南顶立科技有限公司 | A kind of material purifying plant |
| CN109502579A (en) * | 2018-11-27 | 2019-03-22 | 苏州中材非金属矿工业设计研究院有限公司 | The technique of natural graphite alkali acid system purification |
| CN111017922A (en) * | 2020-01-09 | 2020-04-17 | 成都理工大学 | Activation method of natural crystalline graphite fine powder for preparing high-purity graphite |
| CN111017922B (en) * | 2020-01-09 | 2022-04-12 | 成都理工大学 | Activation method of natural crystalline graphite fine powder for preparing high-purity graphite |
| CN114477164A (en) * | 2020-11-12 | 2022-05-13 | 石门县顺超科技发展有限公司 | Graphite purification device |
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